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Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Jan. 31, 2018	Mar. 23, 2018	Jul. 31, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	OOMA
Entity Registrant Name	Ooma Inc
Entity Central Index Key	0001327688
Current Fiscal Year End Date	--01-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		19,400,000
Entity Public Float			$ 140

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 4,483	$ 3,990
Short-term investments	47,307	49,211
Accounts receivable, net	2,858	4,714
Inventories	6,079	5,830
Deferred inventory costs	1,061	1,620
Prepaid expenses and other current assets	3,336	1,891
Total current assets	65,124	67,256
Property and equipment, net	4,732	4,176
Intangible assets, net	1,292	537
Goodwill	1,947	1,117
Other assets	336	252
Total assets	73,431	73,338
Current liabilities:
Accounts payable	5,453	5,857
Accrued expenses	14,777	11,579
Deferred revenue	15,556	15,521
Total current liabilities	35,786	32,957
Other liabilities	577	561
Total liabilities	36,363	33,518
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock $0.0001 par value: 10 million shares authorized; no shares issued and outstanding on January 31, 2018 and 2017, respectively
Common stock $0.0001 par value: 100 million shares authorized; 19.1 million and 18.0 million shares issued and outstanding on January 31, 2018 and 2017, respectively	2	2
Additional paid-in capital	128,081	117,639
Accumulated other comprehensive loss	(84)	(11)
Accumulated deficit	(90,931)	(77,810)
Total stockholders’ equity	37,068	39,820
Total liabilities and stockholders’ equity	$ 73,431	$ 73,338

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jan. 31, 2018	Jan. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	19,100,000	18,000,000
Common stock, shares outstanding	19,100,000	18,000,000

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Revenue:
Subscription and services	$ 101,999	$ 91,127	$ 73,064
Product and other	12,491	13,397	15,711
Total revenue	114,490	104,524	88,775
Cost of revenue:
Subscription and services	31,406	29,650	25,715
Product and other	14,992	15,545	16,150
Total cost of revenue	46,398	45,195	41,865
Gross profit	68,092	59,329	46,910
Operating expenses:
Sales and marketing	37,302	33,768	28,534
Research and development	29,328	24,239	18,502
General and administrative	15,186	14,598	12,561
Total operating expenses	81,816	72,605	59,597
Loss from operations	(13,724)	(13,276)	(12,687)
Other income (expense):
Interest and other income (expense), net	603	327	(923)
Change in fair value of warrants			(442)
Net loss	$ (13,121)	$ (12,949)	$ (14,052)
Net loss per share of common stock:
Basic and diluted	$ (0.71)	$ (0.74)	$ (1.38)
Weighted-average number of shares used in per share amounts:
Basic and diluted	18,570,128	17,490,448	10,173,095

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
BALANCE at Jan. 31, 2015	$ (45,145)	$ 33,637		$ 5,611		$ (50,756)
BALANCE, Shares at Jan. 31, 2015		8,353,748	2,515,065
Issuance of Series Beta preferred stock, net		$ 5,000
Issuance of Series Beta preferred stock, net, Shares		241,469
Conversion of preferred stock to common stock upon IPO (see Note 7)	38,637	$ (38,637)	$ 1	38,636
Conversion of convertible preferred stock to common stock upon IPO (See Note 7), Shares		(8,595,217)	8,878,857
Issuance of common stock upon IPO, net	56,879		$ 1	56,878
Issuance of common stock upon IPO, net, Shares			5,000,000
Reclassification of preferred warrant liability	1,075			1,075
Issuance of common stock related to acquisition	451			451
Issuance of common stock related to acquisition, Shares			49,159
Issuance of common stock under equity based plans	331			331
Issuance of common stock under equity based plans, Shares			426,075
Exercise of warrants to common stock	44			44
Exercise of warrants to common stock, Shares			47,094
Stock-based compensation	4,653			4,653
Other comprehensive income (loss)	17				$ 17
Net loss	(14,052)					(14,052)
BALANCE at Jan. 31, 2016	42,890		$ 2	107,679	17	(64,808)
BALANCE, Shares at Jan. 31, 2016			16,916,250
Issuance of common stock related to acquisition	165			165
Issuance of common stock related to acquisition, Shares			26,375
Issuance of common stock under equity based plans	1,558			1,558
Issuance of common stock under equity based plans, Shares			1,223,211
Shares repurchased for tax withholdings on vesting of RSUs	(1,588)			(1,588)
Shares repurchased for tax withholdings on vesting of RSUs, Shares			(170,281)
Stock-based compensation	9,772			9,772
Other comprehensive income (loss)	(28)				(28)
Cumulative stock-based compensation forfeiture adjustment				53		(53)
Net loss	(12,949)					(12,949)
BALANCE at Jan. 31, 2017	39,820		$ 2	117,639	(11)	(77,810)
BALANCE, Shares at Jan. 31, 2017			17,995,555
Issuance of common stock under equity based plans	1,964			1,964
Issuance of common stock under equity based plans, Shares			1,345,392
Shares repurchased for tax withholdings on vesting of RSUs	(2,443)			(2,443)
Shares repurchased for tax withholdings on vesting of RSUs, Shares			(244,865)
Exercise of warrants to common stock, Shares			19,352
Stock-based compensation	10,921			10,921
Other comprehensive income (loss)	(73)				(73)
Net loss	(13,121)					(13,121)
BALANCE at Jan. 31, 2018	$ 37,068		$ 2	$ 128,081	$ (84)	$ (90,931)
BALANCE, Shares at Jan. 31, 2018			19,115,434

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Cash flows from operating activities:
Net loss	$ (13,121)	$ (12,949)	$ (14,052)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Stock-based compensation expense	10,921	9,772	4,653
Depreciation and amortization of property and equipment	1,958	1,648	1,410
Amortization of acquired intangible assets	313	348	393
Amortization and accretion of premiums from investments	135	211	64
Write-off of non-cash deferred debt issuance costs			332
Net changes in fair value of warrants and contingent liability			161
Changes in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	1,856	895	(1,215)
Inventories	(249)	(819)	3,070
Deferred inventory costs	559	393	235
Prepaid expenses and other assets	(1,519)	84	(470)
Accounts payable and other liabilities	2,366	(156)	4,260
Deferred revenue	(46)	958	689
Net cash provided by (used in) operating activities	3,173	385	(470)
Cash flows from investing activities:
Purchases of short-term investments	(49,331)	(59,007)	(28,078)
Proceeds from maturities of short-term investments	49,217	32,330
Proceeds from sales of short-term investments	1,800	5,266
Purchases of property and equipment	(2,478)	(1,558)	(2,884)
Business acquisition, net of cash assumed	(1,363)
Net cash used in investing activities	(2,155)	(22,969)	(30,962)
Cash flows from financing activities:
Proceeds from issuance of common stock	1,918	1,477	221
Proceeds from initial public offering and preferred stock, net			62,021
Repayment of debt, capital leases and warrants		(628)	(12,204)
Payment of acquisition related earn-out		(100)	(326)
Net cash (used in) provided by financing activities	(525)	(839)	49,712
Net increase (decrease) in cash and cash equivalents	493	(23,423)	18,280
Cash and cash equivalents at beginning of period	3,990	27,413	9,133
Cash and cash equivalents at end of period	4,483	3,990	27,413
Supplemental disclosure of cash flow information:
Income taxes paid		3	2
Interest paid		18	573
Non-cash investing and financing activities:
Unpaid portion of property and equipment purchases	146	122	78
Contingent consideration for business acquisition	311
Shares issued for business acquisition and related earn-out		165	451
Conversion of preferred stock to common stock			38,637
De-recognition of warrant liability to additional paid-in capital			1,075
Restricted Stock Units (RSUs)
Cash flows from financing activities:
Shares repurchased for tax withholdings on vesting of RSUs	$ (2,443)	$ (1,588)	$ 0

Overview And Basis of Presentation	12 Months Ended
Overview And Basis of Presentation	Jan. 31, 2018
Accounting Policies [Abstract]
Overview and Basis of Presentation	Note 1: Overview and Basis of Presentation Ooma, Inc. and its wholly-owned subsidiaries (collectively, “Ooma” or the “Company”) create new communications experiences for businesses and consumers. The Company’s smart SaaS platform serves as a communications hub, which offers cloud-based telephony, home security and other connected services. Principles of Presentation and Consolidation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated upon consolidation. In the opinion of the Company’s management, the consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. Fiscal Year. The Company’s fiscal year ends on January 31. References to fiscal 2018, fiscal 2017 and fiscal 2016 refer to the fiscal years ended January 31, 2018, January 31, 2017 and January 31, 2016, respectively. Use of Estimates. The preparation of the Company’s financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Comprehensive Loss. For all periods presented, comprehensive loss approximated net loss in the consolidated statements of operations. Therefore, the consolidated statements of comprehensive loss have been omitted.

Significant Accounting Policies

12 Months Ended

Jan. 31, 2018

Accounting Policies [Abstract]

Significant Accounting Policies

Note 2: Significant Accounting Policies

Revenue Recognition. The Company derives its revenue from two sources: (1) subscription and services revenue, which are generated from sales of subscription plans for communications solutions and other connected services; and (2) product and other revenue. Products and services are sold directly to end-customers via the Company’s website and through distributors and retailers.

The Company recognizes revenue when the following criteria are met:

•

persuasive evidence of an arrangement exists;

•

the service has been or is being provided to the customer, and product delivery has occurred;

•

collection of the fees is reasonably assured; and

•

the amount of fees to be paid by the customer is fixed or determinable.

Subscription and Services Revenue. Most of the Company’s revenue is derived from recurring monthly and annual subscription fees related to service plans such as Ooma Office, Ooma Telo, international calling plans and other subscriptions. Subscription revenue is recognized on a straight-line basis over the contractual service term. Revenue is also generated from billings for prepaid international calls and directory assistance, which are recognized based on actual usage. A small portion of revenue is earned and recognized on a net basis from advertisements displayed through the Company’s Talkatone mobile application. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. See “Deferred Revenue” below.

Product and Other Revenue. Product and other revenue is generated from the sale of on-premise appliances and end-point devices, including shipping and handling fees, as well as from porting fees that enable customers to transfer their existing phone numbers. The Company normally recognizes revenue from sales to direct end-customers at the time the product is shipped. The Company also generates product revenue from sales through distributors, retailers and resellers (collectively the “channel partners”) which are based on written purchase authorizations. The Company’s distribution agreements with its channel partners typically contain clauses for price protection and rights of return, resulting in the pricing for these transactions not being fixed or determinable. Accordingly, the Company defers product revenue and related costs of revenue on these sales until the title transfers to the end-customer. Revenue is recorded net of any sales-related and telecommunications taxes that are billed to customers.

Multiple-element Arrangements. Substantially all of the Company’s arrangements are multiple-element arrangements, which consist of an on-premise appliance and telephony services, which is available on a subscription plan. Telephony services and end-point devices purchased after a customer’s original arrangement are optional purchases that are accounted for as separate arrangements. The Company accounts for each element separately and allocates revenue based on the estimated selling price for each deliverable. The Company determines VSOE of selling price for telephony services and end-point devices based on historical standalone sales to customers. In determining VSOE of selling price, the Company requires that a substantial majority of the selling prices for a product or service fall within a reasonably narrow pricing range of the median selling price. The Company does not have VSOE or TPE for its on-premise appliance and estimates BESP by considering company-specific factors such as pricing strategies, direct product and other costs, and bundling and discounting practices.

The Company does not have VSOE or third-party evidence for its on-premise appliance and allocates revenue based on its best estimate of the selling price, or BESP. The process for determining BESP considers company-specific factors such as pricing strategies, estimated product and other costs, and bundling and discounting practices. The determination of BESP is made through consultation with and approval by the Company’s management.

Deferred Revenue. Deferred revenue primarily consists of billings or payments received in advance of meeting revenue recognition criteria. The Company’s telephony services are sold as monthly or annual subscriptions, payable in advance. The Company recognizes deferred telephony services revenue on a ratable basis over the term of the contract as the services are provided. For all arrangements, any revenue that has been deferred and is expected to be recognized beyond one year is not significant and is classified in long term liabilities on the consolidated balance sheets.

Sales Reserves. The Company records reductions to revenue for estimated sales returns from end-users and customer credits at the time the related revenue is recognized. Sales returns and customer credits are estimated based on historical experience, current trends and expectations regarding future experience. The Company monitors the accuracy of its sales reserve estimates by reviewing actual returns and credits and adjusts them for future expectations to determine the adequacy of current reserve needs. If actual future returns and credits differ from past experience, additional reserves may be required.

Shipping and Handling Costs. Amounts billed to customers related to shipping and handling are classified as revenue, and the Company’s shipping and handling costs are expensed as incurred and classified as cost of revenue.

Cash Equivalents and Short-term Investments. All highly liquid investments with an original maturity of three months or less at the date of purchase are classified as cash equivalents. Short-term investments are classified as available-for-sale and carried at fair value, with unrealized gains and losses, net of tax, recorded as a separate component of stockholders’ equity within accumulated other comprehensive (loss) income. All realized gains and losses and unrealized losses believed to be other-than-temporary are recorded in other expense, net in the current period. The cost of securities sold is based upon the specific identification method.

Fair Value of Financial Instruments. The Company records its financial assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. The Company estimates and categorizes the fair value of its financial assets by applying the following hierarchy:

▪

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets.

▪

Level 2: Observable prices based on inputs not quoted in active markets, but are corroborated by market data.

▪

Level 3: Unobservable inputs that are supported by little or no market activity

Transfers among Level 1, Level 2 and Level 3 classifications are recognized as of the actual date of the events or change in circumstances that caused the transfers. The carrying value of the Company’s financial instruments, including cash equivalents, accounts receivable, inventory, accounts payable and other current assets and current liabilities approximates fair value due to their short maturities.

Segment Reporting. The chief operating decision maker for the Company is the chief executive officer. The Company’s subscription plans, services and product offerings operate on a single SaaS platform and the chief executive officer reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. Accordingly, management has determined that the Company operates in one reportable segment.

Substantially all revenue, based on customer billing addresses, was derived from customers in the United States for all periods presented.

All of the Company’s long-lived assets were attributable to operations in the United States for all periods presented.

Concentration of Credit Risk. Financial instruments that potentially subject the Company to a concentration of credit risk consist cash equivalents, short-term investments and accounts receivables. The Company’s cash equivalents and short-term investments are held by financial institutions that management believes are of high-credit quality. Such investments and deposits may, at times, exceed federally insured limits. The Company performs credit evaluations of its channel partners’ financial condition and generally does not require collateral for sales made on credit.

Customers who represented 10% or more of the Company's net accounts receivable balance were as follows:

	As of January 31,
	2018			2017
Customer A		10	%	*
Customer B	*				11	%

*	Represented less than 10% accounts receivable, net at the end of respective periods.

No single customer accounted for 10% or more of the Company’s consolidated revenues in fiscal 2018, 2017 and 2016.

Accounts Receivable Allowances. Accounts receivable are stated at invoice value less estimated allowances for returns and doubtful accounts. The Company records its allowances based upon its assessment of several factors, including historical experience, aging of receivable balances and economic conditions. As of January 31, 2018 and 2017, the Company recorded allowances for doubtful accounts and returns of $0.4 million and $0.2 million, respectively.

Inventories. Inventories, which consist of raw materials and finished goods, include the cost to purchase manufactured products, allocated labor and overhead. Inventories are stated at the lower of cost or market on a first-in, first-out basis. The Company writes down its inventory for estimated excess and obsolete inventory based upon management’s assessment of future demand and market conditions, and establishes a new cost basis for the inventory. Adjustments to reduce inventory to net realizable value are recognized in cost of revenue.

Deferred Inventory Costs. Deferred inventory cost represents the inventory that has been shipped to a channel partner for which the retailer or distributor has a right of return. The cost of the product sold is recognized contemporaneously with the recognition of revenue, when the end customer has purchased the on-premise appliance or end-point device.

Website Development Costs. The Company capitalizes certain costs to develop its websites when preliminary development efforts are successfully completed, management has authorized and committed project funding, and it is probable that the project will be completed and the software will be used as intended. Such costs are amortized on a straight-line basis over the estimated useful life of the related assets, which approximates two years. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. The Company capitalized website development costs of approximately $0.6 million, $0.4 million and $0.5 million in fiscal 2018, 2017 and 2016, respectively.

Property and Equipment. Property and equipment are stated at cost, less accumulated depreciation. Depreciation is computed over the estimated useful lives of the assets, using the straight-line method, generally three to five years. Leasehold improvements are amortized over the shorter of the lease term or estimated useful lives of the respective assets. Repairs and maintenance costs that do not extend the life or improve the asset are expensed as incurred.

Goodwill and Intangible Assets. Goodwill represents the excess of the purchase price over the fair value of the net assets acquired in a business combination. The Company performs an impairment test of its goodwill in the fourth quarter of its fiscal year, or more frequently if indicators of potential impairment arise. The Company has a single reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. No impairment has been recognized for any of the periods presented. Acquired intangible assets other than goodwill are amortized over their useful lives unless the lives are determined to be indefinite. For intangible assets acquired in a business combination, the estimated fair values of the assets received are used to establish their recorded values. Valuation techniques consistent with the market approach, income approach and/or cost approach are used to measure fair value.

Impairment of Long-Lived Assets. Long-lived assets, such as property and equipment, capitalized website development costs, and intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. The Company did not record any impairment charges in any of the periods presented.

Research and Development. Research and development costs, including new product development, are charged to operating expenses as incurred in the consolidated statements of operations. Such costs included personnel-related costs (including stock-based compensation), allocated costs of facilities and information technology, supplies, software tools and product certification.

Advertising. Advertising costs are included in sales and marketing and expensed as incurred, except for production costs associated with television advertising, which are expensed on the first date of airing. Advertising costs were $14.4 million, $16.5 million and $13.9 million for fiscal 2018, 2017 and 2016, respectively.

Advertising payments to the Company’s channel partners are recorded as a reduction in revenue. These costs totaled $0.3 million, $0.3 million and $0.5 million for fiscal 2018, 2017 and 2016, respectively.

Stock-Based Compensation. Stock-based compensation expense for all stock-based awards granted to employees is measured at the grant date based on the fair value of the equity award and is recognized as expense over the requisite service period, which is generally the vesting period. The fair value of options granted is estimated on the date of grant using the Black-Scholes option pricing model. The fair value of each RSU granted is determined using the fair value of the Company’s common stock on the date of grant. The fair value of each stock purchase right under the Company's ESPP is calculated based on the closing price of the Company's stock on the date of grant and the value of a call and put option is estimated using the Black-Scholes pricing model. See Note 7: Stockholders’ Equity and Note 8: Stock-based Compensation below for additional information.

Income Taxes. Income taxes are recorded using the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income (or loss) in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. A tax position is recognized when it is more-likely-than-not that the tax position will be sustained upon examination, including resolution of any related appeals or litigation processes. A tax position that meets the more likely than not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority.

Interest and penalties associated with unrecognized tax benefits are classified as income tax expense. The Company had no interest or penalty accruals associated with uncertain tax benefits in its consolidated balance sheets and statements of operations for any periods presented.

Foreign currency. The U.S. dollar is the functional currency of the Company's foreign subsidiaries. Foreign currency remeasurement and transaction gains and losses are included in other expense, net and have not been material for any periods presented.

Recent Accounting Standards	12 Months Ended
Recent Accounting Standards	Jan. 31, 2018
Accounting Policies [Abstract]
Recent Accounting Standards	Note 3: Recent Accounting Standards Adopted Accounting Standards Going Concern. The Company adopted ASU 2014-15, Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern in the first quarter of fiscal 2018. The new standard provides guidance around management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The adoption of this standard had no impact on the Company’s consolidated financial statements. Stock Compensation. The Company early adopted ASU 2016-09, Stock Compensation (Topic 718), Scope of Modification Accounting in the third quarter of fiscal 2018. The updated standard provides guidance on the changes to the terms or conditions of a share-based payment award that require an entity to apply modification accounting under Topic 718. The adoption of this standard had no impact on the Company’s consolidated financial statements. Accounting Standards Not Yet Adopted Revenue Recognition and Sales Commissions In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which replaces existing revenue recognition guidance (Topic 605) with a comprehensive revenue measurement and recognition standard and expanded disclosure requirements. Topic 606 also includes Subtopic 340-40, Other Assets and Deferred Costs – Contracts with Customers, which requires the deferral of incremental costs to acquire customer contracts, including sales commissions. Collectively, the Company refers to Topic 606 and Subtopic 340-40 as the “new standard.” The new standard permits adoption either by using (i) a full retrospective method to restate each prior reporting period presented or (ii) a modified retrospective method with the cumulative effect of initially applying the new standard recognized at the date of initial application. The Company adopted the new standard effective February 1, 2018 using the modified retrospective method only with respect to contracts that were not completed as of February 1, 2018. The Company’s decision was based on a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, and the Company’s ability to accumulate and analyze the information necessary to assess the cumulative effect of the new standard through February 1, 2018. In preparation for adoption, the Company has implemented additional accounting reporting processes, transitional internal controls and has reached conclusions on key accounting considerations related to the new standard. The new standard impacts the way the Company recognizes its product revenue for sales made through its channel partners, whereby revenue will be recognized upon the sale to the partners (sell-in basis) instead of the Company’s current recognition upon resale by the partners to the end customers (sell-through basis). Estimates for expected product returns, customer credits and other sales incentives must be made at the time product is shipped, which will require significant management judgment. As a result of adopting the standard, the fiscal 2019 opening balance of deferred product revenue associated with shipments made to channel partners is expected to decrease by approximately $1.4 million, with corresponding adjustments to deferred inventory costs and other related accounts, resulting in a one-time net increase to accumulated deficit of approximately $0.3 million. The adoption of the new standard will also change the Company’s treatment of sales commissions. Beginning with the first quarter of fiscal 2019, the Company will capitalize its incremental commission costs of acquiring customer contracts, which will result in a material increase to the Company’s assets on the consolidated balance sheet. Previously, sales commissions were expensed as incurred. Deferred commissions will be amortized on a systematic basis to sales and marketing expense over an estimated customer life of five years, which was calculated based on both qualitative and quantitative factors, such as product life cycles and customer attrition. As a result of adopting the standard, the fiscal 2019 opening balance of deferred commissions related to contracts that were not completed as of February 1, 2018 is expected to be immaterial. The new standard significantly enhances required disclosures regarding revenue, commissions, and related assets and liabilities beginning in the Company’s Form 10-Q for the period ending April 30, 2018. The adoption of the new standard is not expected to have a significant impact to income taxes and will have no impact on net cash provided by or used in operating, investing and financing activities in the consolidated statements of cash flows. Leases. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) that requires assets and liabilities arising from leases, including operating leases, to be recognized on the balance sheet. ASU 2016-02 will become effective for the Company in the first quarter of fiscal 2020, and requires adoption using a modified retrospective approach. Although the Company is currently evaluating the impact this standard will have on its consolidated financial statements and related disclosures, the Company expects that its operating lease commitments will be subject to the new standard and recognized as operating lease liabilities and right-of-use assets upon adoption. Goodwill. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350) that will eliminate the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, impairment charge will be based on the excess of a reporting unit's carrying amount over its fair value. The guidance is effective for the Company in the first quarter of fiscal 2023. Early adoption is permitted. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements, absent any goodwill impairment.

Fair Value Measurements

12 Months Ended

Jan. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note 4: Fair Value Measurements

The Company’s financial assets and liabilities that are measured at fair value on a recurring basis by level within the fair value hierarchy were as follows (in thousands):

	Balance as of January 31, 2018								Balance as of January 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Total
Assets:
Cash and cash equivalents:
Money market funds	$	554	$	—	$	—	$	554	$	951	$	—	$	951
Commercial paper		—		2,844		—		2,844		—		—		—
Total cash equivalents	$	554	$	2,844	$	—	$	3,398	$	951	$	—	$	951
Cash								1,085						3,039
Total cash and cash equivalents							$	4,483					$	3,990

Short-term investments:
U.S. government securities	$	20,867	$	—	$	—	$	20,867	$	17,798	$	—	$	17,798
Corporate debt securities		—		13,895		—		13,895		—		18,436		18,436
Commercial paper		—		9,272		—		9,272		—		5,386		5,386
U.S. agency securities		—		1,996		—		1,996		—		5,777		5,777
Asset-backed securities		—		1,277		—		1,277		—		1,814		1,814
Total short-term investments	$	20,867	$	26,440	$	—	$	47,307	$	17,798	$	31,413	$	49,211

Liabilities:
Contingent consideration					$	311	$	311
Total liabilities	$	—	$	—	$	311	$	311

The Company classifies its cash equivalents and short-term investments within Level 1 or Level 2 because it uses quoted market prices or alternative pricing sources and models utilizing market observable inputs to determine their fair value. The fair value of Level 2 financial instruments were obtained from an independent pricing service, which used quoted market prices for identical or comparable instruments or model driven valuations that used observable market data or inputs corroborated by observable market data. Commercial paper was valued using market prices, if available, adjusted for accretion of the purchase price to face value at maturity. There were no transfers of financial assets or liabilities between levels during the periods presented.

Gross realized gains and losses related to the Company’s short-term investments were not material for any of the periods presented. Unrealized losses associated with short-term investments in an unrealized loss position as of January 31, 2018 and 2017 were not material. The Company determined there were no investments in its portfolio that were other-than-temporarily impaired.

As of January 31, 2018, the Level 3 liabilities consisted of contingent consideration related to the Company’s acquisition of Butterfleye, Inc. in December 2017 (see Note 12: Acquisitions and Divestitures). The Company estimated the fair value of the contingent consideration using a probability-weighted discounted cash flow model. Key inputs to the model included assumptions regarding the achievement of certain performance milestones and discount rates consistent with the level of risk and economy in general. Contingent consideration was classified as a component of accrued expenses on the consolidated balance sheets. During fiscal 2018, there were no settlements or changes in the fair value of contingent consideration following the acquisition.

The following table classifies the Company’s short-term investments by contractual maturities (in thousands):

	As of January 31, 2018				As of January 31, 2017
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	43,227	$	43,172	$	44,806	$	44,794
Over one year and less than two years		4,164		4,135		4,416		4,417
Total	$	47,391	$	47,307	$	49,222	$	49,211

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Goodwill and Acquired Intangible Assets

12 Months Ended

Jan. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets

Note 5: Goodwill and Acquired Intangible Assets

The carrying amount of goodwill was $1.9 million and $1.1 million as of January 31, 2018 and 2017, respectively. The Company recognized $1.1 million in intangibles and $0.8 million in goodwill following the acquisition of Butterfleye, Inc. in December 2017. See Note 12: Acquisitions and Divestitures below. There was no change to goodwill subsequent to this acquisition.

The gross value, accumulated amortization and carrying values of intangible assets were as follows (in thousands):

		As of January 31, 2018							As of January 31, 2017
	Estimated life (in years)	Gross Value		Accumulated Amortization			Carrying Value		Gross Value		Accumulated Amortization			Carrying Value
Developed technology	5	$	1,568	$	(630	)	$	938	$	815	$	(448	)	$	367
Trade name	5		262		(81	)		181		103		(56	)		47
Patents and licenses	3.8-7		714		(698	)		16		714		(689	)		25
User relationships	3.5		458		(458	)		—		458		(360	)		98
Non-compete agreement	2		—		—			—		118		(118	)		—
Total amortizable assets			3,002		(1,867	)		1,135		2,208		(1,671	)		537
In-process R&D	N/A		157		—			157		—		—			—
Total intangible assets		$	3,159	$	(1,867	)	$	1,292	$	2,208	$	(1,671	)	$	537

Amortization expense was $0.3 million, $0.3 million and $0.4 million in fiscal 2018, 2017 and 2016, respectively. At January 31, 2018, the estimated future amortization expense for intangible assets is as follows (in thousands):

Fiscal Years Ending January 31,
2019	$	372
2020		235
2021		186
2022		182
2023 and thereafter		160
Total	$	1,135

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Balance Sheet Components

12 Months Ended

Jan. 31, 2018

Balance Sheet Components [Abstract]

Balance Sheet Components

Note 6: Balance Sheet Components

The following sections and tables provide details of selected balance sheet items (in thousands):

Inventories

	As of January 31,
	2018		2017
Finished goods	$	5,517	$	4,847
Raw material		562		983
Total inventory	$	6,079	$	5,830

Deferred revenue

	As of January 31,
	2018		2017
Deferred revenue:
Subscription and services	$	14,568	$	13,770
Product and other		1,416		2,260
Total deferred revenue		15,984		16,030
Less: current deferred revenue		15,556		15,521
Noncurrent deferred revenue included in other long-term liabilities	$	428	$	509

Property and equipment, net

		As of January 31,
	Estimated Life (in years)	2018			2017
Computer equipment and software	3-4	$	7,180		$	5,605
Website development costs	2		2,579			1,973
Machinery and equipment	3-5		1,473			1,304
Office furniture and fixtures	5		88			62
Leasehold improvements	Shorter of estimated life or remaining lease term		651			518
Total property and equipment		$	11,971		$	9,462
Less: accumulated depreciation and amortization			(7,239	)		(5,286	)
Property and equipment, net		$	4,732		$	4,176

Depreciation and amortization of property and equipment totaled $2.0 million, $1.6 million and $1.4 million in fiscal 2018, 2017 and 2016, respectively.

Accrued expenses

	As of January 31,
	2018		2017
Accrued payroll and related expenses	$	5,423	$	4,546
Accrued regulatory fees and taxes		5,239		4,315
Accrued professional services		1,046		1,007
Other accrued expenses		3,069		1,711
Total accrued expenses	$	14,777	$	11,579

Stockholders' Equity

12 Months Ended

Jan. 31, 2018

Equity [Abstract]

Stockholders' Equity

Note 7: Stockholders’ Equity

Initial Public Offering. In July 2015, the Company completed its IPO in which the Company issued and sold 5.0 million shares of its common stock at a public offering price of $13.00 per share. The net proceeds received by the Company from the IPO were $56.9 million after deducting the underwriting discounts and commissions.

Convertible Preferred Stock. Upon the closing of the IPO in July 2015, all of the Company's outstanding Series Alpha preferred stock converted into 7.9 million shares of common stock on a 1:1 basis, all outstanding Series Alpha-1 preferred stock converted into approximately 0.5 million shares of common stock on a 1:1 basis, and all 0.2 million shares of outstanding Series Beta preferred stock converted into 0.5 million shares of common stock.

Secondary Offering. In January and March 2017, the Company completed two secondary offerings in which certain stockholders of the Company sold an aggregate of 3.3 million shares and 3.3 million shares, respectively, of the Company’s common stock at a public offering price of $8.65 per share and $8.85 per share, respectively, including 0.4 million shares sold upon the underwriters’ exercise of the overallotment option. The Company did not receive any of the proceeds from this offering.

Reverse Stock Split. Effective July 6, 2015, the Company completed a one-for-two reverse stock split of its outstanding common stock, convertible preferred stock, stock options, warrants to purchase preferred stock and warrants to purchase common stock, as approved by its Board of Directors. All shares and warrants and per share and warrant amounts set forth herein give effect to this reverse stock split.

Common Stock Reserved for Future Issuance

The Company had shares of common stock reserved for issuance as follows:

	As of January 31,
	2018		2017
Warrants to purchase common stock		4,881		97,931
Options to purchase common stock		1,801,232		1,777,365
Shares available for future issuance under stock plans		928,024		918,260
Shares reserved under ESPP		598,033		532,597
Restricted stock units outstanding		1,966,895		1,859,196
Total shares reserved for issuance		5,299,065		5,185,349

2015 Equity Incentive Plan (“2015 Plan”)

The Company’s 2015 Plan provides for the grant of incentive stock options to its employees and any of its subsidiary corporations’ employees, and for the grant of RSUs, non-statutory stock options, stock appreciation rights, restricted stock, performance units and performance shares to its employees, directors and consultants and its subsidiary corporations’ employees and consultants. The maximum aggregate number of shares that may be issued under the 2015 Plan is approximately 6.6 million.

Employee Stock Purchase Plan

The Company’s 2015 ESPP allows eligible employees to purchase shares of common stock at a discount through payroll deductions of up to 15% of their eligible compensation (subject to plan limitations). The ESPP provides for a 24-month offering period comprised of four purchase periods of approximately six months. Employees may purchase shares at 85% of the lower of the fair market value of the Company’s common stock as of the first date or the ending date of each six-month offering period. The offering periods are scheduled to start on the first trading day on or after March 15 and September 15 of each year, except for the first offering period, which commenced on the first trading day upon the completion of the Company’s IPO, or July 17, 2015, and ended on September 15, 2017. During fiscal 2018 and 2017, employees purchased 0.3 million and 0.2 million shares, respectively, at a weighted purchase price of $5.48 and $5.01 per share, respectively.

Stock Options

Options to purchase shares of common stock may be granted to employees, directors and consultants. These options vest from date of grant to up to five years and expire ten years from the date of grant. Options may be exercised anytime during their term in accordance with the vesting/exercise schedule specified in the recipient’s stock option agreement and in accordance with the plan provisions. Shares issued upon exercise prior to vesting, are subject to a right of repurchase, which lapses according to the original option vesting schedule.

Stock option activity for fiscal 2018 was as follows:

				Weighted Average		Weighted Average		Aggregate
	Number of			Exercise Price		Contractual Term		Intrinsic Value
	Shares			Per Share		(in years)		(in thousands)
Balance as of January 31, 2017		1,777,365		$	5.74		7.0	$	7,864
Granted		122,750		$	10.21
Exercised		(69,352	)		4.32
Canceled		(29,531	)		6.03
Balance as of January 31, 2018		1,801,232		$	6.09		6.2	$	8,270
Vested and exercisable - January 31, 2018		1,533,240		$	5.43		6.0	$	7,926
Vested and expected to vest - January 31, 2018		1,801,232		$	6.09		6.2	$	8,270

The aggregate intrinsic value of vested options exercised during fiscal 2018, 2017 and 2016 was $0.3 million, $1.3 million and $0.8 million, respectively. The weighted average grant date fair value of options granted during fiscal 2018, 2017 and 2016 was $4.81, zero and $6.92 per share, respectively. The Company did not grant stock options during fiscal 2017.

Restricted Stock Units

RSUs may be granted to employees, non-employee board members and consultants. These RSUs vest ratably over a period ranging from one to four years, and are subject to the participant’s continuing service to the Company over that period. Until vested, RSUs do not have the voting and dividend participation rights of common stock and the shares underlying the awards are not considered issued and outstanding.

RSU activity for fiscal 2018 and 2017 was as follows:

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016		1,056,905		$	9.60		1.4	$	7,176
Granted		1,596,750			7.25
Vested		(657,034	)		8.76
Canceled		(137,425	)		8.01
Balance as of January 31, 2017		1,859,196			7.65		1.4		17,941
Granted		1,222,605			10.17
Vested		(936,869	)		8.54
Canceled		(178,037	)		8.77
Balance as of January 31, 2018		1,966,895		$	8.85		1.4	$	20,158

Vested RSUs included shares of common stock that the Company withheld on behalf of certain employees to satisfy the minimum statutory tax withholding requirements, as defined by the Company. The Company withheld an aggregate amount of $2.4 million, $1.6 million and zero in fiscal 2018, 2017 and 2016, respectively, which were classified as financing cash outflows in the consolidated statements of cash flows. The Company canceled and returned these shares to the 2015 Plan, which are available under the plan terms for future issuance.

Stock-Based Compensation

12 Months Ended

Jan. 31, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

Note 8: Stock-Based Compensation

Total stock-based compensation recognized for stock-based awards in the consolidated statements of operations was as follows (in thousands):

	Fiscal Year Ended January 31,
	2018		2017		2016
Cost of revenue	$	1,102	$	1,026	$	437
Sales and marketing		1,818		1,438		611
Research and development		3,972		3,586		1,683
General and administrative		4,029		3,722		1,922
Total stock-based compensation expense	$	10,921	$	9,772	$	4,653

The income tax benefit related to stock-based compensation expense was zero for all periods presented due to a full valuation allowance on the Company's net deferred tax assets (see Note 9: Income Taxes below). As of January 31, 2018, there was $17.2 million of unrecognized stock-based compensation expense related to unvested RSUs, stock options and ESPP that will be recognized on a straight-line basis over the remaining weighted-average vesting period of approximately 3 years.

Fair value disclosures. The fair value of stock options granted and purchased under the Company's ESPP was estimated using the Black-Scholes option pricing model. The expected term of options granted to employees was based on the simplified method as the Company does not have sufficient historical exercise data, and the expected term of the ESPP was based on the contractual term. Expected stock price volatility was estimated by taking the average historic price volatility for industry peers based on daily price observations over a period equivalent to the expected term. Risk-free interest rate was based on the yields of U.S. Treasury securities with maturities similar to the expected term. Dividend yield was zero as the Company does not have any history of, nor plans to make, dividend payments.

The fair value of employee stock options was estimated using the Black–Scholes model with the following assumptions:

	Fiscal Year Ended January 31,
	2018	2017	2016
Stock Options:
Expected volatility	47%	N/A	54%-62%
Expected term (in years)	6.1	N/A	5.3-6.1
Risk-free interest rate	1.8%-2.1%	N/A	1.6%-1.9%
Dividend yield	—%	—%	—%

The Company did not grant any stock options during fiscal 2017. The fair value of the Company’s ESPP was estimated using the Black-Scholes model with the following assumptions:

	Fiscal Year Ended January 31,
	2018	2017	2016
ESPP:
Expected volatility	35%-41%	37%-50%	35%-44%
Expected term (in years)	0.5-2.0	0.5-2.0	0.5-2.2
Risk-free interest rate	0.9%-1.4%	0.5%-1.0%	0.1%-0.8%
Dividend yield	—%	—%	—%

Income Taxes

12 Months Ended

Jan. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Note 9: Income Taxes

Income tax expense differed from the amount computed by applying the federal blended statutory income tax rate of 32.9% to pretax loss as a result of the following (in thousands):

	Fiscal Year Ended January 31,
	2018			Rate			2017			Rate			2016			Rate
Federal tax at statutory rate	$	(4,316	)		33	%	$	(4,403	)		34	%	$	(4,787	)		34	%
Impact of U.S. tax law change		11,667			(89	)%		—			—			—			—
Change in valuation allowance		(6,786	)		52	%		4,881			(38	)%		4,502			(32	)%
Research and development credit		(1,080	)		8	%		(738	)		6	%		(273	)		2	%
State taxes		(396	)		3	%		(230	)		2	%		(261	)		2	%
Stock-based compensation		387			(3	)%		387			(3	)%		691			(5	)%
Permanent tax adjustment		527			(4	)%		103			(1	)%		128			(1	)%
Total	$	3			0	%	$	—			0	%	$	—			0	%

Income tax expense differs from the amount computed by applying the statutory federal income tax rate primarily as the result of changes in the valuation allowance and rate differential impact from the U.S. Tax Cuts and Jobs Act.

The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities related to the following (in thousands):

	As of January 31,
	2018			2017
Deferred tax assets:
Accruals and reserves	$	2,281		$	2,623
Stock-based compensation		1,030			1,887
Intangible assets amortization		61			101
Deferred revenue		125			182
Net operating loss carry forwards		22,047			28,120
Tax credit carryover		3,810			2,296
Gross deferred tax assets		29,354			35,209
Valuation allowance		(28,657	)		(34,900	)
Net deferred tax assets	$	697		$	309
Deferred tax liabilities:
Acquired intangible assets	$	(313	)	$	(183	)
Fixed assets depreciation		(384	)		(126	)
Gross deferred tax liabilities	$	(697	)	$	(309	)
Total deferred tax assets	$	—		$	—

On December 22, 2017, the Tax Cuts and Jobs Act (“Tax Act”) was enacted into law. The Tax Act includes a number of changes in existing tax law impacting businesses including, among other things, a permanent reduction in the corporate income tax rate from 35% to 21%, effective January 1, 2018. The Company revalued its net deferred tax asset at 21% in the period of enactment. This resulted in a reduction in the value of net deferred tax assets of approximately $11.4 million, which was offset by the change in valuation allowance, resulting in no impact to the Company's tax expense. The Company has completed its accounting for certain income tax effects of the Act, as it relates to its current structure, and does not expect these provisions to have a material effect on the Company’s future results of operations.

The Company has a Section 162(m) stock awards limitation on deferred tax assets of $0.9 million. Effective for tax years beginning on January 1, 2018 or later, which is considered fiscal 2019 for the Company, tax reform legislation modifies Section 162(m) rules to repeal the performance-based compensation and commission exceptions to the $1 million deduction limitation. However, written binding contracts in effect on November 2, 2017, including plans where the right to participate in the plan is part of a written contract with an executive, are grandfathered and not subject to limitation under Section 162(m). The Company believes some of its contracts will not be subject to limitation and will continue to monitor the deferred tax assets related to deferred compensation expense and share-based compensation expense on a going forward basis.

Management believes that, based on available evidence, both positive and negative, it is more likely than not that the deferred tax assets will not be utilized, such that a full valuation allowance has been recorded. The valuation allowance for deferred tax assets was $28.7 million, $34.9 million and $29.9 million as of January 31, 2018, 2017 and 2016, respectively. The net change in the total valuation allowance for fiscal 2018 and 2017 was a decrease of $6.2 million and an increase of $5.0 million, respectively.

As of January 31, 2018, the Company had approximately $83.0 million and $62.0 million of net operating loss (“NOL”) carryforwards available to offset future taxable income for both federal and state purposes, respectively. If not utilized, these available carryforward losses will expire in various amounts for federal and state tax purposes beginning in 2030. In addition, the Company had approximately $3.7 million and $3.4 million of federal and state research and development tax credits, respectively, available to offset future taxes. If not utilized, the available federal credits will begin to expire in 2030. California state research and development tax credits can be carried forward indefinitely.

On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Act. The Company has recognized the provisional tax impact related to the revaluation of deferred tax assets and liabilities to the extent identified. The ultimate impact may differ materially from these provisional amounts due to, among other things, additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be issued, and actions the Company may take as a result of the Tax Act.

Uncertain Tax Positions

The Company has unrecognized tax benefits (“UTBs”) of approximately $2.8 million as of January 31, 2018. Deferred tax assets associated with these UTBs are fully offset by a valuation allowance. If recognized, these UTBs would not affect the effective tax rate before consideration of the valuation allowance. The following table summarizes the activity related to UTBs (in thousands):

Balance at January 31, 2016	$	1,217
Increase related to prior year positions		—
Increase related to current year tax positions		598
Balance at January 31, 2017		1,815
Increase related to prior year positions		139
Increase related to current year tax positions		871
Balance at January 31, 2018	$	2,825

The UTBs reported above, if recognized, would not affect the effective tax rate before consideration of the valuation allowance. The Company had no interest or penalty accruals associated with uncertain tax benefits in its balance sheets and statements of operations for both fiscal 2018 and 2017. The Company does not have any tax positions for which it is reasonably possible the total amount of gross unrecognized benefits will increase or decrease within 12 months of the year ended January 31, 2018. Because the Company has net operating loss and credit carryforwards, there are open statutes of limitations in which federal, state and foreign taxing authorities may examine the Company’s tax returns for all years from 2006 through the current period.

Retirement Plan	12 Months Ended
Retirement Plan	Jan. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Retirement Plan	Note 10: Retirement Plan The Company offers a qualified 401(k) defined contribution plan to eligible full-time employees that provides for discretionary employer matching and profit-sharing contributions. Eligible employees may contribute up to a maximum of $18,000 per year, or $24,000 for employees over 50 years of age, and the Company matches 50% of the first 6% of each employee’s eligible compensation that is contributed to the 401(k) plan. Contributions made by the Company vest 100% upon contribution. The Company’s matching contributions to the plan, which are expensed immediately as compensation costs, were $0.5 million, $0.4 million and $0.3 million in fiscal 2018, 2017 and 2016, respectively.

Commitments and Contingencies

12 Months Ended

Jan. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 11: Commitments and Contingencies

Leases and Purchase Commitments. The Company’s principal commitments consist of obligations under enforceable and legally binding lease agreements for office space and data center facilities. Rent expense was $1.9 million, $2.0 million and $1.7 million for fiscal 2018, 2017 and 2016, respectively. As of January 31, 2018, future minimum rental commitments under non-cancelable operating leases were as follows (in thousands):

	Operating
Fiscal Year Ending January 31,	Leases
2019	$	1,937
2020		1,351
2021		570
2022		191
2023 and thereafter		212
Total	$	4,261

In October 2017, the Company entered into an office sublease agreement to lease approximately 33,400 rentable square feet of an office building located in Sunnyvale, California, the Company’s new corporate headquarters. The term of the sublease agreement expires in November 2019. The Company also extended the lease term of its facility in Newark, California through February 2023 and entered into a three-year agreement to lease space from a third-party data center hosting facility in Dallas, Texas. Lease payments associated with these agreements are included in the table above.

As of January 31, 2018, non-cancelable purchase commitments with the Company’s contract manufacturers were $3.3 million.

Legal Proceedings

In addition to the litigation matters described below, from time to time, the Company may be involved in a variety of other claims, lawsuits, investigations, and proceedings relating to contractual disputes, intellectual property rights, employment matters, regulatory compliance matters, and other litigation matters relating to various claims that arise in the normal course of business. Defending such proceedings is costly and can impose a significant burden on management and employees, the Company may receive unfavorable preliminary or interim rulings in the course of litigation, and there can be no assurances that favorable final outcomes will be obtained.

The Company determines whether an estimated loss from a contingency should be accrued by assessing whether a loss is deemed probable and can be reasonably estimated. The Company assesses its potential liability by analyzing specific litigation and regulatory matters using reasonably available information. The Company develops its views on estimated losses in consultation with inside and outside counsel, which involves a subjective analysis of potential results and outcomes, assuming various combinations of appropriate litigation and settlement strategies. Legal fees are expensed in the period in which they are incurred.

Other than the Oregon Tax litigation, Deep Green Wireless Litigation, Securities Litigation and Berks County Litigation, the Company is currently not a party to any material litigation or other proceedings, and as of January 31, 2018, the Company did not have any material accrued liabilities recorded for loss contingencies in its consolidated financial statements.

Oregon Tax Litigation

On August 30, 2016, the Oregon Department of Revenue (the “DOR”) issued tax assessments against the Company for the Oregon Emergency Communications Tax (the “Tax”), which the DOR alleges Ooma should have collected from its subscribers in Oregon and remitted to the DOR during the period starting on January 1, 2013 and ending on March 31, 2016 (collectively, the “Assessments”). On November 28, 2016, the Company filed a complaint in the Oregon Tax Court, asserting that the Assessments against the Company is in violation of applicable Oregon law and are barred by the United States Constitution, and asking the Oregon Tax Court to abate the Assessments in full (the “Complaint”, and such dispute, the “Oregon Tax Litigation”). On February 10, 2017, the DOR filed an answer to the Complaint, and during April 2017, the Company voluntarily participated in an informal discovery process by providing certain information and documents to the DOR. The Company filed a motion for summary judgment on September 29, 2017, and on December 13, 2017 the Court heard oral arguments from the parties regarding such motion. The Company believes that the Commerce Clause of the United States Constitution bars the application of the Tax to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Oregon, and therefore the application of the Tax against Ooma and the Assessments are barred by the United States Constitution. The Company will continue to vigorously litigate the Complaint in pursuit of the full abatement of the Assessments. However, litigation is unpredictable and there can be no assurances that the Company will obtain a favorable final outcome or that it will be able to avoid unfavorable preliminary or interim rulings in the course of litigation that may significantly add to the expense of its defense and could result in substantial costs and diversion of resources.

Based on the Company’s current knowledge, the Company has determined that the amount of any material loss or range of material losses that is reasonably possible to result from the Oregon Tax Litigation is not estimable.

Deep Green Wireless Litigation

On June 8, 2016, plaintiff Deep Green Wireless LLC filed a complaint in the U.S. District Court for the Eastern District of Texas against Ooma, Inc., alleging infringement of U.S. Patent No. RE42,714 (the “Deep Green Wireless Patent”, and such litigation, the “Deep Green Wireless Litigation”). The complaint seeks unspecified monetary damages, costs, attorneys’ fees and other appropriate relief. On July 29, 2016, the Company filed its answer, affirmative defenses and counterclaims, on August 2, 2016 the Company filed a motion to transfer the case to the Northern District of California, and on February 21, 2017 magistrate judge Roy S. Payne granted the Company’s motion to transfer the case. District Court Judge Jeffrey S. White of the Northern District of California set the initial case management conference for July 28, 2017. On June 8, 2017, the Company filed a motion with the United States Patent Trial and Appeal Board for inter parties review of the Deep Green Wireless Patent. Based upon the Company’s investigation, the Company does not believe that its products infringe any valid or enforceable claim of the aforementioned patent, and the Company plans to continue vigorously defending against the plaintiff’s claim. However, litigation is unpredictable and there can be no assurances that the Company will obtain a favorable final outcome or that it will be able to avoid unfavorable preliminary or interim rulings in the course of litigation that may significantly add to the expense of its defense and could result in substantial costs and diversion of resources.

Based on the Company’s current knowledge, the Company has determined that the amount of any material loss or range of any losses that is reasonably possible to result from the Deep Green Wireless Litigation is not estimable.

Securities Litigation

On January 14, 2016, Michael Barnett filed a purported stockholder class action in the San Mateo County Superior Court of the State of California (Case No. CIV536959) against the Company, certain of its officers and directors, and certain of the underwriters of our IPO on July 17, 2015. Since that time two additional purported class actions making substantially the same allegations against the same defendants were filed, and on May 18, 2016, all three complaints were combined into a “consolidated complaint” filed in the same court (the “Securities Litigation”). The consolidated complaint purports to be brought on behalf of all persons who purchased shares of common stock in our IPO in reliance upon the Registration Statement and Prospectus the Company filed with the SEC. The consolidated complaint alleges that the Company and the other defendants violated the Securities Act of 1933, as amended (the “Securities Act”) by issuing the Registration Statement and Prospectus, which the plaintiffs allege contained material misstatements and omissions in violation of Sections 11, 12(a)(2) and 15 of the Securities Act. The plaintiffs seek class certification, compensatory damages, attorneys’ fees and costs, rescission or a rescissory measure of damages, equitable and/or injunctive relief, and such other relief as the court may deem proper.

On July 1, 2016, the Company filed its answer to the complaint, on August 26, 2016 the Company filed a motion for judgment on the pleadings, and on January 5, 2017, the Superior Court issued an order in response to such motion, granting the Company’s motion to dismiss the claims pursuant to Sections 12(a)(2) and 15 of the Securities Act, with leave to amend, and denying the Company’s motion to dismiss the claims pursuant to Section 11 of the Securities Act. On August 28, 2017, the plaintiffs filed an amended consolidated complaint, which, among other things, amended the claims based on Sections 12(a)(2) and 15 of the Securities Act (The “Section 12 and 15 Claims”), and on October 17, 2017, Ooma filed (i) a motion for judgment on the pleadings with regard to the Section 12 and 15 Claims and (ii) a motion to stay the case pending the United States Supreme Court’s decision in Cyan v. Beaver Cnty. Emp. Ret.‘ Fund, which takes up the issue of whether the Superior Court has subject matter jurisdiction to hear claims brought under the Securities Act. On November 29, 2017, the Superior Court dismissed the Section 12 and 15 Claims with prejudice, but denied the Company’s motions.

On January 11, 2018, Ooma filed a petition for writ of mandate with the California Court of Appeal seeking to overturn the Superior Court’s denial of the motion to stay, and on February 21, 2018, the writ was denied. On March 20, 2018, the United States Supreme Court published its decision in the Cyan case, holding that state courts have subject matter jurisdiction to hear claims brought under the Securities Act, such as the claims alleging violations of Section 11 of the Securities Act (the only remaining claims in the Securities Litigation) brought against the Company in the Superior Court.

The Company believes the plaintiffs’ claims are without merit and the Company is vigorously defending against the Securities Litigation and will continue to do so. However, litigation is unpredictable and there can be no assurances that the Company will obtain a favorable final outcome or that it will be able to avoid unfavorable preliminary or interim rulings in the course of litigation that may significantly add to the expense of its defense and could result in substantial costs and diversion of resources.

Based on the Company’s current knowledge, the Company has determined that the amount of any material loss or range of any losses that is reasonably possible to result from the Securities Litigation is not estimable.

Berks County Litigation

On January 21, 2016, the County of Berks, Pennsylvania filed a lawsuit in the Berks County Court of Common Pleas naming the Company and 113 other telephone service providers as defendants (the “Berks County Litigation”), alleging breach of fiduciary duty, fraud, and negligent misrepresentation in connection with alleged violations of the Pennsylvania 911 Emergency Communication Services Act, 35 Pa.C.S.A. §5301 et seq. (“PA 911 Act”) for failure to collect from subscribers and remit certain fees pursuant to the PA 911 Act. The plaintiff seeks a declaratory judgment that the Company must comply with the PA 911 Act, compensatory and punitive damages, attorneys’ fees and costs, equitable and/or injunctive relief and such other relief as the court may deem proper. On May 17, 2016, the court issued an order overruling the defendants’ joint preliminary objections, which are, in essence, the Pennsylvania equivalent of a motion to dismiss. Notwithstanding such adverse order, the Company believes that the Commerce Clause of the United States Constitution bars the application of the PA 911 Act to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Pennsylvania, and therefore the plaintiff’s claims are without merit. The Company intends to continue vigorously defending this lawsuit. However, litigation is unpredictable and there can be no assurances that the Company will obtain a favorable final outcome or that it will be able to avoid unfavorable preliminary or interim rulings in the course of litigation that may significantly add to the expense of its defense and could result in substantial costs and diversion of resources.

Based on the Company’s current knowledge, the Company has determined that the amount of any material loss or range of any losses that is reasonably possible to result from the Berks County Litigation is not estimable.

Indemnification

The Company enters into standard indemnification arrangements in the ordinary course of business. Pursuant to these arrangements, the Company indemnifies, holds harmless and agrees to reimburse the indemnified parties for losses suffered or incurred by the indemnified party, in connection with any trade secret, copyright, patent or other intellectual property infringement claim by any third party with respect to the Company’s technology. The term of these indemnification agreements is generally perpetual. The maximum potential amount of future payments the Company could be required to make under these agreements is not determinable because it involves claims that may be made against the Company in the future, but have not yet been made.

The Company has entered into indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers, other than liabilities arising from willful misconduct of the individual. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has director and officer insurance coverage that reduces the Company’s exposure and enables the Company to recover a portion of any future amounts paid.

To date the Company has not incurred costs to defend lawsuits or settle claims related to these indemnification agreements. No liability associated with such indemnifications has been recorded to date.

Acquisitions and Divestitures	12 Months Ended
Acquisitions and Divestitures	Jan. 31, 2018
Business Acquisitions And Divestitures [Abstract]
Acquisitions and Divestitures	Note 12: Acquisitions and Divestitures Acquisition of Butterfleye, Inc. On December 14, 2017, the Company completed its acquisition of Butterfleye, Inc., a privately-held company that offers intelligent, wire-free security cameras. The fair value of consideration transferred included $1.5 million cash as well as deferred earnout payments contingent upon the achievement of certain performance targets during the Company’s fiscal 2019. The fair market value and gross amount of the earn-out payments were approximately $0.3 million and $0.9 million, respectively (see Note 4: Fair Value Measurements above for additional information regarding fair value). The final purchase price allocation included identifiable intangible assets of approximately $1.1 million, net liabilities assumed of approximately $0.1 million and residual goodwill of approximately $0.8 million, based on the best estimates of management. See Note 5: Goodwill and Acquired Intangible Assets above. Acquisition-related transaction costs charged to expense were not material. The goodwill recognized was attributable primarily to expected synergies in the acquired technologies that may be leveraged by the Company in future home security product offerings. Goodwill is not expected to be deductible for U.S. income tax purposes. The operating results of the acquired company have been included in the Company's consolidated financial statements from the date of acquisition. Actual and pro forma results of operations for the Butterfleye acquisition have not been presented because it does not have a material impact on the Company's consolidated results of operations. Sale of Business Promoter On August 15, 2017, the Company completed the sale of its Business Promoter service to Xedia Networks, Inc. The Company did not receive any cash proceeds nor did it recognize any losses or gains from this transaction. The Company is entitled to receive a quarterly earn-out for the next five years up to a maximum of $4.5 million, subject to certain quarterly thresholds. Through January 31, 2018, the Company recorded earn-outs of approximately $0.2 million as a reduction to general and administrative expense in its consolidated statement of operations.

Net Loss Per Share

12 Months Ended

Jan. 31, 2018

Earnings Per Share [Abstract]

Net Loss Per Share

Note 13: Net Loss Per Share

Basic and diluted net loss per share of common stock is calculated by dividing the net loss allocable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share of common stock is the same as basic net loss per share because the effects of potentially dilutive securities are antidilutive because the Company reported net losses for all periods presented.

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data):

	Fiscal Year Ended January 31,
	2018			2017			2016
Numerator
Net loss	$	(13,121	)	$	(12,949	)	$	(14,052	)
Denominator
Weighted-average common shares		18,570,128			17,490,448			10,173,095
Basic and diluted net loss per share	$	(0.71	)	$	(0.74	)	$	(1.38	)

Potentially dilutive securities of approximately 4.1 million, 4.1 million and 3.8 million were excluded from the computation of diluted net loss per share for fiscal 2018, 2017 and 2016, respectively, and included the Company’s RSUs, stock options and shares to be purchased under the ESPP.

Related Party Transaction	12 Months Ended
Related Party Transaction	Jan. 31, 2018
Related Party Transactions [Abstract]
Related Party Transaction	Note 14: Related Party Transactions Beginning fiscal 2017, one of the members of the Company’s board of directors has been affiliated with a professional firm that provided public relations services to the Company. The Company incurred expenses of approximately $0.2 million and $0.3 million in fiscal 2018 and 2017, respectively, for the services provided by the firm. In October 2017, the Company entered into an office sublease agreement with Fiserv Solutions, LLC (“Fiserv”) to lease approximately 33,400 rentable square feet of an office building located in Sunnyvale, California, the Company’s new corporate headquarters. One of the members of the Company’s board of directors is also a current member of Fiserv’s board of directors. The Company incurred rent expense of approximately $0.2 million in fiscal 2018 under this sublease agreement.

Subsequent Events	12 Months Ended
Subsequent Events	Jan. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 15: Subsequent Events On March 2, 2018, the Company entered into a definitive agreement to acquire Voxter Communications Inc., a privately-held provider of UCaaS solutions for mid-market and enterprise businesses. The aggregate purchase price consisted of cash and equity consideration of approximately $3.6 million and deferred earnout payments contingent upon the achievement of certain business milestones. The transaction closed on March 12, 2018 and the Company is determining the fair value of assets acquired and liabilities assumed necessary to develop the purchase price allocation.

Significant Accounting Policies (Policies)

12 Months Ended

Jan. 31, 2018

Accounting Policies [Abstract]

Principles of Presentation and Consolidation

Principles of Presentation and Consolidation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated upon consolidation. In the opinion of the Company’s management, the consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation.

Fiscal Year

Fiscal Year. The Company’s fiscal year ends on January 31. References to fiscal 2018, fiscal 2017 and fiscal 2016 refer to the fiscal years ended January 31, 2018, January 31, 2017 and January 31, 2016, respectively.

Use of Estimates

Use of Estimates. The preparation of the Company’s financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates.

Comprehensive Loss

Comprehensive Loss. For all periods presented, comprehensive loss approximated net loss in the consolidated statements of operations. Therefore, the consolidated statements of comprehensive loss have been omitted.

Revenue Recognition

The Company recognizes revenue when the following criteria are met:

•

persuasive evidence of an arrangement exists;

•

the service has been or is being provided to the customer, and product delivery has occurred;

•

collection of the fees is reasonably assured; and

•

the amount of fees to be paid by the customer is fixed or determinable.

Subscription and Service Revenue

Product and Other Revenue

Multiple-element Arrangements

Deferred Revenue

Sales Reserves

Shipping and Handling Costs

Cash Equivalents and Short-term investments

Fair Value of Financial Instruments

▪

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets.

▪

Level 2: Observable prices based on inputs not quoted in active markets, but are corroborated by market data.

▪

Level 3: Unobservable inputs that are supported by little or no market activity

Segment Reporting

Substantially all revenue, based on customer billing addresses, was derived from customers in the United States for all periods presented.

All of the Company’s long-lived assets were attributable to operations in the United States for all periods presented.

Concentration of Credit Risk

Customers who represented 10% or more of the Company's net accounts receivable balance were as follows:

	As of January 31,
	2018			2017
Customer A		10	%	*
Customer B	*				11	%

*	Represented less than 10% accounts receivable, net at the end of respective periods.

No single customer accounted for 10% or more of the Company’s consolidated revenues in fiscal 2018, 2017 and 2016.

Accounts Receivable Allowances

Inventories

Deferred Inventory Costs

Website Development Costs

Property and Equipment

Goodwill and Intangible Assets

Impairment of Long-Lived Assets

Research and Development

Advertising

Stock-Based Compensation

Income Taxes

Foreign Currency

Adopted Accounting Standards

Going Concern. The Company adopted ASU 2014-15, Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern in the first quarter of fiscal 2018. The new standard provides guidance around management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The adoption of this standard had no impact on the Company’s consolidated financial statements.

Stock Compensation. The Company early adopted ASU 2016-09, Stock Compensation (Topic 718), Scope of Modification Accounting in the third quarter of fiscal 2018. The updated standard provides guidance on the changes to the terms or conditions of a share-based payment award that require an entity to apply modification accounting under Topic 718. The adoption of this standard had no impact on the Company’s consolidated financial statements.

Accounting Standards Not Yet Adopted

Revenue Recognition and Sales Commissions

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which replaces existing revenue recognition guidance (Topic 605) with a comprehensive revenue measurement and recognition standard and expanded disclosure requirements. Topic 606 also includes Subtopic 340-40, Other Assets and Deferred Costs – Contracts with Customers, which requires the deferral of incremental costs to acquire customer contracts, including sales commissions. Collectively, the Company refers to Topic 606 and Subtopic 340-40 as the “new standard.”

The new standard permits adoption either by using (i) a full retrospective method to restate each prior reporting period presented or (ii) a modified retrospective method with the cumulative effect of initially applying the new standard recognized at the date of initial application. The Company adopted the new standard effective February 1, 2018 using the modified retrospective method only with respect to contracts that were not completed as of February 1, 2018. The Company’s decision was based on a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, and the Company’s ability to accumulate and analyze the information necessary to assess the cumulative effect of the new standard through February 1, 2018. In preparation for adoption, the Company has implemented additional accounting reporting processes, transitional internal controls and has reached conclusions on key accounting considerations related to the new standard.

The new standard impacts the way the Company recognizes its product revenue for sales made through its channel partners, whereby revenue will be recognized upon the sale to the partners (sell-in basis) instead of the Company’s current recognition upon resale by the partners to the end customers (sell-through basis). Estimates for expected product returns, customer credits and other sales incentives must be made at the time product is shipped, which will require significant management judgment. As a result of adopting the standard, the fiscal 2019 opening balance of deferred product revenue associated with shipments made to channel partners is expected to decrease by approximately $1.4 million, with corresponding adjustments to deferred inventory costs and other related accounts, resulting in a one-time net increase to accumulated deficit of approximately $0.3 million.

The adoption of the new standard will also change the Company’s treatment of sales commissions. Beginning with the first quarter of fiscal 2019, the Company will capitalize its incremental commission costs of acquiring customer contracts, which will result in a material increase to the Company’s assets on the consolidated balance sheet. Previously, sales commissions were expensed as incurred. Deferred commissions will be amortized on a systematic basis to sales and marketing expense over an estimated customer life of five years, which was calculated based on both qualitative and quantitative factors, such as product life cycles and customer attrition. As a result of adopting the standard, the fiscal 2019 opening balance of deferred commissions related to contracts that were not completed as of February 1, 2018 is expected to be immaterial.

The new standard significantly enhances required disclosures regarding revenue, commissions, and related assets and liabilities beginning in the Company’s Form 10-Q for the period ending April 30, 2018. The adoption of the new standard is not expected to have a significant impact to income taxes and will have no impact on net cash provided by or used in operating, investing and financing activities in the consolidated statements of cash flows.

Leases. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) that requires assets and liabilities arising from leases, including operating leases, to be recognized on the balance sheet. ASU 2016-02 will become effective for the Company in the first quarter of fiscal 2020, and requires adoption using a modified retrospective approach. Although the Company is currently evaluating the impact this standard will have on its consolidated financial statements and related disclosures, the Company expects that its operating lease commitments will be subject to the new standard and recognized as operating lease liabilities and right-of-use assets upon adoption.

Goodwill. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350) that will eliminate the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, impairment charge will be based on the excess of a reporting unit's carrying amount over its fair value. The guidance is effective for the Company in the first quarter of fiscal 2023. Early adoption is permitted. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements, absent any goodwill impairment.

Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2018

Accounting Policies [Abstract]

Concentration of Net Accounts Receivable Balance

Customers who represented 10% or more of the Company's net accounts receivable balance were as follows:

	As of January 31,
	2018			2017
Customer A		10	%	*
Customer B	*				11	%

*	Represented less than 10% accounts receivable, net at the end of respective periods.

Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities at Fair Value

The Company’s financial assets and liabilities that are measured at fair value on a recurring basis by level within the fair value hierarchy were as follows (in thousands):

	Balance as of January 31, 2018								Balance as of January 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Total
Assets:
Cash and cash equivalents:
Money market funds	$	554	$	—	$	—	$	554	$	951	$	—	$	951
Commercial paper		—		2,844		—		2,844		—		—		—
Total cash equivalents	$	554	$	2,844	$	—	$	3,398	$	951	$	—	$	951
Cash								1,085						3,039
Total cash and cash equivalents							$	4,483					$	3,990

Short-term investments:
U.S. government securities	$	20,867	$	—	$	—	$	20,867	$	17,798	$	—	$	17,798
Corporate debt securities		—		13,895		—		13,895		—		18,436		18,436
Commercial paper		—		9,272		—		9,272		—		5,386		5,386
U.S. agency securities		—		1,996		—		1,996		—		5,777		5,777
Asset-backed securities		—		1,277		—		1,277		—		1,814		1,814
Total short-term investments	$	20,867	$	26,440	$	—	$	47,307	$	17,798	$	31,413	$	49,211

Liabilities:
Contingent consideration					$	311	$	311
Total liabilities	$	—	$	—	$	311	$	311

Schedule of Short-term Investments by Contractual Maturities

The following table classifies the Company’s short-term investments by contractual maturities (in thousands):

	As of January 31, 2018				As of January 31, 2017
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	43,227	$	43,172	$	44,806	$	44,794
Over one year and less than two years		4,164		4,135		4,416		4,417
Total	$	47,391	$	47,307	$	49,222	$	49,211

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Carrying Value of Intangible Assets Other than Goodwill

The gross value, accumulated amortization and carrying values of intangible assets were as follows (in thousands):

		As of January 31, 2018							As of January 31, 2017
	Estimated life (in years)	Gross Value		Accumulated Amortization			Carrying Value		Gross Value		Accumulated Amortization			Carrying Value
Developed technology	5	$	1,568	$	(630	)	$	938	$	815	$	(448	)	$	367
Trade name	5		262		(81	)		181		103		(56	)		47
Patents and licenses	3.8-7		714		(698	)		16		714		(689	)		25
User relationships	3.5		458		(458	)		—		458		(360	)		98
Non-compete agreement	2		—		—			—		118		(118	)		—
Total amortizable assets			3,002		(1,867	)		1,135		2,208		(1,671	)		537
In-process R&D	N/A		157		—			157		—		—			—
Total intangible assets		$	3,159	$	(1,867	)	$	1,292	$	2,208	$	(1,671	)	$	537

Schedule of Estimated Future Amortization Expense

Fiscal Years Ending January 31,
2019	$	372
2020		235
2021		186
2022		182
2023 and thereafter		160
Total	$	1,135

Balance Sheet Components (Tables)

12 Months Ended

Jan. 31, 2018

Balance Sheet Components [Abstract]

Components of Inventories

The following sections and tables provide details of selected balance sheet items (in thousands):

Inventories

	As of January 31,
	2018		2017
Finished goods	$	5,517	$	4,847
Raw material		562		983
Total inventory	$	6,079	$	5,830

Components of Deferred Revenue

Deferred revenue

	As of January 31,
	2018		2017
Deferred revenue:
Subscription and services	$	14,568	$	13,770
Product and other		1,416		2,260
Total deferred revenue		15,984		16,030
Less: current deferred revenue		15,556		15,521
Noncurrent deferred revenue included in other long-term liabilities	$	428	$	509

Components of Property and Equipment, Net

Property and equipment, net

		As of January 31,
	Estimated Life (in years)	2018			2017
Computer equipment and software	3-4	$	7,180		$	5,605
Website development costs	2		2,579			1,973
Machinery and equipment	3-5		1,473			1,304
Office furniture and fixtures	5		88			62
Leasehold improvements	Shorter of estimated life or remaining lease term		651			518
Total property and equipment		$	11,971		$	9,462
Less: accumulated depreciation and amortization			(7,239	)		(5,286	)
Property and equipment, net		$	4,732		$	4,176

Components of Accrued Expenses

Accrued expenses

	As of January 31,
	2018		2017
Accrued payroll and related expenses	$	5,423	$	4,546
Accrued regulatory fees and taxes		5,239		4,315
Accrued professional services		1,046		1,007
Other accrued expenses		3,069		1,711
Total accrued expenses	$	14,777	$	11,579

Stockholders' Equity (Tables)

12 Months Ended

Jan. 31, 2018

Equity [Abstract]

Schedule of Common Stock Reserved for Issuance

The Company had shares of common stock reserved for issuance as follows:

	As of January 31,
	2018		2017
Warrants to purchase common stock		4,881		97,931
Options to purchase common stock		1,801,232		1,777,365
Shares available for future issuance under stock plans		928,024		918,260
Shares reserved under ESPP		598,033		532,597
Restricted stock units outstanding		1,966,895		1,859,196
Total shares reserved for issuance		5,299,065		5,185,349

Summarizes of Stock Option Activities

Stock option activity for fiscal 2018 was as follows:

				Weighted Average		Weighted Average		Aggregate
	Number of			Exercise Price		Contractual Term		Intrinsic Value
	Shares			Per Share		(in years)		(in thousands)
Balance as of January 31, 2017		1,777,365		$	5.74		7.0	$	7,864
Granted		122,750		$	10.21
Exercised		(69,352	)		4.32
Canceled		(29,531	)		6.03
Balance as of January 31, 2018		1,801,232		$	6.09		6.2	$	8,270
Vested and exercisable - January 31, 2018		1,533,240		$	5.43		6.0	$	7,926
Vested and expected to vest - January 31, 2018		1,801,232		$	6.09		6.2	$	8,270

Summarizes of Restricted Stock Units Activities

RSU activity for fiscal 2018 and 2017 was as follows:

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016		1,056,905		$	9.60		1.4	$	7,176
Granted		1,596,750			7.25
Vested		(657,034	)		8.76
Canceled		(137,425	)		8.01
Balance as of January 31, 2017		1,859,196			7.65		1.4		17,941
Granted		1,222,605			10.17
Vested		(936,869	)		8.54
Canceled		(178,037	)		8.77
Balance as of January 31, 2018		1,966,895		$	8.85		1.4	$	20,158

Stock-Based Compensation (Tables)

12 Months Ended

Jan. 31, 2018

Total Stock-Based Compensation Recognized for Stock-Based Awards in Condensed Consolidated Statements of Operations

Total stock-based compensation recognized for stock-based awards in the consolidated statements of operations was as follows (in thousands):

	Fiscal Year Ended January 31,
	2018		2017		2016
Cost of revenue	$	1,102	$	1,026	$	437
Sales and marketing		1,818		1,438		611
Research and development		3,972		3,586		1,683
General and administrative		4,029		3,722		1,922
Total stock-based compensation expense	$	10,921	$	9,772	$	4,653

ESPP

Stock Options Valuation Assumptions Used to Calculate the Fair Value of Warrants

The Company did not grant any stock options during fiscal 2017. The fair value of the Company’s ESPP was estimated using the Black-Scholes model with the following assumptions:

	Fiscal Year Ended January 31,
	2018	2017	2016
ESPP:
Expected volatility	35%-41%	37%-50%	35%-44%
Expected term (in years)	0.5-2.0	0.5-2.0	0.5-2.2
Risk-free interest rate	0.9%-1.4%	0.5%-1.0%	0.1%-0.8%
Dividend yield	—%	—%	—%

Stock Options

Stock Options Valuation Assumptions Used to Calculate the Fair Value of Warrants

The fair value of employee stock options was estimated using the Black–Scholes model with the following assumptions:

	Fiscal Year Ended January 31,
	2018	2017	2016
Stock Options:
Expected volatility	47%	N/A	54%-62%
Expected term (in years)	6.1	N/A	5.3-6.1
Risk-free interest rate	1.8%-2.1%	N/A	1.6%-1.9%
Dividend yield	—%	—%	—%

Income Taxes (Tables)

12 Months Ended

Jan. 31, 2018

Income Tax Disclosure [Abstract]

Reconciliation of Income Tax Expense

Income tax expense differed from the amount computed by applying the federal blended statutory income tax rate of 32.9% to pretax loss as a result of the following (in thousands):

	Fiscal Year Ended January 31,
	2018			Rate			2017			Rate			2016			Rate
Federal tax at statutory rate	$	(4,316	)		33	%	$	(4,403	)		34	%	$	(4,787	)		34	%
Impact of U.S. tax law change		11,667			(89	)%		—			—			—			—
Change in valuation allowance		(6,786	)		52	%		4,881			(38	)%		4,502			(32	)%
Research and development credit		(1,080	)		8	%		(738	)		6	%		(273	)		2	%
State taxes		(396	)		3	%		(230	)		2	%		(261	)		2	%
Stock-based compensation		387			(3	)%		387			(3	)%		691			(5	)%
Permanent tax adjustment		527			(4	)%		103			(1	)%		128			(1	)%
Total	$	3			0	%	$	—			0	%	$	—			0	%

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities related to the following (in thousands):

	As of January 31,
	2018			2017
Deferred tax assets:
Accruals and reserves	$	2,281		$	2,623
Stock-based compensation		1,030			1,887
Intangible assets amortization		61			101
Deferred revenue		125			182
Net operating loss carry forwards		22,047			28,120
Tax credit carryover		3,810			2,296
Gross deferred tax assets		29,354			35,209
Valuation allowance		(28,657	)		(34,900	)
Net deferred tax assets	$	697		$	309
Deferred tax liabilities:
Acquired intangible assets	$	(313	)	$	(183	)
Fixed assets depreciation		(384	)		(126	)
Gross deferred tax liabilities	$	(697	)	$	(309	)
Total deferred tax assets	$	—		$	—

Summary of Activity Related to UTBs

The following table summarizes the activity related to UTBs (in thousands):

Balance at January 31, 2016	$	1,217
Increase related to prior year positions		—
Increase related to current year tax positions		598
Balance at January 31, 2017		1,815
Increase related to prior year positions		139
Increase related to current year tax positions		871
Balance at January 31, 2018	$	2,825

Commitments and Contingencies (Tables)

12 Months Ended

Jan. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Minimum Rental Commitments under Non-Cancelable Operating Leases

As of January 31, 2018, future minimum rental commitments under non-cancelable operating leases were as follows (in thousands):

	Operating
Fiscal Year Ending January 31,	Leases
2019	$	1,937
2020		1,351
2021		570
2022		191
2023 and thereafter		212
Total	$	4,261

Net Loss Per Share (Tables)

12 Months Ended

Jan. 31, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss Per Share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data):

	Fiscal Year Ended January 31,
	2018			2017			2016
Numerator
Net loss	$	(13,121	)	$	(12,949	)	$	(14,052	)
Denominator
Weighted-average common shares		18,570,128			17,490,448			10,173,095
Basic and diluted net loss per share	$	(0.71	)	$	(0.74	)	$	(1.38	)

Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Jan. 31, 2018 USD ($) Segment Customer	Jan. 31, 2017 USD ($) Customer	Jan. 31, 2016 USD ($) Customer
Significant Accounting Policies [Line Items]
Reportable segments \| Segment	1
Number of customer accounted for 10% or more of consolidated revenues \| Customer	0	0	0
Allowances for doubtful accounts and returns	$ 400,000	$ 200,000
Impairment of goodwill	0	0	$ 0
Impairment of long-lived assets	0	0	0
Advertising costs	300,000	300,000	500,000
Interest expense or penalties related to unrecognized tax benefits	0	0	0
Sales and marketing
Significant Accounting Policies [Line Items]
Advertising costs	$ 14,400,000	16,500,000	13,900,000
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment	3 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment	5 years
Website Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment	2 years
Development costs capitalized	$ 600,000	$ 400,000	$ 500,000

Significant Accounting Policies - Concentration of Net Accounts Receivable Balance (Details) - Accounts Receivable - Customer Concentration Risk	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Customer A
Concentration Risk [Line Items]
Concentration risk percentage	10.00%
Customer B
Concentration Risk [Line Items]
Concentration risk percentage		11.00%

Recent Accounting Standards - Additional Information (Details) - ASU 2014-09 - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Deferred Commissions \| Sales and marketing
Significant Accounting Policies [Line Items]
Estimated customer life		5 years
Scenario, Forecast
Significant Accounting Policies [Line Items]
Decrease in deferred product revenue	$ 1.4
Net increase to accumulated deficit due to adoption of new standard	$ 0.3

Fair Value Measurements - Schedule of Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Assets:
Total cash and cash equivalents	$ 4,483	$ 3,990
Total short-term investments	47,307	49,211
Liabilities:
Total liabilities	311
Commercial Paper
Assets:
Total short-term investments	9,272	5,386
U.S. Government Securities
Assets:
Total short-term investments	20,867	17,798
Corporate Debt Securities
Assets:
Total short-term investments	13,895	18,436
U.S. Agency Securities
Assets:
Total short-term investments	1,996	5,777
Asset-backed Securities
Assets:
Total short-term investments	1,277	1,814
Cash Equivalents
Assets:
Total cash and cash equivalents	3,398	951
Cash Equivalents \| Commercial Paper
Assets:
Total cash and cash equivalents	2,844
Cash Equivalents \| Money Market Funds
Assets:
Total cash and cash equivalents	554	951
Cash
Assets:
Total cash and cash equivalents	1,085	3,039
Contingent Consideration
Liabilities:
Total liabilities	311
Level 1
Assets:
Total short-term investments	20,867	17,798
Level 1 \| U.S. Government Securities
Assets:
Total short-term investments	20,867	17,798
Level 1 \| Cash Equivalents
Assets:
Total cash and cash equivalents	554	951
Level 1 \| Cash Equivalents \| Money Market Funds
Assets:
Total cash and cash equivalents	554	951
Level 2
Assets:
Total short-term investments	26,440	31,413
Level 2 \| Commercial Paper
Assets:
Total short-term investments	9,272	5,386
Level 2 \| Corporate Debt Securities
Assets:
Total short-term investments	13,895	18,436
Level 2 \| U.S. Agency Securities
Assets:
Total short-term investments	1,996	5,777
Level 2 \| Asset-backed Securities
Assets:
Total short-term investments	1,277	$ 1,814
Level 2 \| Cash Equivalents
Assets:
Total cash and cash equivalents	2,844
Level 2 \| Cash Equivalents \| Commercial Paper
Assets:
Total cash and cash equivalents	2,844
Level 3
Liabilities:
Total liabilities	311
Level 3 \| Contingent Consideration
Liabilities:
Total liabilities	$ 311

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Fair Value Disclosures [Abstract]
Financial assets, level 2 to level 1 transfers, amount	$ 0	$ 0
Financial assets, level 1 to level 2 transfers, amount	0	0
Financial liabilities, level 2 to level 1 transfers, amount	0	0
Financial liabilities, level 1 to level 2 transfers, amount	0	$ 0
Investments other-than-temporarily impaired	0
Acquisition-related contingent consideration reduction in expense	$ 0

Fair Value Measurements - Schedule of Short-term Investments by Contractual Maturities (Details) - Short-term Investments - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
One year or less, amortized cost	$ 43,227	$ 44,806
Over one year and less than two years, amortized cost	4,164	4,416
Short-term Investments, Amortized Cost	47,391	49,222
One year or less, fair value	43,172	44,794
Over one year and less than two years, fair value	4,135	4,417
Short-term Investments, Fair Value	$ 47,307	$ 49,211

Goodwill and Acquired Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016	Dec. 14, 2017
Finite Lived Intangible Assets [Line Items]
Goodwill		$ 1,947	$ 1,117
Amortization expense		$ 313	$ 348	$ 393
Butterfleye, Inc.
Finite Lived Intangible Assets [Line Items]
Goodwill					$ 800
Intangible assets recognized from acquisition	$ 1,100
Goodwill recognized from acquisition	$ 800

Goodwill and Acquired Intangible Assets - Summary of Carrying Values of Intangible Assets Other than Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	$ 3,002	$ 2,208
Accumulated Amortization, Amortizable Intangible Assets	(1,867)	(1,671)
Carrying Value, Amortizable Intangible Assets	1,135	537
Gross Value	3,159	2,208
Accumulated Amortization	(1,867)	(1,671)
Carrying Value	1,292	537
In-process R&D
Finite Lived Intangible Assets [Line Items]
Carrying Value	$ 157
Developed technology
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	5 years
Gross Value, Amortizable Intangible Assets	$ 1,568	815
Accumulated Amortization, Amortizable Intangible Assets	(630)	(448)
Carrying Value, Amortizable Intangible Assets	$ 938	367
Trade name
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	5 years
Gross Value, Amortizable Intangible Assets	$ 262	103
Accumulated Amortization, Amortizable Intangible Assets	(81)	(56)
Carrying Value, Amortizable Intangible Assets	181	47
Patents and licenses
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	714	714
Accumulated Amortization, Amortizable Intangible Assets	(698)	(689)
Carrying Value, Amortizable Intangible Assets	$ 16	25
Patents and licenses \| Minimum
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	3 years 9 months 18 days
Patents and licenses \| Maximum
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	7 years
User relationships
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	3 years 6 months
Gross Value, Amortizable Intangible Assets	$ 458	458
Accumulated Amortization, Amortizable Intangible Assets	$ (458)	(360)
Carrying Value, Amortizable Intangible Assets		98
Non-compete agreement
Finite Lived Intangible Assets [Line Items]
Estimated life (in years)	2 years
Gross Value, Amortizable Intangible Assets		118
Accumulated Amortization, Amortizable Intangible Assets		$ (118)

Goodwill and Acquired Intangible Assets - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
2019	$ 372
2020	235
2021	186
2022	182
2023 and thereafter	160
Carrying Value, Amortizable Intangible Assets	$ 1,135	$ 537

Balance Sheet Components - Components of Inventories (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 5,517	$ 4,847
Raw material	562	983
Total inventory	$ 6,079	$ 5,830

Balance Sheet Components - Components of Deferred Revenue (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 15,984	$ 16,030
Less: current deferred revenue	15,556	15,521
Noncurrent deferred revenue included in other long-term liabilities	428	509
Subscription and Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	14,568	13,770
Product and Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,416	$ 2,260

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References + Details

- Definition

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References + Details

Balance Sheet Components - Components of Property And Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Property Plant And Equipment [Line Items]
Total property and equipment	$ 11,971	$ 9,462
Less: accumulated depreciation and amortization	(7,239)	(5,286)
Property and equipment, net	4,732	4,176
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment	$ 7,180	5,605
Website Development Costs
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	2 years
Total property and equipment	$ 2,579	1,973
Machinery and Equipment
Property Plant And Equipment [Line Items]
Total property and equipment	$ 1,473	1,304
Office Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	5 years
Total property and equipment	$ 88	62
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, estimated lifes	Shorter of estimated life or remaining lease term
Total property and equipment	$ 651	$ 518
Minimum
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	3 years
Minimum \| Computer Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	3 years
Minimum \| Machinery and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	3 years
Maximum
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	5 years
Maximum \| Computer Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	4 years
Maximum \| Machinery and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, estimated life	5 years

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Balance Sheet Components [Abstract]
Depreciation and amortization	$ 2.0	$ 1.6	$ 1.4

Balance Sheet Components - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Payables And Accruals [Abstract]
Accrued payroll and related expenses	$ 5,423	$ 4,546
Accrued regulatory fees and taxes	5,239	4,315
Accrued professional services	1,046	1,007
Other accrued expenses	3,069	1,711
Total accrued expenses	$ 14,777	$ 11,579

Stockholders' Equity - Additional Information (Details)		1 Months Ended			12 Months Ended
Stockholders' Equity - Additional Information (Details)	Jul. 06, 2015	Mar. 31, 2017 USD ($) $ / shares shares	Jan. 31, 2017 USD ($) $ / shares shares	Jul. 31, 2015 USD ($) $ / shares shares	Jan. 31, 2018 USD ($) Peroid $ / shares shares	Jan. 31, 2017 USD ($) $ / shares shares	Jan. 31, 2016 USD ($) $ / shares shares	Jun. 30, 2015 shares
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares issued			18,000,000		19,100,000	18,000,000
Preferred stock, shares outstanding			0		0	0
Proceeds from offering \| $					$ 1,918,000	$ 1,477,000	$ 221,000
Reverse stock split ratio	0.5
Stock option, granted					122,750
Stock Options
Stockholders Equity Note Disclosure [Line Items]
Employee stock option expiration period					10 years
Aggregate intrinsic value of vested options exercised \| $					$ 300,000	$ 1,300,000	$ 800,000
Weighted-average grant date fair value of options granted \| $ / shares					$ 4.81		$ 6.92
Stock option, granted					0
Stock Options \| Maximum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period					5 years
Restricted Stock Units (RSUs)
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period					1 year 4 months 24 days	1 year 4 months 24 days	1 year 4 months 24 days
Payment for shares of common stock withheld for tax withholdings on vesting of RSUs \| $					$ 2,443,000	$ 1,588,000	$ 0
Restricted Stock Units (RSUs) \| Maximum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period					4 years
Restricted Stock Units (RSUs) \| Minimum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period					1 year
2015 Equity Incentive Plan
Stockholders Equity Note Disclosure [Line Items]
Maximum aggregate number of shares issued under the plan								6,600,000
Initial Public Offering
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares issued				5,000,000
Public offering price \| $ / shares				$ 13.00
Net proceeds from issuance of common stock \| $				$ 56,900,000
Secondary Offering
Stockholders Equity Note Disclosure [Line Items]
Proceeds from offering \| $		$ 0	$ 0
ESPP
Stockholders Equity Note Disclosure [Line Items]
Percentage of eligible compensation subject to plan limitation					15.00%
Employee stock purchase plan offering period					24 months
Number of purchase periods \| Peroid					4
Purchase periods					6 months
Purchase price of common stock as percentage of fair market value					85.00%
Number of shares of common stock issued under ESPP					300,000	200,000
Weighted purchase price of shares of common stock under ESPP \| $ / shares			$ 5.01		$ 5.48	$ 5.01
Common Stock
Stockholders Equity Note Disclosure [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering, Shares							8,878,857
Common stock shares sold							5,000,000
Common Stock \| Secondary Offering
Stockholders Equity Note Disclosure [Line Items]
Common stock shares sold		3,300,000	3,300,000
Common stock shares sold, public offering price \| $ / shares		$ 8.85	$ 8.65			$ 8.65
Common Stock \| Overallotment Option
Stockholders Equity Note Disclosure [Line Items]
Common stock shares sold		400,000	400,000
Series Alpha Preferred Stock
Stockholders Equity Note Disclosure [Line Items]
Stock conversion ratio				100.00%
Series Alpha Preferred Stock \| Common Stock
Stockholders Equity Note Disclosure [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering, Shares				7,900,000
Series Alpha -1 Preferred Stock
Stockholders Equity Note Disclosure [Line Items]
Stock conversion ratio				100.00%
Series Alpha -1 Preferred Stock \| Common Stock
Stockholders Equity Note Disclosure [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering, Shares				500,000
Series Beta Preferred Stock
Stockholders Equity Note Disclosure [Line Items]
Preferred stock, shares outstanding				200,000
Series Beta Preferred Stock \| Common Stock
Stockholders Equity Note Disclosure [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering, Shares				500,000

Stockholders' Equity - Schedule of Common Stock Reserved for Issuance (Details) - shares	Jan. 31, 2018	Jan. 31, 2017
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	5,299,065	5,185,349
Warrants to purchase common stock
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	4,881	97,931
Options to purchase common stock
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	1,801,232	1,777,365
Shares available for future issuance under stock plans
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	928,024	918,260
Shares reserved under ESPP
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	598,033	532,597
Restricted stock units outstanding
Common Stock Reserved For Future Issuance [Line Items]
Total shares reserved for issuance	1,966,895	1,859,196

Stockholders' Equity - Summarizes of Stock Option Activities (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Number of Shares
Number of Shares, Beginning balance	1,777,365
Number of Shares, Granted	122,750
Number of Shares, Exercised	(69,352)
Number of Shares, Canceled	(29,531)
Number of Shares, Ending balance	1,801,232	1,777,365
Number of Shares, Vested and exercisable	1,533,240
Number of Shares, Vested and expected to vest	1,801,232
Weighted Average Exercise Price Per Share
Weighted Average Exercise Price Per Share, Beginning balance	$ 5.74
Weighted Average Exercise Price Per Share, Granted	10.21
Weighted Average Exercise Price Per Share, Exercised	4.32
Weighted Average Exercise Price Per Share, Canceled	6.03
Weighted Average Exercise Price Per Share, Ending balance	6.09	$ 5.74
Weighted Average Exercise Price Per Share, Vested and exercisable	5.43
Weighted Average Exercise Price Per Share, Vested and expected to vest	$ 6.09
Weighted Average Contractual Term
Weighted Average Contractual Term	6 years 2 months 12 days	7 years
Weighted Average Contractual Term, Vested and exercisable	6 years
Weighted Average Contractual Term, Vested and expected to vest	6 years 2 months 12 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 8,270	$ 7,864
Aggregate Intrinsic Value, Vested and exercisable	7,926
Aggregate Intrinsic Value, Vested and expected to vest	$ 8,270

Stockholders' Equity - Summarizes of Restricted Stock Units Activities (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Number of Shares
Number of Shares, RSUs Beginning Balance	1,859,196	1,056,905
Number of Shares, Granted	1,222,605	1,596,750
Number of Shares, Vested	(936,869)	(657,034)
Number of Shares, Canceled	(178,037)	(137,425)
Number of Shares, RSUs Ending Balance	1,966,895	1,859,196	1,056,905
Weighted Average Grant-Date Fair Value Per Share
Weighted Average Grant-Date Fair Value Per Share, Beginning Balance	$ 7.65	$ 9.60
Weighted Average Grant-Date Fair Value Per Share, Granted	10.17	7.25
Weighted Average Grant-Date Fair Value Per Share, Vested	8.54	8.76
Weighted Average Grant-Date Fair Value Per Share, Canceled	8.77	8.01
Weighted Average Grant-Date Fair Value Per Share, Ending Balance	$ 8.85	$ 7.65	$ 9.60
Weighted Average Remaining Vesting Period
Weighted Average Remaining Vesting Period	1 year 4 months 24 days	1 year 4 months 24 days	1 year 4 months 24 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 20,158	$ 17,941	$ 7,176

Stock-Based Compensation - Total Stock-Based Compensation Recognized for Stock-Based Awards in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 10,921	$ 9,772	$ 4,653
Cost of revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	1,102	1,026	437
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	1,818	1,438	611
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	3,972	3,586	1,683
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 4,029	$ 3,722	$ 1,922

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefit related to stock-based compensation expense	$ 0	$ 0	$ 0
Number of shares underlying outstanding options, options granted	122,750
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested stock option grants	$ 17,200
Stock-based compensation expenses recognized on straight line basis offering period	3 years
Number of shares underlying outstanding options, options granted	0
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested stock option grants	$ 17,200
Stock-based compensation expenses recognized on straight line basis offering period	3 years
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested stock option grants	$ 17,200
Stock-based compensation expenses recognized on straight line basis offering period	3 years

Stock-Based Compensation - Assumptions Used to Estimate Fair Value of Employee Stock Options Grants Using Black-Scholes Option Pricing Model (Details) - Stock Options	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	47.00%
Expected volatility, minimum		54.00%
Expected volatility, maximum		62.00%
Expected term (in years)	6 years 1 month 6 days
Risk-free interest rate, minimum	1.80%	1.60%
Risk-free interest rate, maximum	2.10%	1.90%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		5 years 3 months 18 days
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		6 years 1 month 6 days

Stock-Based Compensation - Assumptions Used to Estimate Fair Value of Employee Stock Purchase Plan Using Black-Scholes Option Pricing Model (Details) - ESPP	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	35.00%	37.00%	35.00%
Expected volatility, maximum	41.00%	50.00%	44.00%
Risk-free interest rate, minimum	0.90%	0.50%	0.10%
Risk-free interest rate, maximum	1.40%	1.00%	0.80%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	6 months
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	2 years	2 years	2 years 2 months 12 days

Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ (4,316)	$ (4,403)	$ (4,787)
Impact of U.S. tax law change	11,667
Change in valuation allowance	(6,786)	4,881	4,502
Research and development credit	(1,080)	(738)	(273)
State taxes	(396)	(230)	(261)
Stock-based compensation	387	387	691
Permanent tax adjustment	527	$ 103	$ 128
Total	$ 3
Federal tax at statutory rate, Rate	33.00%	34.00%	34.00%
Impact of U.S. tax law change, Rate	(89.00%)
Change in valuation allowance, Rate	52.00%	(38.00%)	(32.00%)
Research and development credit, Rate	8.00%	6.00%	2.00%
State taxes, Rate	3.00%	2.00%	2.00%
Stock-based compensation, Rate	(3.00%)	(3.00%)	(5.00%)
Permanent tax adjustment, Rate	(4.00%)	(1.00%)	(1.00%)
Total, Rate	0.00%	0.00%	0.00%

Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Deferred tax assets:
Accruals and reserves	$ 2,281	$ 2,623
Stock-based compensation	1,030	1,887
Intangible assets amortization	61	101
Deferred revenue	125	182
Net operating loss carry forwards	22,047	28,120
Tax credit carryover	3,810	2,296
Gross deferred tax assets	29,354	35,209
Valuation allowance	(28,657)	(34,900)	$ (29,900)
Net deferred tax assets	697	309
Deferred tax liabilities:
Acquired intangible assets	(313)	(183)
Fixed assets depreciation	(384)	(126)
Gross deferred tax liabilities	$ (697)	$ (309)

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Tax [Line Items]
Federal statutory income tax rate		33.00%	34.00%	34.00%
Net deferred tax assets enactment rate		21.00%
Net deferred tax asset, change in valuation allowance		$ 11,400,000
Deferred tax assets		29,354,000	$ 35,209,000
Performance based compensation and commission exceptions to tax deduction limitation		1,000,000
Valuation allowance for deferred tax assets		28,657,000	34,900,000	$ 29,900,000
Net deferred tax asset, change in valuation allowance		$ (6,200,000)	5,000,000
Net operating loss carryforwards, expired		2030
Unrecognized tax benefits		$ 2,825,000	1,815,000	1,217,000
Interest expense or penalties related to unrecognized tax benefits		$ 0	$ 0	$ 0
Research and Development
Income Tax [Line Items]
Federal tax credit, expired		2030
Federal
Income Tax [Line Items]
Net operating loss carryforwards		$ 83,000,000
Federal \| Research and Development
Income Tax [Line Items]
Tax credit carryforwards		3,700,000
State
Income Tax [Line Items]
Net operating loss carryforwards		62,000,000
State \| Research and Development
Income Tax [Line Items]
Tax credit carryforwards		3,400,000
Stock Awards Limitation
Income Tax [Line Items]
Deferred tax assets		$ 900,000
Scenario, Plan
Income Tax [Line Items]
Federal statutory income tax rate	21.00%
Maximum
Income Tax [Line Items]
Federal statutory income tax rate		35.00%

Income Taxes - Summary of Activity Related to UTBs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Balance at January 31, 2016	$ 1,815	$ 1,217
Increase related to prior year positions	139
Increase related to current year tax positions	871	598
Balance at January 31, 2017	$ 2,825	$ 1,815

Retirement Plan - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Employee contributions maximum amount	$ 18,000
Employee contributions maximum amount, over fifty years of age.	$ 24,000
Employer contribution, percent of match	50.00%
Employee maximum contribution percent of deferred salary amount	6.00%
Vesting percentage	100.00%
Compensation costs	$ 500,000	$ 400,000	$ 300,000

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Oct. 31, 2017 ft²
Commitments And Contingencies Disclosure [Abstract]
Rent expense	$ 1.9	$ 2.0	$ 1.7
Net rentable area \| ft²				33,400
Sublease agreement expiration date	2019-11
Long-term operating lease expiration date	2023-02
Lease duration period	3 years
Non-cancelable purchase commitments	$ 3.3

Commitments and Contingencies - Minimum Rental Commitments under Non-Cancelable Operating Leases (Details) $ in Thousands	Jan. 31, 2017 USD ($)
Operating Leases
2019	$ 1,937
2020	1,351
2021	570
2022	191
2023 and thereafter	212
Total	$ 4,261

Acquisitions and Divestitures - Additional Information (Details) - USD ($)			6 Months Ended
	Dec. 14, 2017	Aug. 15, 2017	Jan. 31, 2018	Jan. 31, 2017
Business Acquisition [Line Items]
Goodwill			$ 1,947,000	$ 1,117,000
Business Promoter \| Xedia Networks, Inc.
Business Acquisition [Line Items]
Proceeds from disposition of business		$ 0
Quarterly earn-out payment receivable period		5 years
Quarterly earn-out payment receivable, maximum		$ 4,500,000
Proceeds from disposition of business quarterly earn-outs			$ 200,000
Butterfleye, Inc.
Business Acquisition [Line Items]
Fair value of consideration transferred	$ 1,500,000
Earn-out payments, fair market value	300,000
Earn-out payments, gross amount	900,000
Intangible assets	1,100,000
Net liabilities assumed	100,000
Goodwill	$ 800,000

Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Numerator
Net loss	$ (13,121)	$ (12,949)	$ (14,052)
Denominator
Weighted-average common shares	18,570,128	17,490,448	10,173,095
Basic and diluted net loss per share	$ (0.71)	$ (0.74)	$ (1.38)

Net Loss Per Share - Additional Information (Details) - shares	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Earnings Per Share [Abstract]
Potentially dilutive securities excluded from the computation of diluted net loss per share	4.1	4.1	3.8

Related Party Transaction - Additional Information (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Oct. 31, 2017 ft²
Related Party Transaction [Line Items]
Rent expense	$ 1.9	$ 2.0	$ 1.7
One of Board of Director
Related Party Transaction [Line Items]
Public relations service fee	0.2	$ 0.3
Fiserv Solutions, LLC
Related Party Transaction [Line Items]
Lease rentable space of office building \| ft²				33,400
Rent expense	$ 0.2

Subsequent Events - Additional Information (Details) - Subsequent Event - Voxter Communications Inc. $ in Millions	Mar. 02, 2018 USD ($)
Subsequent Event [Line Items]
Acquisition date	Mar. 02, 2018
Fair value of consideration transferred	$ 3.6