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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Apr. 30, 2018	May 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	OOMA
Entity Registrant Name	Ooma Inc
Entity Central Index Key	0001327688
Current Fiscal Year End Date	--01-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		19,600,000

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 8,494	$ 4,483
Short-term investments	41,251	47,307
Accounts receivable, net	3,547	2,858
Inventories	6,394	6,079
Other current assets	3,429	4,397
Total current assets	63,115	65,124
Property and equipment, net	4,811	4,732
Intangible assets, net	3,231	1,292
Goodwill	3,803	1,947
Other assets	1,161	336
Total assets	76,121	73,431
Current liabilities:
Accounts payable	8,094	5,453
Accrued expenses	16,192	14,777
Deferred revenue	14,629	15,556
Total current liabilities	38,915	35,786
Other liabilities	966	577
Total liabilities	39,881	36,363
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock $0.0001 par value: 10 million shares authorized; none issued and outstanding
Common stock $0.0001 par value: 100 million shares authorized; 19.5 million and 19.1 million shares issued and outstanding, respectively	2	2
Additional paid-in capital	131,231	128,081
Accumulated other comprehensive loss	(85)	(84)
Accumulated deficit	(94,908)	(90,931)
Total stockholders’ equity	36,240	37,068
Total liabilities and stockholders’ equity	$ 76,121	$ 73,431

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Apr. 30, 2018	Jan. 31, 2018
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	19,500,000	19,100,000
Common stock, shares outstanding	19,500,000	19,100,000

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Revenue:
Subscription and services	$ 27,312,000	$ 24,100,000
Product and other	2,910,000	3,478,000
Total revenue	30,222,000	27,578,000
Cost of revenue:
Subscription and services	8,774,000	7,749,000
Product and other	3,510,000	3,796,000
Total cost of revenue	12,284,000	11,545,000
Gross profit	17,938,000	16,033,000
Operating expenses:
Sales and marketing	8,895,000	9,154,000
Research and development	8,522,000	6,621,000
General and administrative	4,452,000	3,756,000
Total operating expenses	21,869,000	19,531,000
Loss from operations	(3,931,000)	(3,498,000)
Interest and other income, net	177,000	106,000
Loss before income taxes	(3,754,000)	(3,392,000)
Income tax benefit	69,000	0
Net loss	$ (3,685,000)	$ (3,392,000)
Net loss per share of common stock:
Basic and diluted	$ (0.19)	$ (0.19)
Weighted-average number of shares used in per share amounts:
Basic and diluted	19,318,718	18,128,504

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash flows from operating activities:
Net loss	$ (3,685)	$ (3,392)
Adjustments to reconcile net loss to net cash provided by operating activities:
Stock-based compensation expense	2,314	2,971
Depreciation and amortization of property and equipment	504	468
Amortization of acquired intangible assets	145	83
Amortization and accretion of premiums from investments	(57)	75
Changes in operating assets and liabilities:
Accounts receivable, net	(874)	272
Inventories	(311)	(1,154)
Other assets	(564)	343
Accounts payable and other liabilities	2,770	569
Deferred revenue	52	(70)
Net cash provided by operating activities	294	165
Cash flows from investing activities:
Purchases of short-term investments	(5,409)	(5,441)
Proceeds from maturities of short-term investments	8,531	9,860
Proceeds from sales of short-term investments	2,995	450
Purchases of property and equipment	(405)	(579)
Business acquisition, net of cash assumed	(2,402)
Net cash provided by investing activities	3,310	4,290
Cash flows from financing activities:
Taxes paid related to net share settlement of equity awards	(759)	(300)
Proceeds from issuance of common stock	1,166	863
Net cash provided by financing activities	407	563
Net increase in cash and cash equivalents	4,011	5,018
Cash and cash equivalents at beginning of period	4,483	3,990
Cash and cash equivalents at end of period	8,494	9,008
Non-cash investing and financing activities:
Unpaid portion of property and equipment purchases	200	$ 199
Contingent consideration for business acquisition	231
Holdback payable for business acquisition	780
Shares issued for business acquisition	$ 390

Overview And Basis of Presentation	3 Months Ended
Overview And Basis of Presentation	Apr. 30, 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 communications solutions, home security and other connected services. The Company was founded in 2003 and is headquartered in Sunnyvale, California. In March 2018, the Company acquired Voxter Communications, Inc., (“Voxter”) a provider of Unified Communications-as-a-Service (“UCaaS”) for mid-market and enterprise businesses. See Note 11: Business Acquisitions below. Beginning with fiscal 2019, the Company now refers to Ooma Office and Voxter collectively as Ooma Business. Ooma Residential includes Ooma Telo basic and premier services and the Company’s home security solutions. Fiscal Year. The Company’s fiscal year ends on January 31. References to fiscal 2019 and fiscal 2018 refer to the fiscal year ending January 31, 2019 and the fiscal year ended January 31, 2018, respectively. Principles of Presentation and Consolidation These unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018 (“Annual Report”). These financial statements have been prepared on the same basis as the Company’s annual financial statements and, in the opinion of management, reflect all normal recurring adjustments necessary to present fairly the Company’s financial position, its results of operations, and cash flows for the interim periods presented, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending January 31, 2019. The condensed consolidated balance sheet as of January 31, 2018 included herein was derived from the audited financial statements as of that date. The condensed consolidated financial statements include accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated upon consolidation. Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the Company’s condensed consolidated financial statements and notes thereto. Significant estimates include, but are not limited to, those related to revenue recognition, inventory valuation, deferred commissions, valuation of goodwill and intangible assets, regulatory fees and indirect tax accruals, loss contingencies, stock-based compensation, income taxes (including valuation allowances) and fair value measurements. Estimates are based on historical experience, where applicable, and other assumptions believed to be reasonable by management. These estimates are based on information available as of the date of the condensed consolidated financial statements, and assumptions are inherently subjective in nature. Therefore, actual results could differ from management’s estimates. Comprehensive Loss. For all periods presented, comprehensive loss approximated net loss in the condensed consolidated statements of operations. Therefore, the condensed consolidated statements of comprehensive loss have been omitted. Significant Accounting Policies. Except for the accounting policies related to revenue recognition and customer acquisition costs that were updated as a result of adopting Topic 606, Revenue from Contracts with Customers, there have been no significant changes in the Company’s accounting policies from those disclosed in its Annual Report. See Note 2: Revenue, Deferred Revenue and Commissions below. Recently Adopted Accounting Standards Revenue recognition. In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606), which superseded the revenue recognition guidance in 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. The Company adopted the new standard effective February 1, 2018 under the modified retrospective method. The Company has implemented policies, processes and controls to support the standard's measurement and disclosure requirements. See Note 2: Revenue, Deferred Revenue and Commissions for disclosure on the impact of adopting this standard and updated accounting policies. Goodwill. The Company early adopted ASU 2017-04, Intangibles – Goodwill and Other (Topic 350) in the first quarter of fiscal 2019. The updated standard eliminated the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, an impairment charge will be based on the excess of a reporting unit's carrying amount over its fair value. The adoption of this standard had no impact on the Company’s condensed consolidated financial statements. Business Combinations. The Company adopted ASU 2017-01, Business Combinations (Topic 805) – Clarifying the Definition of a Business in the first quarter of fiscal 2019. The updated standard provided guidance to assist entities in evaluating when a set of transferred assets and activities constitutes a business. To be considered a business, an acquisition would have to include an input and a substantive process that together significantly contribute to the ability to create outputs. The adoption of this standard had no impact on the Company’s condensed consolidated financial statements. Accounting Standards Not Yet Adopted Leases. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) which supersedes the lease accounting requirements in Topic 840. Under Topic 842, leases would be accounted for as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee would recognize a straight-line total lease expense. The standard also requires qualitative and quantitative disclosures to elaborate and support the amounts recorded in the financial statements to aid better understanding of the adoption of the lease guidance, including the Company’s significant judgments and changes in judgments. The new standard will become effective for the Company beginning in fiscal 2020. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. 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.

Revenue, Deferred Revenue and Commissions

3 Months Ended

Apr. 30, 2018

Revenue From Contract With Customer [Abstract]

Revenue, Deferred Revenue and Commissions

Note 2: Revenue, Deferred Revenue and Commissions

On February 1, 2018, the Company adopted Topic 606, Revenue from Contracts with Customers using the modified retrospective method applied to only those contracts that were not completed as of the adoption date. The Company’s financial results for reporting periods beginning the first quarter of fiscal 2019 are presented in accordance with the provisions under Topic 606. Comparative prior period amounts have not been adjusted and continue to be reported under the historic accounting standards in effect for the periods presented.

The new standard impacted revenue recognition timing on the Company’s product sales made to certain channel partners, whereby revenue is now recognized when the Company delivers product to the channel partner (sell-in basis) rather than deferring recognition until resale by the partner to the end customer (sell-through basis). The adoption of the new standard also changed the Company’s treatment of sales commissions, whereby the Company now capitalizes its incremental costs of acquiring customer contracts and amortizes these deferred costs over the estimated customer life. Previously, all sales commissions were expensed as incurred.

See below for further discussion of the Company’s updated significant accounting policies.

As a result of adopting the standard, the February 1, 2018 beginning balance of accumulated deficit increased by $0.3 million, reflecting a net decrease to deferred revenue of approximately $1.0 million and corresponding adjustments to deferred inventory costs and other related accounts. Deferred commissions related to open contracts as of the adoption date were immaterial.

The following table summarizes the impact of adopting the new revenue standard on the Company’s condensed consolidated statement of operations and balance sheet (in thousands, except per share amounts):

Statement of Operations:	Three Months Ended April 30, 2018
	As Reported			Effect of Change			Balances without adoption of Topic 606
Total revenue	$	30,222		$	340		$	30,562
Total cost of revenue		12,284			302			12,586
Gross profit		17,938			38			17,976
Sales and marketing expense		8,895			1,062			9,957
Net loss		(3,685	)		(1,024	)		(4,709	)
Net loss per share - basic and diluted		(0.19	)		(0.05	)		(0.24	)

Balance Sheet:	As of April 30, 2018
	As Reported			Effect of Change			Balances without adoption of Topic 606
Accounts receivable, net	$	3,547		$	174		$	3,721
Other current assets ⁽¹⁾		3,429			367			3,796
Other assets ⁽²⁾		1,161			(825	)		336
Accrued expenses ⁽³⁾		16,192			(202	)		15,990
Deferred revenue		14,629			638			15,267
Accumulated deficit		(94,908	)		(720	)		(95,628	)

⁽¹⁾ Other current assets include deferred commissions and deferred inventory costs.

⁽²⁾Other assets include non-current deferred commissions.

⁽³⁾Accrued expenses include accrued customer sales incentives.

The adoption of the new standard did not have any impact on net cash provided by or used in operating, investing and financing activities in the consolidated statements of cash flows.

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 services and other connected services; and (2) product and other revenue. Subscriptions and services are sold directly to end-customers. Products are sold to end-customers through several channels, including but not limited to, distributors, retailers and resellers (collectively the “channel partners”), and the Company’s sales representatives.

Under Topic 606, the Company determines revenue recognition through the following steps:

•

identification of the contract(s) with a customer;

•

identification of the performance obligations in the contract;

•

determination of the transaction price;

•

allocation of the transaction price to the performance obligations in the contract; and

•

recognition of revenue when, or as, the Company satisfies a performance obligation

Revenue is recorded net of any sales and telecommunications taxes collected from customers to be remitted to government authorities. The Company maintained its policy to exclude these taxes from revenue under the adoption of Topic 606.

Revenue disaggregated by revenue source for the three months ended April 30, 2018 and 2017, consisted of the following (in thousands):

	Three Months Ended
	April 30, 2018		April 30, 2017
Subscription and services revenue		27,312		24,100
Product and other revenue		2,910		3,478
Total revenue	$	30,222	$	27,578

No individual country outside of the United States represented 10% or more of total revenue for the periods presented. No single customer accounted for 10% or more of total revenue for the periods presented.

Subscription and services revenue. Most of the Company’s revenue is derived from recurring subscription fees related to service plans such as Ooma Business, Ooma Residential and other communications services. All subscription revenue is recognized on a straight-line basis over the contractual service term. The Company’s service plans are generally sold as monthly subscriptions; however, certain residential plans are also offered as annual subscriptions.

In addition, the Company recognizes a small portion of its revenue on a point-in-time usage basis from services such as, prepaid international calls, directory assistance and advertisements displayed through the Company’s Talkatone mobile application.

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 for the Company’s direct customers, and to a lesser extent from porting fees that enable customers to transfer their existing phone numbers. The Company recognizes revenue from sales to direct end-customers and channel partners when the Company delivers the product or when all customer contractual provisions have been met, if any. The Company’s distribution agreements with its channel partners typically contain clauses for price protection and right of return. Therefore, the amount of product revenue recognized is adjusted for any variable consideration, such as expected returns and customer sales incentives as described in “Sales allowances” below.

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.

Multiple performance obligations. The Company’s contracts with customers typically contain multiple performance obligations that consist of product(s) and related communications services. For these contracts, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is then allocated to the separate performance obligations on a relative stand-alone selling price (“SSP”) basis. The Company determines the SSP for its communications services based on observable historical stand-alone sales to customers, for which the Company requires that a substantial majority of selling prices fall within a reasonably narrow pricing range. The Company does not have a directly observable SSP for its on-premise appliance and end-point devices, and therefore establishes SSP based on its best estimates and judgments, considering company-specific factors such as pricing strategies, estimated product and other costs, and bundling and discounting practices.

Sales allowances. Credits and/or rebates issued to customers for product returns and sales incentives are deemed to be variable consideration under Topic 606, which the Company estimates and records as a reduction to revenue at the point of sale. Product returns and customer sales incentives are estimated based on the Company’s historical experience, current trends and expectations regarding future experience. Trends are influenced by product life cycles, new product introductions, market acceptance of products, the type of customer, seasonality and other factors. Product return and sales incentive rates may fluctuate over time, but are sufficiently predictable to allow the Company to estimate expected future amounts. The Company monitors the accuracy of its reserve estimates by reviewing actual returns and sales incentives and adjusts them for future expectations to determine the adequacy of current reserve needs. If actual future returns and sales incentives differ from past experience, additional reserves may be required. The Company recorded total allowances for product returns and customer sales incentives of $0.6 million and $0.6 million as of April 30, 2018 and January 31, 2018.

Accounts Receivable

Accounts receivable are stated at invoice value less estimated allowances for doubtful accounts and product returns (whereas customer sales incentives are recorded as a component of accrued expenses). The Company records its allowances based upon its assessment of several factors, including historical experience, aging of receivable balances and economic conditions. As of April 30, 2018 and January 31, 2018, the Company recorded allowances for doubtful accounts of $0.1 million.

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

	As of
	April 30, 2018			January 31, 2018
Customer A		19	%	*
Customer B	*				10	%

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

Customer Acquisition Costs

The Company recognizes an asset related to the costs incurred to obtain a contract if management expects to recover those costs and the Company would not have incurred those costs if the contract had not been obtained.

Based on this policy, the Company capitalizes its sales commissions and other costs paid to internal sales personnel, third-party sales entities and value-added resellers that are incremental to obtaining customer contracts. These deferred costs are then amortized on a systematic basis over the estimated customer life of five years, calculated based on both qualitative and quantitative factors, such as product life cycles and customer attrition. Amortization expense is included in sales and marketing expenses in the accompanying condensed consolidated statement of operations. The Company periodically evaluates whether there have been any changes in its business, the market conditions in which it operates or other events which would indicate that its amortization period should be changed or if there are there are potential indicators of impairment.

The Company’s deferred commission costs were approximately $1.0 million as of April 30, 2018. The $0.2 million current portion and $0.8 million non-current portion of deferred commission costs were included in other current assets and other assets, respectively, within the condensed consolidated balance sheet. During the three months ended April 30, 2018, amortization expense was less than $0.1 million and there was no impairment loss in relation to the costs capitalized.

Deferred Revenue

Deferred revenue primarily consists of billings or payments received in advance of meeting revenue recognition criteria. The Company’s communications services are sold as monthly or annual subscriptions, payable in advance. The Company recognizes deferred 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 classified in long term liabilities on the consolidated balance sheets.

	As of
	April 30, 2018		January 31, 2018
Deferred revenue:
Subscription and services	$	14,899	$	14,568
Product and other		132		1,416
Total deferred revenue		15,031		15,984
Less: current deferred revenue		14,629		15,556
Noncurrent deferred revenue included in other long-term liabilities	$	402	$	428

During the three months ended April 30, 2018, the Company recognized revenue of approximately $9.5 million pertaining to amounts deferred as of January 31, 2018. As of April 30, 2018, the Company’s deferred revenue balance was primarily composed of subscription contracts that were invoiced during the first quarter of fiscal 2019, as well as amounts recorded during fiscal 2018 for annual contracts.

Remaining Performance Obligations

As of April 30, 2018, revenue of approximately $0.8 million is expected to be recognized from remaining performance obligations for open contracts with an original expected length of more than one year. This amount includes both long-term deferred revenue and non-cancelable contract amounts that will be invoiced and recognized as revenue in future periods. The Company expects to recognize revenue of approximately $0.4 million over the next 12 months and the remainder thereafter.

Fair Value Measurements

3 Months Ended

Apr. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note 3: Fair Value Measurements

The Company records its financial assets and liabilities at fair value. The Company estimates and categorizes fair value 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.

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 April 30, 2018								Balance as of January 31, 2018
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	4,641	$	—	$	—	$	4,641	$	554	$	—	$	—	$	554
Commercial paper		—		—		—		—		—		2,844		—		2,844
Total cash equivalents	$	4,641	$	—	$	—	$	4,641	$	554	$	2,844	$	—	$	3,398
Cash								3,853								1,085
Total cash and cash equivalents							$	8,494							$	4,483

Short-term investments:
U.S. government securities	$	17,391	$	—	$	—	$	17,391	$	20,867	$	—	$	—	$	20,867
Corporate debt securities		—		11,952		—		11,952		—		13,895		—		13,895
Commercial paper		—		9,184		—		9,184		—		9,272		—		9,272
U.S. agency securities		—		999		—		999		—		1,996		—		1,996
Asset-backed securities		—		1,725		—		1,725		—		1,277		—		1,277
Total short-term investments	$	17,391	$	23,860	$	—	$	41,251	$	20,867	$	26,440	$	—	$	47,307

Liabilities:
Contingent consideration	$	—	$	—	$	542	$	542	$	—	$	—	$	311	$	311
Total liabilities	$	—	$	—	$	542	$	542	$	—	$	—	$	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. There were no transfers of financial assets or liabilities between levels during the periods presented.

As of April 30, 2018 and January 31, 2018, the amortized cost of the Company’s cash equivalents and marketable securities approximated their fair value and there were no material realized or unrealized gains or losses, either individually or in the aggregate. There were no investments in the Company’s portfolio that were other-than-temporarily impaired.

Level 3 liabilities consisted of contingent consideration related to the Company’s acquisitions of Butterfleye, Inc. in December 2017 and Voxter Communications in March 2018 that were estimated using income-based approaches. Key inputs 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. There have been no settlements or changes in the fair value of contingent consideration.

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

	As of April 30, 2018				As of January 31, 2018
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	40,342	$	40,268	$	43,227	$	43,172
Over one year and less than two years		995		983		4,164		4,135
Total	$	41,337	$	41,251	$	47,391	$	47,307

- 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

Balance Sheet Components

3 Months Ended

Apr. 30, 2018

Balance Sheet Components [Abstract]

Balance Sheet Components

Note 4: Balance Sheet Components

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

Inventories

	As of
	April 30, 2018		January 31, 2018
Finished goods	$	5,048	$	5,517
Raw material		1,346		562
Total inventory	$	6,394	$	6,079

Other Current Assets

	As of
	April 30, 2018		January 31, 2018
Prepaid expenses	$	1,188	$	1,921
Deferred sales commissions		237		—
Deferred inventory costs		116		1,061
Other current assets		1,888		1,415
Total other current assets	$	3,429	$	4,397

Intangible Assets and Goodwill

The carrying amount of goodwill was $3.8 million and $1.9 million as of April 30, 2018 and January 31, 2018, respectively. The Company recognized $2.1 million in intangibles and $1.9 million in goodwill following the acquisition of Voxter in March 2018. See Note 11: Business Acquisitions below. There was no change to goodwill subsequent to this acquisition.

	As of April 30, 2018							As of January 31, 2018
	Gross Value		Accumulated Amortization			Carrying Value		Gross Value		Accumulated Amortization			Carrying Value
Developed technology		2,560		(732	)	$	1,828	$	1,568	$	(630	)	$	938
Customer relationships		902		(23	)		879		—		—			—
Trade name		451		(98	)		353		262		(81	)		181
Patents and licenses		714		(700	)		14		714		(698	)		16
User relationships		458		(458	)		—		458		(458	)		—
Total amortizable assets		5,085		(2,011	)		3,074		3,002		(1,867	)		1,135
In-process R&D		157		—			157		157		—			157
Total intangible assets	$	5,242	$	(2,011	)	$	3,231	$	3,159	$	(1,867	)	$	1,292

At April 30, 2018, the estimated future amortization expense for intangible assets was as follows (in thousands):

Fiscal Years Ending January 31,	Total
2019 remainder	$	591
2020		652
2021		603
2022		599
2023 and thereafter		629
Total	$	3,074

Accrued Expenses

	As of
	April 30, 2018		January 31, 2018
Regulatory fees and taxes	$	6,146	$	5,239
Payroll and related expenses		3,522		5,423
Professional services		1,398		1,046
Acquisition-related consideration		1,353		353
Other		3,773		2,716
Total accrued expenses	$	16,192	$	14,777

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Apr. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 5: 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 $0.7 million and $0.4 million for the three months ended April 30, 2018 and 2017, respectively. As of April 30, 2018 and January 31, 2018, future minimum rental commitments under non-cancelable operating leases were $4.3 million. As of April 30, 2018 and January 31, 2018, non-cancelable purchase commitments with the Company’s contract manufacturers were $4.2 million and $3.3 million, respectively. 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. As of April 30, 2018, other than amounts accrued for the Oregon Tax litigation as described below, the Company did not have any material accrued liabilities recorded for loss contingencies in its consolidated financial statements. 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 (“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 and such other relief as the court may deem proper. The Company believes that the plaintiff’s claims are without merit since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Pennsylvania. The Company intends to continue vigorously defending against 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. 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. In February 2017, the Court granted the Company’s motion to transfer the case to the Northern District of California, which proceeding has been stayed pending the outcome of an inter partes review of the Deep Green Wireless Patent by the United States Patent Trial and Appeal Board. 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. 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. On March 27, 2018, the Magistrate Division of the Oregon Tax Court issued its decision denying the Company’s motion, and granting the DOR’s motion for summary judgment. Notwithstanding such decision, the Company believes that the Commerce Clause of the United States Constitution bars the application of the Tax and the Assessments to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Oregon. The Company intends to file an appeal of the Magistrate Divisions decision with the Regular Division of the Oregon Tax Court, and 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 further unfavorable 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. As of April 30, 2018, the condensed consolidated balance sheet included an accrual of approximately $0.3 million in other current liabilities as the amount of loss deemed probable and reasonably estimable to result from the Oregon Tax Litigation. Secure Cam Litigation On May 2, 2018, plaintiff Secure Cam, LLC filed a complaint in the U.S. District Court for the Northern District of California against the Company’s wholly-owned subsidiary, Butterfleye, Inc., alleging infringement of four United States patents (No. 8,531,555, No. 8,350,928, No. 8,836,819 and No. 9,363,408) (the “Secure Cam Litigation”). The complaint seeks unspecified monetary damages, costs, attorneys’ fees and other appropriate relief. The Company plans to contest the complaint vigorously. Based upon the Company’s preliminary investigation, the Company does not believe that its products infringe any valid or enforceable claim of the aforementioned patents, although the outcome of any litigation can never be certain. 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 Secure Cam 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 November 29, 2017, the Superior Court dismissed the claims that were based on Sections 12(a)(2) and 15 of the Securities Act with prejudice, but denied the Company’s motion to stay the case pending the United States Supreme Court’s decision in Cyan v. Beaver Cnty. Emp. Ret.‘ Fund. 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’ claim 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. 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.

Stockholders' Equity

3 Months Ended

Apr. 30, 2018

Equity [Abstract]

Stockholders' Equity

Note 6: Stockholders’ Equity

Equity Incentive Plan. The 2015 Equity Incentive Plan provides for the grant of incentive stock options to its employees and any of its subsidiary corporations’ employees, and for the grant of restricted stock units (“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.

Stock option activity for the three months ended April 30, 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, 2018		1,801,232		$	6.09		6.2	$	8,270
Granted		100,000		$	11.75
Exercised		(60,718	)	$	4.87
Canceled		(11,652	)	$	7.67
Balance as of April 30, 2018		1,828,862		$	6.43
Vested and exercisable as of April 30, 2018		1,518,013		$	5.56		5.7	$	8,249

The aggregate intrinsic value of vested options exercised during the three months ended April 30, 2018 and 2017 was $0.2 million and $0.1 million, respectively. The weighted average grant date fair value of options granted during the three months ended April 30, 2018 and 2017 was $5.28 and $4.81, respectively.

RSU activity for the three months ended April 30, 2018 was as follows:

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share
Balance as of January 31, 2018		1,966,895		$	8.85
Granted		966,675		$	11.71
Vested		(204,728	)	$	8.33
Canceled		(129,251	)	$	8.33
Balance as of April 30, 2018		2,599,591		$	9.99

Employee Stock Purchase Plan. The 2015 Employee Stock Purchase Plan (“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 are able to 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.

During the three months ended April 30, 2018 and 2017, employees purchased approximately 0.2 million and 0.2 million shares, respectively, at a weighted purchase price of $5.65 and $5.34 per share, respectively.

Stock-Based Compensation

3 Months Ended

Apr. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

Note 7. Stock-Based Compensation

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

	Three Months Ended
	April 30, 2018		April 30, 2017
Cost of revenue	$	192	$	315
Sales and marketing		326		520
Research and development		863		1,068
General and administrative		933		1,068
Total stock-based compensation expense	$	2,314	$	2,971

As of April 30, 2018, there was $26.9 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.

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

	Three Months Ended
	April 30, 2018	April 30, 2017
Stock Options:
Expected volatility	43%	47%
Expected term (in years)	6.1	6.1
Risk-free interest rate	2.7%	2.1%
Dividend yield	—%	—%
ESPP:
Expected volatility	47%-56%	35%-41%
Expected term (in years)	0.5-2.0	0.5-2.0
Risk-free interest rate	2.0%-2.3%	0.9%-1.3%
Dividend yield	—%	—%

Income Taxes	3 Months Ended
Income Taxes	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 8: Income Taxes The Company recorded an income tax benefit of $0.1 million during the three months ended April 30, 2018, primarily related to the Company’s acquisition of Voxter, a corporation incorporated in the province of British Columbia, Canada. See Note 11: Business Acquisitions. The Company did not record a provision or benefit for income taxes during the three months ended April 30, 2017. The Company continues to maintain a full valuation allowance against its deferred tax assets. Uncertain Tax Positions As of April 30, 2018, the Company had unrecognized tax benefits of $3.0 million, none of which would currently affect the Company's effective tax rate if recognized due to the Company's deferred tax assets being fully offset by a valuation allowance. The Company does not anticipate that the amount of unrecognized tax benefits relating to tax positions existing at April 30, 2018 will significantly increase or decrease within the next twelve months. There was no interest expense or penalties related to unrecognized tax benefits recorded through April 30, 2018. A number of years may elapse before an uncertain tax position is audited and finally resolved. While it is often difficult to predict the final outcome or the timing of resolution of any particular uncertain tax position, the Company believes that its reserves for income taxes reflect the most likely outcome. The Company adjusts these reserves, as well as the related interest, in light of changing facts and circumstances. Settlement of any particular position could require the use of cash. U.S. Tax Reform On December 22, 2017, the Tax Cuts and Jobs Act (the “Tax Act”) was enacted, containing significant changes to U.S. tax law, including: a permanent reduction in the U.S. corporate tax rate from 35% to 21%, effective January 1, 2018; implementing a territorial tax system; and imposing a one-time tax on deemed repatriated earnings of foreign subsidiaries. As a result of the reduction in the corporate income tax rate, the Company revalued its net deferred tax assets at December 22, 2017. Effective for tax years beginning on January 1, 2018 or later, which is considered fiscal 2019 for the Company, tax reform legislation modified 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 officer, 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. While the Tax Act provides a territorial tax system, beginning in calendar year 2018, it also included two new U.S. tax base erosion provisions, the global intangible low-taxed income (GILTI) provision and the base-erosion and anti-abuse tax (BEAT) provision. The GILTI provision requires the Company to include in its U.S. income tax return foreign subsidiary earnings in excess of an allowable return on the foreign subsidiary’s tangible assets. The BEAT provision in the Tax Act eliminates the deduction of certain base-erosion payments made to related foreign corporations and imposes a minimum tax if greater than regular tax. The BEAT provision may not apply to the Company in the near future. However, the Company intends to account for the GILTI tax in the period in which it is incurred. The Company does not expect GILTI provisions to result in significant additional U.S. taxes in fiscal 2019. 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.

Basic and Diluted Net Loss Per Share

3 Months Ended

Apr. 30, 2018

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

Note 9: Basic and Diluted Net Loss Per Share

Basic and diluted net loss per share is calculated by dividing the net loss 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 of common stock because the effects of potentially dilutive securities are antidilutive as the Company reported net losses for all periods presented.

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

	Three Months Ended
	April 30, 2018			April 30, 2017
Numerator
Net loss	$	(3,685	)	$	(3,392	)
Denominator
Weighted-average common shares		19,318,718			18,128,504
Basic and diluted net loss per share	$	(0.19	)	$	(0.19	)

Potentially dilutive securities of approximately 4.6 million and 5.1 million were excluded from the computation of diluted net loss per share for the three months ended April 30, 2018 and 2017, respectively, and included the Company’s RSUs, stock options and shares to be purchased under the ESPP.

Related Party Transaction	3 Months Ended
Related Party Transaction	Apr. 30, 2018
Related Party Transactions [Abstract]
Related Party Transaction	Note 10: Related Party Transactions Through February 2018, one of the members of the Company’s board of directors was affiliated with a professional firm that provided public relations services to the Company. The Company incurred expenses of less than $0.1 million for the three months ended April 30, 2018 and 2017 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 for the three months ended April 30, 2018 under this sublease agreement.

Business Acquisition

3 Months Ended

Apr. 30, 2018

Business Combinations [Abstract]

Business Acquisition

Note 11: Business Acquisition

On March 12, 2018, the Company completed its acquisition of Voxter Communications Inc., a privately-held provider of UCaaS solutions for mid-market and enterprise businesses.

The acquisition date fair value consideration transferred for Voxter was approximately $3.9 million, which consisted of the following (in thousands, except for share data):

	Fair Value
Cash paid at closing	$	2,510
Common stock issued at closing (35,513 shares)		390
Holdback payable⁽¹⁾		780
Contingent consideration⁽²⁾		231
Total	$	3,911

⁽¹⁾ Amounts to be paid in cash after a one-year holdback period.

⁽²⁾ Fair value of deferred earn-out payments ($0.8 million gross) contingent upon the achievement of certain performance targets.

The final purchase price allocation included identifiable intangible assets of approximately $2.1 million, net assets acquired of approximately $0.4 million, deferred tax liabilities of approximately $0.4 million and residual goodwill of approximately $1.9 million, based on the best estimates of management. See Note 4: Balance Sheet Components above. Acquisition-related transaction costs charged to expense were approximately $0.3 million. The goodwill recognized was attributable primarily to expected synergies in the acquired technologies that may be leveraged by the Company in future Ooma business offerings. Goodwill is not expected to be deductible for U.S. or Canadian 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 Voxter acquisition have not been presented because it does not have a material impact on the Company's consolidated results of operations.

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Apr. 30, 2018
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year. The Company’s fiscal year ends on January 31. References to fiscal 2019 and fiscal 2018 refer to the fiscal year ending January 31, 2019 and the fiscal year ended January 31, 2018, respectively.
Principles of Presentation and Consolidation	Principles of Presentation and Consolidation These unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018 (“Annual Report”). These financial statements have been prepared on the same basis as the Company’s annual financial statements and, in the opinion of management, reflect all normal recurring adjustments necessary to present fairly the Company’s financial position, its results of operations, and cash flows for the interim periods presented, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending January 31, 2019. The condensed consolidated balance sheet as of January 31, 2018 included herein was derived from the audited financial statements as of that date. The condensed consolidated financial statements include accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated upon consolidation.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the Company’s condensed consolidated financial statements and notes thereto. Significant estimates include, but are not limited to, those related to revenue recognition, inventory valuation, deferred commissions, valuation of goodwill and intangible assets, regulatory fees and indirect tax accruals, loss contingencies, stock-based compensation, income taxes (including valuation allowances) and fair value measurements. Estimates are based on historical experience, where applicable, and other assumptions believed to be reasonable by management. These estimates are based on information available as of the date of the condensed consolidated financial statements, and assumptions are inherently subjective in nature. Therefore, actual results could differ from management’s estimates.
Comprehensive Loss	Comprehensive Loss. For all periods presented, comprehensive loss approximated net loss in the condensed consolidated statements of operations. Therefore, the condensed consolidated statements of comprehensive loss have been omitted.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards Revenue recognition. In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606), which superseded the revenue recognition guidance in 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. The Company adopted the new standard effective February 1, 2018 under the modified retrospective method. The Company has implemented policies, processes and controls to support the standard's measurement and disclosure requirements. See Note 2: Revenue, Deferred Revenue and Commissions for disclosure on the impact of adopting this standard and updated accounting policies. Goodwill. The Company early adopted ASU 2017-04, Intangibles – Goodwill and Other (Topic 350) in the first quarter of fiscal 2019. The updated standard eliminated the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, an impairment charge will be based on the excess of a reporting unit's carrying amount over its fair value. The adoption of this standard had no impact on the Company’s condensed consolidated financial statements. Business Combinations. The Company adopted ASU 2017-01, Business Combinations (Topic 805) – Clarifying the Definition of a Business in the first quarter of fiscal 2019. The updated standard provided guidance to assist entities in evaluating when a set of transferred assets and activities constitutes a business. To be considered a business, an acquisition would have to include an input and a substantive process that together significantly contribute to the ability to create outputs. The adoption of this standard had no impact on the Company’s condensed consolidated financial statements.
Accounting Standards Not Yet Adopted	Accounting Standards Not Yet Adopted Leases. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) which supersedes the lease accounting requirements in Topic 840. Under Topic 842, leases would be accounted for as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee would recognize a straight-line total lease expense. The standard also requires qualitative and quantitative disclosures to elaborate and support the amounts recorded in the financial statements to aid better understanding of the adoption of the lease guidance, including the Company’s significant judgments and changes in judgments. The new standard will become effective for the Company beginning in fiscal 2020. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. 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.

Revenue, Deferred Revenue and Commissions (Tables)

3 Months Ended

Apr. 30, 2018

Summary of Revenue Disaggregated by Revenue Source

Revenue disaggregated by revenue source for the three months ended April 30, 2018 and 2017, consisted of the following (in thousands):

	Three Months Ended
	April 30, 2018		April 30, 2017
Subscription and services revenue		27,312		24,100
Product and other revenue		2,910		3,478
Total revenue	$	30,222	$	27,578

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
	April 30, 2018			January 31, 2018
Customer A		19	%	*
Customer B	*				10	%

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

Components of Deferred Revenue

	As of
	April 30, 2018		January 31, 2018
Deferred revenue:
Subscription and services	$	14,899	$	14,568
Product and other		132		1,416
Total deferred revenue		15,031		15,984
Less: current deferred revenue		14,629		15,556
Noncurrent deferred revenue included in other long-term liabilities	$	402	$	428

Topic 606

Summary of Impact of Adopting New Revenue Standard on Condensed Consolidated Statement of Operations and Balance Sheet

Statement of Operations:	Three Months Ended April 30, 2018
	As Reported			Effect of Change			Balances without adoption of Topic 606
Total revenue	$	30,222		$	340		$	30,562
Total cost of revenue		12,284			302			12,586
Gross profit		17,938			38			17,976
Sales and marketing expense		8,895			1,062			9,957
Net loss		(3,685	)		(1,024	)		(4,709	)
Net loss per share - basic and diluted		(0.19	)		(0.05	)		(0.24	)

Balance Sheet:	As of April 30, 2018
	As Reported			Effect of Change			Balances without adoption of Topic 606
Accounts receivable, net	$	3,547		$	174		$	3,721
Other current assets ⁽¹⁾		3,429			367			3,796
Other assets ⁽²⁾		1,161			(825	)		336
Accrued expenses ⁽³⁾		16,192			(202	)		15,990
Deferred revenue		14,629			638			15,267
Accumulated deficit		(94,908	)		(720	)		(95,628	)

⁽¹⁾ Other current assets include deferred commissions and deferred inventory costs.

⁽²⁾Other assets include non-current deferred commissions.

⁽³⁾Accrued expenses include accrued customer sales incentives.

Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 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 April 30, 2018								Balance as of January 31, 2018
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	4,641	$	—	$	—	$	4,641	$	554	$	—	$	—	$	554
Commercial paper		—		—		—		—		—		2,844		—		2,844
Total cash equivalents	$	4,641	$	—	$	—	$	4,641	$	554	$	2,844	$	—	$	3,398
Cash								3,853								1,085
Total cash and cash equivalents							$	8,494							$	4,483

Short-term investments:
U.S. government securities	$	17,391	$	—	$	—	$	17,391	$	20,867	$	—	$	—	$	20,867
Corporate debt securities		—		11,952		—		11,952		—		13,895		—		13,895
Commercial paper		—		9,184		—		9,184		—		9,272		—		9,272
U.S. agency securities		—		999		—		999		—		1,996		—		1,996
Asset-backed securities		—		1,725		—		1,725		—		1,277		—		1,277
Total short-term investments	$	17,391	$	23,860	$	—	$	41,251	$	20,867	$	26,440	$	—	$	47,307

Liabilities:
Contingent consideration	$	—	$	—	$	542	$	542	$	—	$	—	$	311	$	311
Total liabilities	$	—	$	—	$	542	$	542	$	—	$	—	$	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 April 30, 2018				As of January 31, 2018
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	40,342	$	40,268	$	43,227	$	43,172
Over one year and less than two years		995		983		4,164		4,135
Total	$	41,337	$	41,251	$	47,391	$	47,307

- 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

Balance Sheet Components (Tables)

3 Months Ended

Apr. 30, 2018

Balance Sheet Components [Abstract]

Components of Inventories

Inventories

	As of
	April 30, 2018		January 31, 2018
Finished goods	$	5,048	$	5,517
Raw material		1,346		562
Total inventory	$	6,394	$	6,079

Components of Other Current Assets

Other Current Assets

	As of
	April 30, 2018		January 31, 2018
Prepaid expenses	$	1,188	$	1,921
Deferred sales commissions		237		—
Deferred inventory costs		116		1,061
Other current assets		1,888		1,415
Total other current assets	$	3,429	$	4,397

Schedule of Carrying Value of Intangible Assets Other than Goodwill

	As of April 30, 2018							As of January 31, 2018
	Gross Value		Accumulated Amortization			Carrying Value		Gross Value		Accumulated Amortization			Carrying Value
Developed technology		2,560		(732	)	$	1,828	$	1,568	$	(630	)	$	938
Customer relationships		902		(23	)		879		—		—			—
Trade name		451		(98	)		353		262		(81	)		181
Patents and licenses		714		(700	)		14		714		(698	)		16
User relationships		458		(458	)		—		458		(458	)		—
Total amortizable assets		5,085		(2,011	)		3,074		3,002		(1,867	)		1,135
In-process R&D		157		—			157		157		—			157
Total intangible assets	$	5,242	$	(2,011	)	$	3,231	$	3,159	$	(1,867	)	$	1,292

Schedule of Estimated Future Amortization Expense

At April 30, 2018, the estimated future amortization expense for intangible assets was as follows (in thousands):

Fiscal Years Ending January 31,	Total
2019 remainder	$	591
2020		652
2021		603
2022		599
2023 and thereafter		629
Total	$	3,074

Components of Accrued Expenses

Accrued Expenses

	As of
	April 30, 2018		January 31, 2018
Regulatory fees and taxes	$	6,146	$	5,239
Payroll and related expenses		3,522		5,423
Professional services		1,398		1,046
Acquisition-related consideration		1,353		353
Other		3,773		2,716
Total accrued expenses	$	16,192	$	14,777

Stockholders' Equity (Tables)

3 Months Ended

Apr. 30, 2018

Equity [Abstract]

Summarizes of Stock Option Activities

Stock option activity for the three months ended April 30, 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, 2018		1,801,232		$	6.09		6.2	$	8,270
Granted		100,000		$	11.75
Exercised		(60,718	)	$	4.87
Canceled		(11,652	)	$	7.67
Balance as of April 30, 2018		1,828,862		$	6.43
Vested and exercisable as of April 30, 2018		1,518,013		$	5.56		5.7	$	8,249

Summarizes of Restricted Stock Units Activities

RSU activity for the three months ended April 30, 2018 was as follows:

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share
Balance as of January 31, 2018		1,966,895		$	8.85
Granted		966,675		$	11.71
Vested		(204,728	)	$	8.33
Canceled		(129,251	)	$	8.33
Balance as of April 30, 2018		2,599,591		$	9.99

Stock-Based Compensation (Tables)

3 Months Ended

Apr. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

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 condensed consolidated statements of operations was as follows (in thousands):

	Three Months Ended
	April 30, 2018		April 30, 2017
Cost of revenue	$	192	$	315
Sales and marketing		326		520
Research and development		863		1,068
General and administrative		933		1,068
Total stock-based compensation expense	$	2,314	$	2,971

Summary of Assumptions Used to Estimate Fair Value of Employee Stock Options Grants and Employee Stock Purchase Plan Using Black-Scholes Option Pricing Model

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

	Three Months Ended
	April 30, 2018	April 30, 2017
Stock Options:
Expected volatility	43%	47%
Expected term (in years)	6.1	6.1
Risk-free interest rate	2.7%	2.1%
Dividend yield	—%	—%
ESPP:
Expected volatility	47%-56%	35%-41%
Expected term (in years)	0.5-2.0	0.5-2.0
Risk-free interest rate	2.0%-2.3%	0.9%-1.3%
Dividend yield	—%	—%

Basic and Diluted Net Loss Per Share (Tables)

3 Months Ended

Apr. 30, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss Per Share of Common Stock

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

	Three Months Ended
	April 30, 2018			April 30, 2017
Numerator
Net loss	$	(3,685	)	$	(3,392	)
Denominator
Weighted-average common shares		19,318,718			18,128,504
Basic and diluted net loss per share	$	(0.19	)	$	(0.19	)

Business Acquisition (Tables)

3 Months Ended

Apr. 30, 2018

Business Combinations [Abstract]

Schedule of Fair Value of Consideration Transferred

The acquisition date fair value consideration transferred for Voxter was approximately $3.9 million, which consisted of the following (in thousands, except for share data):

	Fair Value
Cash paid at closing	$	2,510
Common stock issued at closing (35,513 shares)		390
Holdback payable⁽¹⁾		780
Contingent consideration⁽²⁾		231
Total	$	3,911

⁽¹⁾ Amounts to be paid in cash after a one-year holdback period.

⁽²⁾ Fair value of deferred earn-out payments ($0.8 million gross) contingent upon the achievement of certain performance targets.

Revenue, Deferred Revenue and Commissions - Additional Information (Details)		3 Months Ended		12 Months Ended
	Feb. 01, 2018 USD ($)	Apr. 30, 2018 USD ($) Source Country Customer	Apr. 30, 2017 USD ($) Country Customer	Jan. 31, 2018 USD ($)	Apr. 30, 2019 USD ($)
Disaggregation Of Revenue [Line Items]
Net decrease in deferred revenue	$ 1,000,000
Net increase to accumulated deficit due to adoption of new standard	$ 300,000
Net cash provided by or used in operating activities		$ 294,000	$ 165,000
Net cash provided by or used in investing activities		$ 3,310,000	$ 4,290,000
Number of sources of revenue \| Source		2
Number of countries outside United States represented 10% or more of total revenue \| Country		0	0
Number of customers that individually exceeded 10% of revenue \| Customer		0	0
Allowances for product returns and customer sales incentives		$ 600,000		$ 600,000
Allowances for doubtful accounts		$ 100,000		$ 100,000
Estimated customer life		5 years
Deferred commission costs		$ 1,000,000
Deferred commission costs current		200,000
Deferred commission costs non current		800,000
Amortization expense		100,000
Impairment loss in relation to deferred commission costs capitalized		0
Deferred revenue recognized		9,500,000
Revenue expected to be recognized from remaining performance obligations		800,000
Scenario, Forecast
Disaggregation Of Revenue [Line Items]
Revenue expected to be recognized from remaining performance obligations					$ 400,000
Adjustment \| Topic 606
Disaggregation Of Revenue [Line Items]
Net cash provided by or used in operating activities		0
Net cash provided by or used in investing activities		$ 0

Revenue, Deferred Revenue and Commissions - Summary of Impact of Adopting New Revenue Standard on Condensed Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenue	$ 30,222	$ 27,578
Total cost of revenue	12,284	11,545
Gross profit	17,938	16,033
Sales and marketing	8,895	9,154
Net loss	$ (3,685)	$ (3,392)
Basic and diluted	$ (0.19)	$ (0.19)
Effect of Change \| Topic 606
Disaggregation Of Revenue [Line Items]
Total revenue	$ 340
Total cost of revenue	302
Gross profit	38
Sales and marketing	1,062
Net loss	$ (1,024)
Basic and diluted	$ (0.05)
Balances Without Adoption of Topic 606 \| Topic 606
Disaggregation Of Revenue [Line Items]
Total revenue	$ 30,562
Total cost of revenue	12,586
Gross profit	17,976
Sales and marketing	9,957
Net loss	$ (4,709)
Basic and diluted	$ (0.24)

Revenue, Deferred Revenue and Commissions - Summary of Impact of Adopting New Revenue Standard on Condensed Consolidated Statement of Balance Sheet (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	$ 3,547	$ 2,858
Other current assets	3,429	4,397
Other assets	1,161	336
Accrued expenses	16,192	14,777
Deferred revenue	14,629	15,556
Accumulated deficit	(94,908)	$ (90,931)
Effect of Change \| Topic 606
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	174
Other current assets	367
Other assets	(825)
Accrued expenses	(202)
Deferred revenue	638
Accumulated deficit	(720)
Balances Without Adoption of Topic 606 \| Topic 606
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	3,721
Other current assets	3,796
Other assets	336
Accrued expenses	15,990
Deferred revenue	15,267
Accumulated deficit	$ (95,628)

Revenue, Deferred Revenue and Commissions - Summary of Revenue Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenue	$ 30,222	$ 27,578
Subscription and services revenue
Disaggregation Of Revenue [Line Items]
Total revenue	27,312	24,100
Product and other revenue
Disaggregation Of Revenue [Line Items]
Total revenue	$ 2,910	$ 3,478

Revenue, Deferred Revenue and Commissions - Concentration of Net Accounts Receivable Balance (Details) - Accounts Receivable - Customer Concentration Risk	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Jan. 31, 2018
Customer A
Concentration Risk [Line Items]
Concentration risk percentage	19.00%
Customer B
Concentration Risk [Line Items]
Concentration risk percentage		10.00%

Revenue, Deferred Revenue and Commissions - Components of Deferred Revenue (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 15,031	$ 15,984
Less: current deferred revenue	14,629	15,556
Noncurrent deferred revenue included in other long-term liabilities	402	428
Subscription and Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	14,899	14,568
Product and Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 132	$ 1,416

- 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

Fair Value Measurements - Schedule of Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Assets:
Total cash and cash equivalents	$ 8,494	$ 4,483
Total short-term investments	41,251	47,307
Liabilities:
Total liabilities	542	311
Commercial Paper
Assets:
Total short-term investments	9,184	9,272
Corporate Debt Securities
Assets:
Total short-term investments	11,952	13,895
U.S. Agency Securities
Assets:
Total short-term investments	999	1,996
U.S. Government Securities
Assets:
Total short-term investments	17,391	20,867
Asset-backed Securities
Assets:
Total short-term investments	1,725	1,277
Cash Equivalents
Assets:
Total cash and cash equivalents	4,641	3,398
Cash Equivalents \| Commercial Paper
Assets:
Total cash and cash equivalents		2,844
Cash Equivalents \| Money Market Funds
Assets:
Total cash and cash equivalents	4,641	554
Cash
Assets:
Total cash and cash equivalents	3,853	1,085
Level 1
Assets:
Total short-term investments	17,391	20,867
Level 1 \| U.S. Government Securities
Assets:
Total short-term investments	17,391	20,867
Level 1 \| Cash Equivalents
Assets:
Total cash and cash equivalents	4,641	554
Level 1 \| Cash Equivalents \| Money Market Funds
Assets:
Total cash and cash equivalents	4,641	554
Level 2
Assets:
Total short-term investments	23,860	26,440
Level 2 \| Commercial Paper
Assets:
Total short-term investments	9,184	9,272
Level 2 \| Corporate Debt Securities
Assets:
Total short-term investments	11,952	13,895
Level 2 \| U.S. Agency Securities
Assets:
Total short-term investments	999	1,996
Level 2 \| Asset-backed Securities
Assets:
Total short-term investments	1,725	1,277
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	542	311
Contingent Consideration
Liabilities:
Total liabilities	542	311
Contingent Consideration \| Level 3
Liabilities:
Total liabilities	$ 542	$ 311

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Jan. 31, 2018
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	Apr. 30, 2018	Jan. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
One year or less, amortized cost	$ 40,342	$ 43,227
Over one year and less than two years, amortized cost	995	4,164
Short-term Investments, Amortized Cost	41,337	47,391
One year or less, fair value	40,268	43,172
Over one year and less than two years, fair value	983	4,135
Short-term Investments, Fair Value	$ 41,251	$ 47,307

Balance Sheet Components - Components of Inventories (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 5,048	$ 5,517
Raw material	1,346	562
Total inventory	$ 6,394	$ 6,079

Balance Sheet Components - Components of Other Current Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]
Prepaid expenses	$ 1,188	$ 1,921
Deferred sales commissions	237
Deferred inventory costs	116	1,061
Other current assets	1,888	1,415
Total other current assets	$ 3,429	$ 4,397

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Thousands	Mar. 12, 2018	Apr. 30, 2018	Jan. 31, 2018
Finite Lived Intangible Assets [Line Items]
Goodwill		$ 3,803	$ 1,947
Voxter Communications Inc.
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 1,900
Intangible assets recognized from acquisition	2,100
Goodwill recognized from acquisition	$ 1,900

Balance Sheet Components - Summary of Carrying Values of Intangible Assets Other than Goodwill (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	$ 5,085	$ 3,002
Accumulated Amortization, Amortizable Intangible Assets	(2,011)	(1,867)
Carrying Value, Amortizable Intangible Assets	3,074	1,135
Gross Value	5,242	3,159
Accumulated Amortization	(2,011)	(1,867)
Carrying Value	3,231	1,292
In-process R&D
Finite Lived Intangible Assets [Line Items]
Carrying Value	157	157
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	2,560	1,568
Accumulated Amortization, Amortizable Intangible Assets	(732)	(630)
Carrying Value, Amortizable Intangible Assets	1,828	938
Customer relationships
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	902
Accumulated Amortization, Amortizable Intangible Assets	(23)
Carrying Value, Amortizable Intangible Assets	879
Trade name
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	451	262
Accumulated Amortization, Amortizable Intangible Assets	(98)	(81)
Carrying Value, Amortizable Intangible Assets	353	181
Patents and licenses
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	714	714
Accumulated Amortization, Amortizable Intangible Assets	(700)	(698)
Carrying Value, Amortizable Intangible Assets	14	16
User relationships
Finite Lived Intangible Assets [Line Items]
Gross Value, Amortizable Intangible Assets	458	458
Accumulated Amortization, Amortizable Intangible Assets	$ (458)	$ (458)

Balance Sheet Components - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
2019 remainder	$ 591
2020	652
2021	603
2022	599
2023 and thereafter	629
Carrying Value, Amortizable Intangible Assets	$ 3,074	$ 1,135

Balance Sheet Components - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Payables And Accruals [Abstract]
Regulatory fees and taxes	$ 6,146	$ 5,239
Payroll and related expenses	3,522	5,423
Professional services	1,398	1,046
Acquisition-related consideration	1,353	353
Other	3,773	2,716
Total accrued expenses	$ 16,192	$ 14,777

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Rent expense	$ 0.7	$ 0.4
Future minimum rental commitments under noncancelable operating leases	4.3		$ 4.3
Non-cancelable purchase commitments	4.2		$ 3.3
Accrual included in other current liabilities	$ 0.3

Stockholders' Equity - Summarizes of Stock Option Activities (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Jan. 31, 2018
Number of Shares
Number of Shares, Beginning balance	1,801,232
Number of Shares, Granted	100,000
Number of Shares, Exercised	(60,718)
Number of Shares, Canceled	(11,652)
Number of Shares, Ending balance	1,828,862	1,801,232
Number of Shares, Vested and exercisable	1,518,013
Weighted Average Exercise Price Per Share
Weighted Average Exercise Price Per Share, Beginning balance	$ 6.09
Weighted Average Exercise Price Per Share, Granted	11.75
Weighted Average Exercise Price Per Share, Exercised	4.87
Weighted Average Exercise Price Per Share, Canceled	7.67
Weighted Average Exercise Price Per Share, Ending balance	6.43	$ 6.09
Weighted Average Exercise Price Per Share, Vested and exercisable	$ 5.56
Weighted Average Contractual Term
Weighted Average Contractual Term		6 years 2 months 12 days
Weighted Average Contractual Term, Vested and exercisable	5 years 8 months 12 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value		$ 8,270
Aggregate Intrinsic Value, Vested and exercisable	$ 8,249

Stockholders' Equity - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2018 USD ($) Peroid $ / shares shares	Apr. 30, 2017 USD ($) $ / shares shares
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 \| shares	0.2	0.2
Weighted purchase price of shares of common stock under ESPP	$ 5.65	$ 5.34
Stock Options
Stockholders Equity Note Disclosure [Line Items]
Aggregate intrinsic value of vested options exercised \| $	$ 0.2	$ 0.1
Weighted-average grant date fair value of options granted	$ 5.28	$ 4.81

Stockholders' Equity - Summarizes of Restricted Stock Units Activities (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Apr. 30, 2018 $ / shares shares
Number of Shares
Number of Shares, RSUs Beginning Balance \| shares	1,966,895
Number of Shares, Granted \| shares	966,675
Number of Shares, Vested \| shares	(204,728)
Number of Shares, Canceled \| shares	(129,251)
Number of Shares, RSUs Ending Balance \| shares	2,599,591
Weighted Average Grant-Date Fair Value Per Share
Weighted Average Grant-Date Fair Value Per Share, Beginning Balance \| $ / shares	$ 8.85
Weighted Average Grant-Date Fair Value Per Share, Granted \| $ / shares	11.71
Weighted Average Grant-Date Fair Value Per Share, Vested \| $ / shares	8.33
Weighted Average Grant-Date Fair Value Per Share, Canceled \| $ / shares	8.33
Weighted Average Grant-Date Fair Value Per Share, Ending Balance \| $ / shares	$ 9.99

Stock-Based Compensation - Total Stock-Based Compensation Recognized for Stock-Based Awards in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 2,314	$ 2,971
Cost of revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	192	315
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	326	520
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	863	1,068
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 933	$ 1,068

Stock-Based Compensation - Additional Information (Details)	3 Months Ended
	Apr. 30, 2018 USD ($)
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested stock option grants	$ 26,900
Stock-based compensation expenses recognized on straight line basis offering period	3 years
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	$ 26,900
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	$ 26,900
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 and Employee Stock Purchase Plan Using Black-Scholes Option Pricing Model (Details)	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	47.00%	35.00%
Expected volatility, maximum	56.00%	41.00%
Risk-free interest rate, minimum	2.00%	0.90%
Risk-free interest rate, maximum	2.30%	1.30%
ESPP \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months	6 months
ESPP \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	2 years	2 years
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	43.00%	47.00%
Expected term (in years)	6 years 1 month 6 days	6 years 1 month 6 days
Risk-free interest rate	2.70%	2.10%

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Income Tax [Line Items]
Provision or benefit for income taxes	$ 69,000	$ 0
Unrecognized tax benefits	3,000,000
Interest expense or penalties related to unrecognized tax benefits	$ 0
U.S. corporate tax rate	21.00%
Performance based compensation and commission exceptions to tax deduction limitation	$ 1,000,000
Maximum
Income Tax [Line Items]
U.S. corporate tax rate			35.00%
Voxter Communications Inc.
Income Tax [Line Items]
Provision or benefit for income taxes	$ 100,000

Basic and Diluted Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Numerator
Net loss	$ (3,685)	$ (3,392)
Denominator
Weighted-average common shares	19,318,718	18,128,504
Basic and diluted net loss per share	$ (0.19)	$ (0.19)

Basic and Diluted Net Loss Per Share - Additional Information (Details) - shares shares in Millions	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Earnings Per Share [Abstract]
Potentially dilutive securities excluded from the computation of diluted net loss per share	4.6	5.1

Related Party Transaction - Additional Information (Details)	3 Months Ended
	Apr. 30, 2018 USD ($)	Apr. 30, 2017 USD ($)	Oct. 31, 2017 ft²
Related Party Transaction [Line Items]
Rent expense	$ 700,000	$ 400,000
One of Board Members \| Maximum
Related Party Transaction [Line Items]
Public relations services fee	100,000	$ 100,000
Fiserv Solutions, LLC
Related Party Transaction [Line Items]
Lease rentable space of office building \| ft²			33,400
Rent expense	$ 200,000

Business Acquisition - Additional Information (Details) - USD ($) $ in Thousands	Mar. 12, 2018	Apr. 30, 2018	Jan. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 3,803	$ 1,947
Voxter Communications Inc.
Business Acquisition [Line Items]
Acquisition completion date	Mar. 12, 2018
Fair value of consideration transferred	$ 3,911
Intangible assets	2,100
Net assets acquired	400
Deferred tax liabilities	400
Goodwill	1,900
Acquisition-related transaction costs	$ 300

Business Acquisition - Schedule of Fair Value of Consideration Transferred (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 12, 2018	Apr. 30, 2018
Business Acquisition [Line Items]
Shares issued for business acquisition		$ 390
Contingent consideration for business acquisition		$ 231
Voxter Communications Inc.
Business Acquisition [Line Items]
Cash paid at closing	$ 2,510
Shares issued for business acquisition	390
Contingent consideration for business acquisition	780
Contingent consideration	231
Total	$ 3,911

Business Acquisition - Schedule of Fair Value of Consideration Transferred (Parenthetical) (Details) - Voxter Communications Inc. $ in Millions	Mar. 12, 2018 USD ($) shares
Business Acquisition [Line Items]
Business acquisition, number of common stock issued \| shares	35,513
Earn-out payments, gross amount \| $	$ 0.8