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Document and Entity Information - shares	9 Months Ended
Oct. 31, 2016	Nov. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2016
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	OOMA
Entity Registrant Name	Ooma Inc
Entity Central Index Key	0001327688
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		17,896,570

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 6,308	$ 27,413
Short-term investments	47,054	27,991
Accounts receivable, net	4,866	5,609
Inventories	4,592	5,011
Deferred inventory costs	1,443	2,013
Prepaid expenses and other current assets	2,033	1,318
Total current assets	66,296	69,355
Property and equipment, net	4,212	4,291
Intangible assets, net	620	885
Goodwill	1,117	1,117
Other assets	303	888
Total assets	72,548	76,536
Current liabilities:
Accounts payable	4,778	4,786
Accrued expenses	11,972	13,010
Short-term capital lease		632
Deferred revenue	14,899	15,036
Total current liabilities	31,649	33,464
Other liabilities	543	182
Total liabilities	32,192	33,646
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock $0.0001 par value: 100,000,000 shares authorized; no shares issued and outstanding on October 31, 2016 and January 31, 2016, respectively.
Common stock $0.0001 par value: 100,000,000 shares authorized; 17,892,367 and 16,916,250 shares issued and outstanding on October 31, 2016 and January 31, 2016, respectively.	2	2
Additional paid-in capital	115,314	107,679
Accumulated other comprehensive income	18	17
Accumulated deficit	(74,978)	(64,808)
Total stockholders’ equity	40,356	42,890
Total liabilities and stockholders’ equity	$ 72,548	$ 76,536

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Revenue:
Subscription and services	$ 23,179	$ 19,470	$ 67,086	$ 52,495
Product and other	3,828	4,006	9,874	11,969
Total revenue	27,007	23,476	76,960	64,464
Cost of revenue:
Subscription and services	7,388	6,715	22,103	18,649
Product and other	4,276	4,277	11,316	12,067
Total cost of revenue	11,664	10,992	33,419	30,716
Gross profit	15,343	12,484	43,541	33,748
Operating expenses:
Sales and marketing	8,302	7,539	24,975	20,247
Research and development	6,244	4,948	17,824	13,329
General and administrative	3,705	3,499	11,105	9,666
Total operating expenses	18,251	15,986	53,904	43,242
Loss from operations	(2,908)	(3,502)	(10,363)	(9,494)
Other income (expense):
Interest income (expense), net	95	(10)	259	(902)
Change in fair value of warrants				(442)
Other expense, net	(8)	(19)	(13)	(31)
Net loss	$ (2,821)	$ (3,531)	$ (10,117)	$ (10,869)
Net loss per share of common stock:
Basic and diluted	$ (0.16)	$ (0.21)	$ (0.58)	$ (1.38)
Weighted-average number of shares used in per share amounts:
Basic and diluted	17,648,251	16,703,852	17,337,682	7,875,761

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Cash flows from operating activities:
Net loss	$ (10,117,000)	$ (10,869,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	7,243,000	2,725,000
Depreciation and amortization	1,320,000	1,046,000
Amortization of intangible assets	265,000	295,000
Write-off of non-cash deferred debt issuance costs		332,000
Other non-cash (income) expense, net	(3,000)	64,000
Change in fair value of acquisition-related contingent consideration		167,000
Change in fair value of warrant liability		442,000
Changes in operating assets and liabilities:
Accounts receivable, net	743,000	(1,853,000)
Inventories	419,000	2,292,000
Deferred inventory costs	570,000	(426,000)
Prepaid expenses and other assets	(99,000)	(531,000)
Accounts payable and accrued expenses	(766,000)	4,509,000
Other liabilities	(47,000)	(88,000)
Deferred revenue	296,000	1,199,000
Net cash used in operating activities	(176,000)	(696,000)
Cash flows from investing activities:
Purchases of short-term investments	(44,178,000)
Proceeds from maturity of short-term investments	20,650,000
Proceeds from sale of short-term investments	4,366,000
Purchases of property and equipment	(1,146,000)	(1,117,000)
Net cash used in investing activities	(20,308,000)	(1,117,000)
Cash flows from financing activities:
Proceeds from initial public offering, net		57,303,000
Repayment of debt and capital leases	(628,000)	(11,457,000)
Payment of acquisition related earn-out	(100,000)	(475,000)
Payment of preferred warrant liability		(584,000)
Proceeds from issuance of common stock related to warrants and employee stock benefit plans	1,447,000	178,000
Net cash (used in) provided by financing activities	(621,000)	49,965,000
Net (decrease) increase in cash and cash equivalents	(21,105,000)	48,152,000
Cash and cash equivalents at beginning of period	27,413,000	9,133,000
Cash and cash equivalents at end of period	6,308,000	57,285,000
Restricted stock units
Cash flows from financing activities:
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (1,340,000)	0
Series Beta Preferred Stock
Cash flows from financing activities:
Proceeds from Series Beta preferred stock, net		$ 5,000,000

Description of Business and Summary of Significant Accounting Policies

9 Months Ended

Oct. 31, 2016

Accounting Policies [Abstract]

Description of Business and Summary of Significant Accounting Policies

1. Description of Business and Summary of Significant Accounting Policies

Description of Business

Ooma, Inc. (the “Company”) is a leading provider of innovative communications solutions and other connected services to small business, home, and mobile users. The Company’s unique hybrid Software-as-a-Service (“SaaS”) platform, consisting of its proprietary cloud, on-premises appliances, mobile applications, and end-point devices, provides the connectivity and functionality that enables solutions. The Company was incorporated in Delaware on November 19, 2003 and is headquartered in Palo Alto, California

Basis of Presentation

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 consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2016.

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, 2017. The condensed consolidated balance sheet as of January 31, 2016 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 subsidiary. All significant intercompany transactions and balances have been eliminated upon consolidation.

Reverse Stock Split

Effective July 6, 2015, the Company completed a one-for-two reverse stock split, as approved by its Board of Directors (the “Board”). All shares and warrants and per share and warrant amounts set forth herein give effect to this reverse stock split.

Initial Public Offering and Conversion of Preferred Stock

In July 2015, the Company completed its initial public offering (the “IPO”), in which 5,000,000 shares of common stock were sold to the public at an IPO price of $13.00 per share. The net proceeds from the offering were $56.9 million after deducting the underwriters’ discounts and commissions of $4.5 million and $3.6 million of offering expenses.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates include, but are not limited to, those related to revenue recognition, the allowance for returns, stock-based compensation and warrants, valuation of goodwill and intangible assets, inventory valuation, regulatory fees and indirect tax accruals, accounting for 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. Actual results could differ from those estimates. 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.

Concentration of Risk

The concentration of accounts receivable as of October 31, 2016 and January 31, 2016, respectively are as follows:

	As of
	October 31, 2016		January 31, 2016
Customer A		16%		13%
Customer B		10%	*

*	Represented less than 10% of accounts receivable, net as of January 31, 2016

There were no customers that individually exceeded 10% of revenue during the three and nine months ended October 31, 2016 and 2015.

Summary of Significant Accounting Policies

There have been no material changes to the Company's significant accounting policies as described in its Annual Report on Form 10-K for the year ended January 31, 2016 except for changes due to the recently adopted accounting standards.

Recently Adopted Accounting Standard

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. This ASU affects entities that issue share-based payment awards to their employees. The ASU is designed to simplify several aspects of accounting for share-based payment award transactions which include – the income tax consequences, classification of awards as either equity or liabilities, classification on the statement of cash flows and forfeiture rate calculations. The Company early adopted ASU 2016-09 during the three months ended October 31, 2016. The Company has elected to account for forfeitures as they occur rather than estimate expected forfeiture using a modified retrospective transition method. As a result of this the Company recorded a cumulative-effect adjustment of $0.1 million to accumulated deficit and additional paid-in capital. Additionally, under ASU 2016-09, excess tax benefits and deficiencies are required to be recognized prospectively as part of provision for income taxes rather than additional paid-in capital. The adoption did not have any material impact on our accounting of provision for income taxes. Finally, ASU 2016-09 requires excess tax benefits to be presented as a component of operating cash flows rather than financing cash flows. The Company has adopted this requirement prospectively and accordingly, prior periods have not been adjusted. Excess tax benefits were not material for all periods presented.

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, which simplifies the presentation of deferred income taxes. The ASU requires that deferred tax assets and liabilities be classified as non-current in a statement of financial position, thereby simplifying the current guidance that requires an entity to separate deferred assets and liabilities into current and noncurrent amounts. The Company early adopted ASU 2015-17 as of January 31, 2016 on a prospective basis. The statement of financial position as of January 31, 2016 reflects the classification of deferred tax assets and liabilities as noncurrent. No prior periods were retrospectively adjusted because such an adjustment was not material and does not affect comparability.

Recent Accounting Pronouncements Not Yet Adopted

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments, which provides guidance to reduce diversity in practice for eight cash flow classification issues, such as debt prepayment or debt extinguishment cost, contingent consideration payment made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies and distributions received from equity method investees. ASU 2016-15 will become effective for the Company in the first quarter of fiscal 2019. Early adoption is permitted. The Company is currently evaluating the impact of this guidance on its condensed consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, which improves financial reporting by providing timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. This ASU requires an organization to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Additionally, the new standard amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will become effective for the Company in the first quarter of fiscal 2021. Early adoption is permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. This ASU requires assets and liabilities arising from leases, including operating leases, to be recognized on the balance sheet. ASU 2016-02 will become effective for the Company in the first quarter of fiscal 2020, and requires adoption using a modified retrospective approach. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

In July 2015, the FASB issued ASU No. 2015-11 (ASC 330), Simplifying the Measurement of Inventory. Update No. 2015-11 requires companies to measure inventory using the lower of cost and net realizable value. It is effective for annual reporting periods beginning after December 15, 2016 and interim periods within those fiscal years. The Company is currently evaluating the impact, if any, of this guidance on its consolidated financial statements.

In August 2014, the FASB issued ASU No. 2014-15 (ASC 205), Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern. The new standard provides guidance around management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on its consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which affects any entity that either enters into contracts with customers to transfer goods and services or enters into contracts for the transfer of nonfinancial assets. ASU 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the currently effective guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. In July 2015, the FASB approved a one-year deferral of the effective date of the standard with the issuance of by ASU 2015-14, Revenue from Contracts with Customers (ASC 606) Deferral of Effective Date. As a result, ASU 2014-09 will become effective for the Company in the first quarter of fiscal 2019 and can be adopted either retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. Early adoption is permitted but not before the original effective date of annual periods beginning after December 15, 2016. In April 2016 and May 2016, the FASB issued ASU 2016-10 and ASU 2016-12, respectively, which clarifies guidance on identifying performance obligations, collectability criterion and noncash consideration. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Fair Value Measurement

9 Months Ended

Oct. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurement

2. Fair Value Measurement

The Company records its financial assets and liabilities at fair value. The inputs used in the valuation methodologies in measuring fair value are defined in the fair value hierarchy as follows:

Level 1:

Quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical assets or liabilities.

Level 2:

Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.

Level 3:

Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities and which reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.

The Company’s financial instruments consist of Level 1, Level 2 assets and Level 3 liabilities.

As of January 31, 2016, the Level 3 liabilities consisted of acquisition-related contingent consideration. During the first quarter of fiscal 2017, this liability was settled in cash and issuance of shares of common stock.

There were no transfers into or out of the Level 3 category during the nine months ended October 31, 2016.

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):

	As of October 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	3,078	$	—	$	—	$	3,078
Total cash equivalents	$	3,078	$	—	$	—	$	3,078
Cash								3,230
Total Cash and cash equivalents							$	6,308

Short-term investments:
Corporate debt securities	$	—	$	11,693	$	—	$	11,693
Commercial paper		—		9,376		—		9,376
U.S. agency securities		—		6,574		—		6,574
U.S. government securities		18,059		—		—		18,059
Asset-backed securities		—		1,352		—		1,352
Total short-term investments	$	18,059	$	28,995	$	—	$	47,054

	As of January 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	3,462	$	—	$	—	$	3,462
Commercial paper		—		3,499		—		3,499
Total cash equivalents	$	3,462	$	3,499	$	—	$	6,961
Cash								20,452
Total Cash and cash equivalents							$	27,413

Short-term investments:
Corporate debt securities	$	—	$	7,845	$	—	$	7,845
Commercial paper		—		4,986		—		4,986
U.S. agency securities		—		7,666		—		7,666
U.S. government securities		7,494		—		—		7,494
Total short-term investments	$	7,494	$	20,497	$	—	$	27,991

Liabilities:
Acquisition-related contingent consideration	$	—	$	—	$	288	$	288
Total liabilities	$	—	$	—	$	288	$	288

Changes in the Level 3 fair value category for the periods presented were as follows (in thousands):

	Acquisition-Related Contingent Consideration
Balance at January 31, 2016	$	288
Payout of consideration		(123	)
Issuance of shares		(165	)
Balance at October 31, 2016	$	—

The carrying value of the Company’s accounts receivable, inventory, accounts payable and other current assets and current liabilities approximates fair value due to short maturities.

- 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

Short-term Investments

9 Months Ended

Oct. 31, 2016

Investments Debt And Equity Securities [Abstract]

Short-term Investments

3. Short-term Investments

Short-term investments consisted of the following (in thousands):

	As of October 31, 2016
	Amortized Cost		Unrealized Losses			Unrealized Gains		Fair Value
Corporate debt securities	$	11,697	$	(5	)	$	1	$	11,693
Commercial paper		9,376		—			—		9,376
U.S. agency securities		6,567		—			7		6,574
U.S. government securities		18,044		—			15		18,059
Asset-backed securities		1,352		—			—		1,352
Total short-term investments	$	47,036	$	(5	)	$	23	$	47,054

	As of January 31, 2016
	Amortized Cost		Unrealized Losses			Unrealized Gains		Fair Value
Corporate debt securities	$	7,851	$	(6	)	$	—	$	7,845
Commercial paper		4,985		—			1		4,986
U.S. agency securities		7,661		—			5		7,666
U.S. government securities		7,477		—			17		7,494
Total short-term investments	$	27,974	$	(6	)	$	23	$	27,991

The gross realized gains and losses related to the Company’s short-term investments were not material for the three and nine months ended October 31, 2016. The Company did not have any gross realized gains or gross realized losses for the three and nine months ended October 31, 2015.

The cost basis and fair value of the short-term investments by contractual maturity were as follows (in thousands):

	As of October 31, 2016				As of January 31, 2016
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	41,485	$	41,495	$	19,143	$	19,145
Over one year and less than two years		5,551		5,559		8,831		8,846
Total	$	47,036	$	47,054	$	27,974	$	27,991

Investments in an unrealized loss position consisted of the following (in thousands):

	As of October 31, 2016					As of January 31, 2016
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate debt securities	$	11,693	$	(5	)	$	7,845	$	(6	)

The Company reviews the individual securities in its portfolio to determine whether a decline in a security’s fair value below the amortized cost basis is other-than-temporary. The Company determined that as of October 31, 2016 and January 31, 2016, there were no investments in its portfolio that were other-than-temporarily impaired. The Company does not intend to sell any of these investments, and it is not more likely than not that the Company would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity.

Balance Sheet Components

9 Months Ended

Oct. 31, 2016

Balance Sheet Components [Abstract]

Balance Sheet Components

4. Balance Sheet Components

Inventories

The components of inventories were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Finished goods	$	3,792	$	4,633
Raw material		800		378
Total inventory	$	4,592	$	5,011

Deferred Revenue

The components of deferred revenue were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Deferred revenue:
Subscription and services	$	13,453	$	11,954
Product and other		1,915		3,118
Total deferred revenue		15,368		15,072
Less: current portion of deferred revenue		14,899		15,036
Deferred revenue, noncurrent portion included in other liabilities	$	469	$	36

Accrued Expenses

The components of accrued expenses were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Accrued regulatory fees and taxes	$	4,186	$	5,216
Accrued payroll and related expenses		3,842		3,559
Acquisition-related contingent consideration-current portion		—		288
Other accrued expenses		3,944		3,947
Total accrued expenses	$	11,972	$	13,010

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Oct. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies Leases and Purchase Commitments The Company leases office space in Palo Alto and Newark, California under operating leases. As of October 31, 2016, the Company had $1.8 million outstanding under operating leases with lease periods expiring through November 2020. In January 2015, the Company entered into a capital lease for computer equipment that was scheduled to mature in December 2016 with the right to purchase the equipment at maturity for one dollar. The Company repaid the outstanding balance of $0.6 million in April 2016. Rent expense was $0.5 million and $0.4 million for the three months ended October 31, 2016 and 2015, respectively, and $1.6 million and $1.2 million for the nine months ended October 31, 2016 and 2015, respectively. As of October 31, 2016, non-cancelable purchase commitments were $4.0 million. Legal Proceedings Oregon 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 Ooma are 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”). The Company believes that the Commerce Clause of the United States Constitution bars the application of the Tax to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Oregon, and therefore the application of the Tax against Ooma and the Assessments are barred by the United States Constitution. The Company will continue vigorously litigating the Complaint in pursuit of the full abatement of the Assessments. 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 Litigation”). The complaint seeks unspecified monetary damages, costs, attorneys’ fees and other appropriate relief. On July 29, 2016 the Company filed its answer, affirmative defenses and counterclaims, and on August 2, 2016 the Company filed a motion to transfer the case to the Northern District of California. Deep Green Wireless has filed an answer to the Company’s counterclaims and a response to the Company’s motion to transfer the case. Based upon its investigation, the Company does not believe that its products infringe any valid or enforceable claim of the aforementioned patent, and plans to continue vigorously defending against the plaintiff’s claim. 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 Ooma, certain of its officers and directors, and certain of the underwriters of our Initial Public Offering on July 17, 2015 (the “IPO”). 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 Securities and Exchange Commission (the “SEC”). The consolidated complaint alleges that Ooma and the other defendants violated the Securities Act of 1933, as amended (the “Securities Act”) by issuing the Registration Statement and Prospectus, which the plaintiffs allege contained material misstatements and omissions in violation of Sections 11, 12(a)(2) and 15 of the Securities Act. The plaintiffs seek class certification, compensatory damages, attorneys’ fees and costs, rescission or a rescissory measure of damages, equitable and/or injunctive relief, and such other relief as the court may deem proper. On July 1, 2016 Ooma filed its answer to the complaint, and on August 26, 2016 Ooma filed a motion for judgment on the pleadings. Ooma believes that the plaintiffs’ claims are without merit and is vigorously defending against the Securities Litigation. Berks County Litigation On January 21, 2016 the County of Berks, Pennsylvania filed a lawsuit in the Berks County Court of Common Please naming the Company and 113 other telephone service providers as defendants (the “Berks County Litigation”), alleging breach of fiduciary duty, fraud, and negligent misrepresentation in connection with alleged violations of the Pennsylvania 911 Emergency Communication Services Act, 35 Pa.C.S.A. §5301 et seq. (“PA 911 Act”) for failure to collect from subscribers and remit certain fees pursuant to the PA 911 Act. The plaintiff seeks a declaratory judgment that we must comply with the PA 911 Act, compensatory and punitive damages, attorneys’ fees and costs, equitable and/or injunctive relief and such other relief as the court may deem proper. On May 17, 2016 the court issued an order overruling the defendants’ joint preliminary objections, which are, in essence, the Pennsylvania equivalent of a motion to dismiss. Notwithstanding such adverse order, the Company believes that the Commerce Clause of the United States Constitution bars the application of the PA 911 Act to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Pennsylvania, and therefore the plaintiff’s claims are without merit. The Company intends to continue vigorously defending this lawsuit. Alabama Litigation On November 12, 2015 the Alabama Statewide 9-1-1 Board filed a lawsuit in the Circuit Court of Montgomery, Alabama against the Company (the “Alabama Litigation”). The lawsuit alleges that the Company has failed to collect from its subscribers and remit certain fees pursuant to the Alabama Emergency Telephone Services Act (the “AETS Act”). The plaintiff seeks a declaratory judgment that we must comply with the AETS Act, compensatory and punitive damages, attorneys’ fees and costs, equitable and/or injunctive relief and such other relief as the court may deem proper. The Company believes that the Commerce Clause of the United States Constitution bars the application of the AETS Act to the Company, since the Company has no employees, property or other indicia of a “substantial nexus” with the State of Alabama, and therefore the plaintiff’s claims are without merit. The Company filed an answer to the Alabama complaint on April 15, 2016 and will continue vigorously defending this lawsuit. The Company is party to actions and proceedings incident to the Company’s business in the ordinary course of business, including litigation regarding its intellectual property, challenges to the enforceability or validity of its intellectual property, and claims that the Company’s products or services infringe on the intellectual property rights of others. The Company accrues a liability for such matters when it is probable that future expenditures will be made and such expenditures can be reasonably estimated. In connection with the Oregon Litigation, Deep Green Wireless Litigation, Securities Litigation, Berks County Litigation and the Alabama Litigation proceedings, the Company has determined that the amount of any material loss or range of any material losses that is reasonably possible to result from each such proceeding is not reasonably estimable. Accordingly, no material reserves have been recorded in the Company’s condensed consolidated financial statements with respect to any of such litigations. 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

9 Months Ended

Oct. 31, 2016

Equity [Abstract]

Stockholders' Equity

8. Stockholders’ Equity

Common Stock and Preferred Stock

On July 6, 2015, the Company filed an amended and restated certificate of incorporation to increase the amount of common stock authorized for issuance to 100,000,000 shares with a par value of $0.0001 per share and 10,000,000 shares with a $0.0001 par value per share of preferred stock.

As of October 31, 2016, the Company had 17,892,367 shares of common stock outstanding which included the 5,000,000 shares issued in the IPO. The Company did not have any shares of preferred stock issued and outstanding.

Equity Award Plans

2005 Stock Plan

The Board of Directors adopted, and the stockholders approved, the Company’s 2005 Stock Plan (the “2005 Plan”), in April 2005. The 2005 Plan provides for the grant of incentive stock options to its employees (and employees of its subsidiaries), and for the grant of non-statutory stock options and stock purchase rights to its employees, directors and consultants (and employees and consultants of its subsidiaries). In June 2015, the 2005 Plan was amended and restated in the form of the 2015 Equity Incentive Plan described below. The terms of the 2005 Plan will continue to govern the terms and conditions of the outstanding awards previously granted thereunder.

2015 Equity Incentive Plan

In June 2015, the Company amended and restated its 2005 Plan in the form of 2015 Equity Incentive Plan (the “2015 Plan”) which became effective immediately upon the effectiveness of the Company’s IPO. The 2015 Plan provides for the grant of incentive stock options to its employees and any of its subsidiary corporations’ employees, and for the grant of non-statutory stock options, stock appreciation rights, restricted stock, restricted stock units, performance units and performance shares to its employees, directors and consultants and its subsidiary corporations’ employees and consultants. The Company initially reserved 4,433,102 shares under the 2015 Plan (which is the number of shares previously reserved for issuance under the 2005 Plan) plus 2,205,828 shares which is the number of shares equal to 10% of its outstanding shares of common stock measured at the time of completion of its IPO (as determined on a fully diluted basis, including the shares reserved under its equity plans). In addition, the number of shares available for issuance under the 2015 Plan will be annually increased on the first day of each of its fiscal years beginning with fiscal 2017, by an amount equal to the lessor of (i) 5% of the outstanding shares of its common stock as of the last day of its immediately preceding fiscal year; and (ii) such other amount as the Company’s board of directors may determine. In April 2016, an additional 854,483 shares were authorized for future issuance under the 2015 Plan.

As of October 31, 2016, the Company had 984,031 shares available for future issuance.

Employee Stock Purchase Plan

In conjunction with the completion of its IPO, the Company adopted the 2015 Employee Stock Purchase Plan (“ESPP”). A maximum of 441,165 shares were initially authorized for future issuance. The number of authorized shares under the ESPP is subject to increase on an annual basis. In April 2016, an additional 341,793 shares were authorized for future issuance. The 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 (i) at the date of commencement of the offering period or (ii) at the last day of the purchase 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 nine months ended October 31, 2016, there were two purchases that resulted in the issuance of 234,792 shares of common stock at a weighted average purchase price of $5.01 per share.

On March 15, 2016 the Company started a new offering period at a new offering price based on the closing price of the Company’s common stock on the same date. The Company concluded that starting a new offering period prior to the completion of the existing offering period resulted in an accounting modification and accordingly, recorded $0.3 million of incremental compensation charge to be recognized over the remaining life of the ESPP offering period. The Company recorded stock-based compensation related to the ESPP of $0.2 million and $0.2 million, respectively, for the three months ended October 31, 2016 and 2015, and $0.7 million and $0.2 million, respectively, for the nine months ended October 31, 2016 and 2015.

Stock Options

Options to purchase shares of common stock may be granted to employees, directors, and consultants. These options vest from date of grant to up to five years and expire 10 years from the date of grant. Options may be exercised anytime during their term in accordance with the vesting/exercise schedule specified in the recipient’s stock option agreement and in accordance with the plan provisions. Shares issued upon exercise prior to vesting, are subject to a right of repurchase, which lapses according to the original option vesting schedule.

Summary of option activity under the Company’s 2005 Plan and 2015 Plan for the nine months ended October 31, 2016 is set forth below:

	Options Outstanding
	Number of					Weighted
	Shares			Weighted		Average		Aggregate
	Underlying			Average		Remaining		Intrinsic
	Outstanding			Exercise		Contractual Term		Value
	Options			Price		(Years)		(in thousands)
Balance, January 31, 2016		2,087,584		$	5.59		7.9	$	4,843
Options granted		—			—
Options exercised		(202,355	)		1.35
Options canceled		(89,102	)		12.02
Balance, October 31, 2016		1,796,127		$	5.75		7.3	$	6,413
Vested and exercisable, October 31, 2016		954,691		$	4.39		6.4	$	4,564
Vested and expected to vest, October 31, 2016		1,796,127		$	5.75		7.3	$	6,413

The aggregate intrinsic value in the table above represents the difference between the exercise price of the options to purchase common stock and the Company’s closing stock price of $8.65 per share as of October 31, 2016. The aggregate intrinsic value of options exercised for the three months ended October 31, 2016 and 2015 was $0.3 million and $0.2 million, respectively, and $1.3 million and $0.8 million for the nine months ended October 31, 2016 and 2015, respectively.

Restricted Stock Units

Restricted Stock Units (RSUs) were granted to employees, non-employee board members and consultants. These RSUs are subject to a time-based vesting condition, which ranges from one to four years.

A summary of the Company’s RSU activity and related information for the nine months ended October 31, 2016 is as follows:

	Number of Shares			Weighted-Average Grant-Date Fair Value Per Share		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016		1,056,905		$	9.60		1.43	$	7,176
RSUs granted		1,521,250			7.16
RSUs vested		(549,747	)		9.09
RSUs canceled		(127,175	)		8.07
Balance as of October 31, 2016		1,901,233		$	7.56		1.54	$	16,446

During the nine months ended October 31, 2016 and 2015, the Company paid $1.3 million and $0 million, respectively, of shares repurchased for tax withholding purpose on the vested RSUs and classified the payments as financing cash outflows in the condensed consolidated statements of cash flows.

Common Stock Warrants

As of October 31, 2016, the Company had warrants to purchase 97,931 shares of common stock with exercise prices ranging from $4.70 to $6.04 per share. These common warrants have expiration dates through January 2025.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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+ Details

Stock-Based Compensation

9 Months Ended

Oct. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

9. Stock-Based Compensation

The total stock-based compensation the Company recognized for stock-based awards in the condensed consolidated statements of operations is as follows (in thousands):

	Three Months Ended October 31,				Nine Months Ended October 31,
	2016		2015		2016		2015
Total cost of revenue	$	264	$	138	$	742	$	261
Sales and marketing		348		194		1,029		323
Research and development		873		487		2,680		943
General and administrative		885		617		2,792		1,198
Total stock-based compensation expense	$	2,370	$	1,436	$	7,243	$	2,725

The following table presents stock-based compensation expense by award-type (in thousands):

	Three Months Ended October 31,				Nine Months Ended October 31,
	2016		2015		2016		2015
Stock options	$	563	$	656	$	1,877	$	1,898
Restricted stock units		1,594		575		4,614		604
Employee stock purchase plan		213		205		752		223
Total stock-based compensation expense	$	2,370	$	1,436	$	7,243	$	2,725

As of October 31, 2016, there was $3.7 million, $13.5 million and $1.3 million of unrecognized share-based compensation expense, related to non-vested stock option grants, unvested RSUs and ESPP, respectively, which will be recognized on a straight-line basis over the remaining weighted-average vesting periods of approximately 1.8 years, 2.8 years and 1.1 years, respectively.

Total outstanding non-employee stock options were 52,722 and 88,699 at October 31, 2016 and 2015, respectively. The total outstanding non-employee RSUs were 68,907 and 70,500 at October 31, 2016 and 2015, respectively. The non-employee stock-based compensation expense for the stock options and RSUs was not material for any of the periods presented.

Prior to the Company’s IPO, the fair value of the shares of common stock underlying stock options was historically established by the Company’s Board of Directors, and was based in part upon a valuation provided by an independent third-party valuation firm. Subsequent to the completion of the IPO, the Company uses the closing price of common stock as reported on the New York Stock Exchange on the grant date. The Company has consistently used peer company volatilities for calculating the expected volatilities for employee stock options and the ESPP. The expected term of options granted to employees is based on the simplified method as the Company does not have sufficient historical exercise data, and the expected term of the ESPP is based on the contractual term. The risk-free interest rate for the expected term of the options and the ESPP is based on the U.S. Treasury yield curve in effect at the time of grant. The Company recognizes its stock-based compensation related to options and RSUs using a straight-line method over the vesting term. The Company recognizes its stock-based compensation related to ESPP using a straight-line method over the offering period.

The Company did not grant any stock options during the nine months ended October 31, 2016. For the three and nine months ended October 31, 2015 the fair value of employee stock options grants was estimated using the Black–Scholes model with the following assumptions:

	Three Months Ended October 31,	Nine Months Ended October 31,
	2015	2015
Stock Options:
Expected volatility	54%-57%	54%-62%
Expected term (in years)	5.8-6.1	5.3-6.1
Risk-free interest rate	1.6%-1.7%	1.6%-1.9%
Dividend yield	— %	— %

For the three and nine months ended October 31, 2016 and 2015 the fair value of the Company’s employee stock purchase plan was estimated using the Black – Scholes model with the following assumptions:

	Three Months Ended October 31,		Nine Months Ended October 31,
	2016	2015	2016	2015
ESPP:
Expected volatility	37%-44%	38%-44%	37%-50%	35%-44%
Expected term (in years)	0.5-2.0	0.4-1.9	0.5-2.0	0.7-2.2
Risk-free interest rate	0.5%-0.7%	0.3%-0.8%	0.5%-1.0%	0.1%-0.8%
Dividend yield	— %	— %	— %	— %

Early Exercise of Common Stock

During the three and nine months ended October 31, 2016, the Company issued 12,614 shares and 110,603 shares of common stock following the exercise of common stock options prior to their vesting dates, or early exercises. During the three months ended October 31, 2016, no common stock options were early exercised. During the nine months ended October 31, 2016, 1,771 common stock options were early exercised prior to their vesting. The amounts received from all such early exercises is recorded in accrued expenses and other long-term liabilities on the consolidated balance sheets and reclassified to stockholders’ equity as the options vest. The unvested shares are subject to the Company’s repurchase right at the original purchase price, which lapses over the vesting term of the original option grant. As of October 31, 2016 and January 31, 2016, the aggregate proceeds from exercises of common stock options subject to repurchase recorded in accrued expenses and other long-term liabilities totaled $0.1 million and $0.2 million, respectively.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Basic and Diluted Net Loss Per Share

9 Months Ended

Oct. 31, 2016

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

Note 11. Basic and Diluted Net Loss Per Share

Basic and diluted net loss per share is calculated by dividing the net loss allocable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share of common stock is the same as basic net loss per share of common stock, since the effects of potentially dilutive securities are antidilutive. Upon completion of the IPO on July 22, 2015, all outstanding convertible preferred stock was converted to common stock and are included in the weighted average number of common shares used to compute net loss per share from the conversion date.

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 October 31,						Nine Months Ended October 31,
	2016			2015			2016			2015
Numerator
Net loss	$	(2,821	)	$	(3,531	)	$	(10,117	)	$	(10,869	)
Denominator
Weighted-average common shares for basic and diluted net loss per share		17,648,251			16,703,852			17,337,682			7,875,761
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.58	)	$	(1.38	)

The following table sets forth the potential shares of common stock that were excluded from diluted weighted-average common shares outstanding:

	Three and Nine Months Ended October 31,
	2016		2015
Options to purchase common stock		1,796,127		2,189,301
Employee stock purchase plan		339,543		400,487
Restricted stock units		1,901,233		948,655
Warrants to purchase common stock		97,931		163,955
Common stock subject to repurchase		66,439		255,706
Potential shares excluded from diluted net loss per share		4,201,273		3,958,104

Description of Business and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Oct. 31, 2016

Accounting Policies [Abstract]

Basis of Presentation

Reverse Stock Split

Initial Public Offering and Conversion of Preferred Stock

Use of Estimates

Concentration of Credit Risk

Concentration of Risk

The concentration of accounts receivable as of October 31, 2016 and January 31, 2016, respectively are as follows:

	As of
	October 31, 2016		January 31, 2016
Customer A		16%		13%
Customer B		10%	*

*	Represented less than 10% of accounts receivable, net as of January 31, 2016

There were no customers that individually exceeded 10% of revenue during the three and nine months ended October 31, 2016 and 2015.

Recently Adopted Accounting Standard

Recent Accounting Pronouncements Not Yet Adopted

Fair Value Measurement (Tables)

9 Months Ended

Oct. 31, 2016

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):

	As of October 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	3,078	$	—	$	—	$	3,078
Total cash equivalents	$	3,078	$	—	$	—	$	3,078
Cash								3,230
Total Cash and cash equivalents							$	6,308

Short-term investments:
Corporate debt securities	$	—	$	11,693	$	—	$	11,693
Commercial paper		—		9,376		—		9,376
U.S. agency securities		—		6,574		—		6,574
U.S. government securities		18,059		—		—		18,059
Asset-backed securities		—		1,352		—		1,352
Total short-term investments	$	18,059	$	28,995	$	—	$	47,054

	As of January 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash and cash equivalents:
Money market funds	$	3,462	$	—	$	—	$	3,462
Commercial paper		—		3,499		—		3,499
Total cash equivalents	$	3,462	$	3,499	$	—	$	6,961
Cash								20,452
Total Cash and cash equivalents							$	27,413

Short-term investments:
Corporate debt securities	$	—	$	7,845	$	—	$	7,845
Commercial paper		—		4,986		—		4,986
U.S. agency securities		—		7,666		—		7,666
U.S. government securities		7,494		—		—		7,494
Total short-term investments	$	7,494	$	20,497	$	—	$	27,991

Liabilities:
Acquisition-related contingent consideration	$	—	$	—	$	288	$	288
Total liabilities	$	—	$	—	$	288	$	288

Schedule of Changes in Level 3 Fair Value Category

Changes in the Level 3 fair value category for the periods presented were as follows (in thousands):

	Acquisition-Related Contingent Consideration
Balance at January 31, 2016	$	288
Payout of consideration		(123	)
Issuance of shares		(165	)
Balance at October 31, 2016	$	—

Short-term Investments (Tables) - Short-term Investments [Member]

9 Months Ended

Oct. 31, 2016

Schedule Of Available For Sale Securities [Line Items]

Summary of Short-term Investments

Short-term investments consisted of the following (in thousands):

	As of October 31, 2016
	Amortized Cost		Unrealized Losses			Unrealized Gains		Fair Value
Corporate debt securities	$	11,697	$	(5	)	$	1	$	11,693
Commercial paper		9,376		—			—		9,376
U.S. agency securities		6,567		—			7		6,574
U.S. government securities		18,044		—			15		18,059
Asset-backed securities		1,352		—			—		1,352
Total short-term investments	$	47,036	$	(5	)	$	23	$	47,054

	As of January 31, 2016
	Amortized Cost		Unrealized Losses			Unrealized Gains		Fair Value
Corporate debt securities	$	7,851	$	(6	)	$	—	$	7,845
Commercial paper		4,985		—			1		4,986
U.S. agency securities		7,661		—			5		7,666
U.S. government securities		7,477		—			17		7,494
Total short-term investments	$	27,974	$	(6	)	$	23	$	27,991

Schedule of Cost Basis and Fair Value of Short-term Investments by Contractual Maturity

The cost basis and fair value of the short-term investments by contractual maturity were as follows (in thousands):

	As of October 31, 2016				As of January 31, 2016
	Amortized Value		Fair Value		Amortized Value		Fair Value
One year or less	$	41,485	$	41,495	$	19,143	$	19,145
Over one year and less than two years		5,551		5,559		8,831		8,846
Total	$	47,036	$	47,054	$	27,974	$	27,991

Schedule of Investments in Unrealized Loss Position

Investments in an unrealized loss position consisted of the following (in thousands):

	As of October 31, 2016					As of January 31, 2016
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate debt securities	$	11,693	$	(5	)	$	7,845	$	(6	)

- 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)

9 Months Ended

Oct. 31, 2016

Balance Sheet Components [Abstract]

Components of Inventories

The components of inventories were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Finished goods	$	3,792	$	4,633
Raw material		800		378
Total inventory	$	4,592	$	5,011

Components of Deferred Revenue

The components of deferred revenue were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Deferred revenue:
Subscription and services	$	13,453	$	11,954
Product and other		1,915		3,118
Total deferred revenue		15,368		15,072
Less: current portion of deferred revenue		14,899		15,036
Deferred revenue, noncurrent portion included in other liabilities	$	469	$	36

Components of Accrued Expenses

The components of accrued expenses were as follows (in thousands):

	October 31,		January 31,
	2016		2016
Accrued regulatory fees and taxes	$	4,186	$	5,216
Accrued payroll and related expenses		3,842		3,559
Acquisition-related contingent consideration-current portion		—		288
Other accrued expenses		3,944		3,947
Total accrued expenses	$	11,972	$	13,010

Stockholders' Equity (Tables)

9 Months Ended

Oct. 31, 2016

Equity [Abstract]

Summary of Stock Option Activity Plans

Summary of option activity under the Company’s 2005 Plan and 2015 Plan for the nine months ended October 31, 2016 is set forth below:

	Options Outstanding
	Number of					Weighted
	Shares			Weighted		Average		Aggregate
	Underlying			Average		Remaining		Intrinsic
	Outstanding			Exercise		Contractual Term		Value
	Options			Price		(Years)		(in thousands)
Balance, January 31, 2016		2,087,584		$	5.59		7.9	$	4,843
Options granted		—			—
Options exercised		(202,355	)		1.35
Options canceled		(89,102	)		12.02
Balance, October 31, 2016		1,796,127		$	5.75		7.3	$	6,413
Vested and exercisable, October 31, 2016		954,691		$	4.39		6.4	$	4,564
Vested and expected to vest, October 31, 2016		1,796,127		$	5.75		7.3	$	6,413

Summary of Restricted Stock Units Activity

A summary of the Company’s RSU activity and related information for the nine months ended October 31, 2016 is as follows:

	Number of Shares			Weighted-Average Grant-Date Fair Value Per Share		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016		1,056,905		$	9.60		1.43	$	7,176
RSUs granted		1,521,250			7.16
RSUs vested		(549,747	)		9.09
RSUs canceled		(127,175	)		8.07
Balance as of October 31, 2016		1,901,233		$	7.56		1.54	$	16,446

Stock-Based Compensation (Tables)

9 Months Ended

Oct. 31, 2016

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

The total stock-based compensation the Company recognized for stock-based awards in the condensed consolidated statements of operations is as follows (in thousands):

	Three Months Ended October 31,				Nine Months Ended October 31,
	2016		2015		2016		2015
Total cost of revenue	$	264	$	138	$	742	$	261
Sales and marketing		348		194		1,029		323
Research and development		873		487		2,680		943
General and administrative		885		617		2,792		1,198
Total stock-based compensation expense	$	2,370	$	1,436	$	7,243	$	2,725

Stock-Based Compensation Expense by Award Type

The following table presents stock-based compensation expense by award-type (in thousands):

	Three Months Ended October 31,				Nine Months Ended October 31,
	2016		2015		2016		2015
Stock options	$	563	$	656	$	1,877	$	1,898
Restricted stock units		1,594		575		4,614		604
Employee stock purchase plan		213		205		752		223
Total stock-based compensation expense	$	2,370	$	1,436	$	7,243	$	2,725

ESPP

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

	Three Months Ended October 31,		Nine Months Ended October 31,
	2016	2015	2016	2015
ESPP:
Expected volatility	37%-44%	38%-44%	37%-50%	35%-44%
Expected term (in years)	0.5-2.0	0.4-1.9	0.5-2.0	0.7-2.2
Risk-free interest rate	0.5%-0.7%	0.3%-0.8%	0.5%-1.0%	0.1%-0.8%
Dividend yield	— %	— %	— %	— %

Stock Options

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

For the three and nine months ended October 31, 2015 the fair value of employee stock options grants was estimated using the Black–Scholes model with the following assumptions:

	Three Months Ended October 31,	Nine Months Ended October 31,
	2015	2015
Stock Options:
Expected volatility	54%-57%	54%-62%
Expected term (in years)	5.8-6.1	5.3-6.1
Risk-free interest rate	1.6%-1.7%	1.6%-1.9%
Dividend yield	— %	— %

Basic and Diluted Net Loss Per Share (Tables)

9 Months Ended

Oct. 31, 2016

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 October 31,						Nine Months Ended October 31,
	2016			2015			2016			2015
Numerator
Net loss	$	(2,821	)	$	(3,531	)	$	(10,117	)	$	(10,869	)
Denominator
Weighted-average common shares for basic and diluted net loss per share		17,648,251			16,703,852			17,337,682			7,875,761
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.58	)	$	(1.38	)

Potential Shares of Common Stock Excluded from Diluted Weighted-Average Common Shares Outstanding

The following table sets forth the potential shares of common stock that were excluded from diluted weighted-average common shares outstanding:

	Three and Nine Months Ended October 31,
	2016		2015
Options to purchase common stock		1,796,127		2,189,301
Employee stock purchase plan		339,543		400,487
Restricted stock units		1,901,233		948,655
Warrants to purchase common stock		97,931		163,955
Common stock subject to repurchase		66,439		255,706
Potential shares excluded from diluted net loss per share		4,201,273		3,958,104

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 06, 2015	Jul. 31, 2015 USD ($) $ / shares shares	Oct. 31, 2016 USD ($) Customer shares	Oct. 31, 2015 Customer	Oct. 31, 2016 USD ($) Customer shares	Oct. 31, 2015 Customer	Jan. 31, 2016 shares
Summary Of Significant Accounting Policies [Line Items]
Date of Incorporation of Company					Nov. 19, 2003
Reverse stock split ratio	0.5
Common stock, shares issued \| shares			17,892,367		17,892,367		16,916,250
Number of customers that individually exceeded 10% of revenue \| Customer			0	0	0	0
Accounting Standard Update ("ASU") 2016-09
Summary Of Significant Accounting Policies [Line Items]
Cumulative-effect adjustment to accumulated deficit and additional paid-in capital			$ 0.1		$ 0.1
Initial Public Offering
Summary Of Significant Accounting Policies [Line Items]
Common stock, shares issued \| shares		5,000,000	5,000,000		5,000,000
Public offering price \| $ / shares		$ 13.00
Net proceeds from issuance of common stock		$ 56.9
Underwriters discounts and commissions related to stock issuance		4.5
Offering cost related to stock issuance		$ 3.6

Fair Value Measurement - Schedule of Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Assets:
Total Cash and cash equivalents	$ 6,308	$ 27,413
Total short-term investments	47,054	27,991
Liabilities:
Total liabilities		288
Corporate Debt Securities
Assets:
Total short-term investments	11,693	7,845
Commercial Paper
Assets:
Total short-term investments	9,376	4,986
U.S. Agency Securities
Assets:
Total short-term investments	6,574	7,666
U.S. Government Securities
Assets:
Total short-term investments	18,059	7,494
Asset-backed Securities
Assets:
Total short-term investments	1,352
Cash Equivalents
Assets:
Total Cash and cash equivalents	3,078	6,961
Cash Equivalents \| Money Market Funds
Assets:
Total Cash and cash equivalents	3,078	3,462
Cash Equivalents \| Commercial Paper
Assets:
Total Cash and cash equivalents		3,499
Cash
Assets:
Total Cash and cash equivalents	3,230	20,452
Acquisition-Related Contingent Consideration
Liabilities:
Total liabilities		288
Level 1
Assets:
Total short-term investments	18,059	7,494
Level 1 \| U.S. Government Securities
Assets:
Total short-term investments	18,059	7,494
Level 1 \| Cash Equivalents
Assets:
Total Cash and cash equivalents	3,078	3,462
Level 1 \| Cash Equivalents \| Money Market Funds
Assets:
Total Cash and cash equivalents	3,078	3,462
Level 2
Assets:
Total short-term investments	28,995	20,497
Level 2 \| Corporate Debt Securities
Assets:
Total short-term investments	11,693	7,845
Level 2 \| Commercial Paper
Assets:
Total short-term investments	9,376	4,986
Level 2 \| U.S. Agency Securities
Assets:
Total short-term investments	6,574	7,666
Level 2 \| Asset-backed Securities
Assets:
Total short-term investments	$ 1,352
Level 2 \| Cash Equivalents
Assets:
Total Cash and cash equivalents		3,499
Level 2 \| Cash Equivalents \| Commercial Paper
Assets:
Total Cash and cash equivalents		3,499
Level 3
Liabilities:
Total liabilities		288
Level 3 \| Acquisition-Related Contingent Consideration
Liabilities:
Total liabilities		$ 288

Balance Sheet Components - Components of Deferred Revenue (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 15,368	$ 15,072
Less: current portion of deferred revenue	14,899	15,036
Deferred revenue, noncurrent portion included in other liabilities	469	36
Subscription and Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	13,453	11,954
Product and Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,915	$ 3,118

- 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

Debt - Additional Information (Details) - USD ($)	1 Months Ended						3 Months Ended		9 Months Ended
Debt - Additional Information (Details) - USD ($)	Jul. 31, 2016	Jul. 31, 2015	Jan. 31, 2015	Jul. 31, 2014	Dec. 31, 2012	Apr. 30, 2012	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Jan. 31, 2016	Jun. 30, 2009	May 31, 2009
Debt Instrument [Line Items]
Warrant to purchase convertible preferred stock												55,696	55,696
Exercise price per share of warrants											$ 4.70
Interest expense							$ 0	$ 10,000	$ 18,000	$ 900,000
Amortization of debt issuance costs							0	0	0	100,000
Write-off of non-cash deferred debt issuance costs								$ 0		$ 332,000
Outstanding debt on equipment acquired under capital lease							$ 0		$ 0		$ 600,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, maturity period					2014-12
Debt instrument, extended maturity period	2016-08			2016-07
Debt instrument, maturity description									The Revolver matured in August 2016.
Revolving credit line			$ 12,000,000
Term Debt \| Secured Debt Agreement
Debt Instrument [Line Items]
Debt instrument, maturity period						2015-09
Repayment of outstanding balance		$ 5,300,000
New Term Loan
Debt Instrument [Line Items]
Repayment of outstanding balance		$ 5,000,000
Revolving credit line			$ 10,000,000
Credit facility, maturity date			Jan. 05, 2018
Warrant to purchase convertible preferred stock			76,630
Exercise price per share of warrants			$ 6.04
Warrants, exercisable date			2025-01

Convertible Preferred Stock Warrant Liability - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				3 Months Ended		9 Months Ended
	Jul. 31, 2015	Oct. 31, 2014	Dec. 31, 2012	Apr. 30, 2012	Jan. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Dec. 31, 2010	Jun. 30, 2009	May 31, 2009
Class Of Stock [Line Items]
Warrants to purchase convertible preferred stock outstanding					0		0
Payment for warrant holders							$ 0.6
Warrant to purchase convertible preferred stock										55,696	55,696
Warrants issued to purchase convertible preferred stock		66,026	66,026	66,026
Warrant conversion ratio	100.00%
Conversion of warrants to common stock					66,026
Exercise price per share of warrants					$ 4.70
Warrants exercised, net					21,421
Series Alpha Convertible Preferred Stock
Class Of Stock [Line Items]
Warrants to purchase convertible preferred stock outstanding									70,287
December 2010 warrant
Class Of Stock [Line Items]
Remeasurement loss from change in fair value of warrants						$ 0.0		$ 0.1
May and June 2009 warrants
Class Of Stock [Line Items]
Remeasurement loss from change in fair value of warrants						0.0		0.1
Aggregate liability	$ 0.4
April 2012, December 2012 and October 2014 warrants
Class Of Stock [Line Items]
Remeasurement loss from change in fair value of warrants						$ 0.0		$ 0.3
Aggregate liability	$ 0.7

Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2016 shares	Oct. 31, 2016 USD ($) $ / shares shares	Oct. 31, 2015 USD ($)	Oct. 31, 2016 USD ($) Peroid Purchase $ / shares shares	Oct. 31, 2015 USD ($)	Jan. 31, 2016 $ / shares shares	Jul. 31, 2015 shares	Jul. 06, 2015 $ / shares shares
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares authorized		100,000,000		100,000,000		100,000,000		100,000,000
Common stock, par value \| $ / shares		$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001
Preferred stock, shares authorized		100,000,000		100,000,000		100,000,000		10,000,000
Preferred stock, par value \| $ / shares		$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001
Common stock, shares outstanding		17,892,367		17,892,367		16,916,250
Common stock, shares issued		17,892,367		17,892,367		16,916,250
Preferred stock, shares issued		0		0		0
Preferred stock, shares outstanding		0		0		0
Stock-based compensation \| $		$ 2,370	$ 1,436	$ 7,243	$ 2,725
Exercise price per share of warrants \| $ / shares						$ 4.70
Common Stock Warrants
Stockholders Equity Note Disclosure [Line Items]
Warrants expiration period				2025-01
Shares of common stock		97,931		97,931
Maximum \| Common Stock Warrants
Stockholders Equity Note Disclosure [Line Items]
Exercise price per share of warrants \| $ / shares		$ 6.04		$ 6.04
Minimum \| Common Stock Warrants
Stockholders Equity Note Disclosure [Line Items]
Exercise price per share of warrants \| $ / shares		$ 4.70		$ 4.70
Stock Options
Stockholders Equity Note Disclosure [Line Items]
Stock-based compensation \| $		$ 563	656	$ 1,877	1,898
Employee stock option expiration period				10 years
Closing price of common stock \| $ / shares		$ 8.65		$ 8.65
Aggregate intrinsic value of options exercised \| $		$ 300	200	$ 1,300	800
Stock Options \| Maximum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period				5 years
Restricted Stock Units (RSUs)
Stockholders Equity Note Disclosure [Line Items]
Stock-based compensation \| $		$ 1,594	575	$ 4,614	604
Shares repurchased for tax withholding purpose on vested RSUs \| $				$ 1,340	0
Restricted Stock Units (RSUs) \| Maximum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period				4 years
Restricted Stock Units (RSUs) \| Minimum
Stockholders Equity Note Disclosure [Line Items]
Employee stock option vesting period				1 year
2015 Equity Incentive Plan
Stockholders Equity Note Disclosure [Line Items]
Number of shares initially reserved under the plan		4,433,102		4,433,102
Additional aggregate number of shares issued under the plan	854,483			2,205,828
Percentage of common stock outstanding				5.00%
Common stock available for future issuance		984,031		984,031
Initial Public Offering
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares issued		5,000,000		5,000,000			5,000,000
Initial Public Offering \| 2015 Equity Incentive Plan
Stockholders Equity Note Disclosure [Line Items]
Percentage of common stock outstanding				10.00%
ESPP
Stockholders Equity Note Disclosure [Line Items]
Additional aggregate number of shares issued under the plan	341,793
Maximum of shares initially authorized for future issuance		441,165		441,165
Percentage of eligible compensation subject to plan limitation		15.00%		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%
Incremental compensation charge to be recognized over the remaining life \| $				$ 300
Stock-based compensation \| $		$ 213	$ 205	$ 752	$ 223
ESPP \| Common Stock
Stockholders Equity Note Disclosure [Line Items]
Number of common stock shares issued under ESPP				234,792
Weighted average purchase price of shares under ESPP \| $ / shares		$ 5.01		$ 5.01
Number of employee stock purchases \| Purchase				2

Stockholders' Equity - Summary of Stock Option Activity Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2016	Jan. 31, 2016
Number of Shares Underlying Outstanding Options
Number of Shares Underlying Outstanding Options, Beginning balance	2,087,584
Number of Shares Underlying Outstanding Options, Options exercised	(202,355)
Number of Shares Underlying Outstanding Options, Options canceled	(89,102)
Number of Shares Underlying Outstanding Options, Ending balance	1,796,127	2,087,584
Number of Shares Underlying Outstanding Options, Vested and exercisable	954,691
Number of Shares Underlying Outstanding Options, Vested and expected to vest	1,796,127
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning balance	$ 5.59
Weighted Average Exercise Price, Options exercised	1.35
Weighted Average Exercise Price, Options canceled	12.02
Weighted Average Exercise Price, Ending balance	5.75	$ 5.59
Weighted Average Exercise Price, Vested and exercisable	4.39
Weighted Average Exercise Price, Vested and expected to vest	$ 5.75
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term	7 years 3 months 18 days	7 years 10 months 24 days
Weighted Average Remaining Contractual Term, Vested and exercisable	6 years 4 months 24 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	7 years 3 months 18 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Options Outstanding	$ 6,413	$ 4,843
Aggregate Intrinsic Value, Vested and exercisable	4,564
Aggregate Intrinsic Value, Vested and expected to vest	$ 6,413

Stockholders' Equity - Summary of Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2016	Jan. 31, 2016
Number of Shares
Number of Shares, RSUs Beginning Balance	1,056,905
Number of Shares, RSUs granted	1,521,250
Number of Shares, RSUs vested	(549,747)
Number of Shares, RSUs canceled	(127,175)
Number of Shares, RSUs Ending Balance	1,901,233	1,056,905
Weighted-Average Grant-Date Fair Value Per Share
Weighted-Average Grant-Date Fair Value Per Share, Beginning Balance	$ 9.60
Weighted-Average Grant-Date Fair Value Per Share, RSUs granted	7.16
Weighted-Average Grant-Date Fair Value Per Share, RSUs vested	9.09
Weighted-Average Grant-Date Fair Value Per Share, RSUs canceled	8.07
Weighted-Average Grant-Date Fair Value Per Share, Ending Balance	$ 7.56	$ 9.60
Weighted-Average Remaining Contractual Life
Weighted-Average Remaining Contractual Life	1 year 6 months 15 days	1 year 5 months 5 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 16,446	$ 7,176

Debt	9 Months Ended
Debt	Oct. 31, 2016
Debt Disclosure [Abstract]
Debt	5. Debt In April 2012, the Company entered into a secured debt agreement (“Term Debt”) with its current lender, with original maturity of September 2015. In December 2012, the Company amended the secured debt agreement, adding a revolving line of credit (“the Revolver”) with original maturity of December 2014. In July 2014, the Company entered into an amended agreement to extend the maturity date of the Revolver until July 2016. In July 2015, the Company paid off the outstanding balance of $5.3 million under the Term Debt and the Revolver using a portion of the IPO proceeds. In July 2016, the Company entered into an amended agreement to extend the maturity of the Revolver to August 2016. The Revolver matured in August 2016. In January 2015, the Company entered into an amended line of credit under a loan and security agreement with its current lender which increased the amount available under the Revolver to $12.0 million and added a new term loan (“Term Loan”) of up to $10.0 million. The original maturity date of the Term Loan was January 2018. In connection with the agreement, the Company issued warrants to purchase 76,630 shares of the Company’s common stock with an exercise price of $6.04 per share that are exercisable until January 2025. As of October 31, 2016, these warrants remained outstanding. In July 2015, the Company repaid the outstanding Term Loan of $5.0 million using a portion of the IPO proceeds. The Company had certain non-financial covenants in connection with the borrowings. As of January 31, 2016, the Company was in compliance with all debt covenants. Total interest expense recognized was zero and $10,000 for the three months ended October 31, 2016 and 2015, respectively, and $18,000 and $0.9 million for the nine months ended October 31, 2016 and 2015, respectively. Total amortization of debt issuance costs recognized was zero for the three months ended October 31, 2016 and 2015, respectively, and zero and $0.1 million for the nine months ended October 31, 2016 and 2015, respectively. Interest expense for the three and nine months ended October 31, 2015 also included zero and $0.3 million write-off of non-cash deferred issuance costs due to the repayment by the Company of the outstanding debt in July 2015. As of January 31, 2016, debt on the consolidated balance sheet related to equipment acquired under capital lease was $0.6 million, which was repaid by the Company in April 2016. As of October 31, 2016, the Company did not have any outstanding debt.

Income Taxes	9 Months Ended
Income Taxes	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 10. Income Taxes The Company did not record a provision or benefit for income taxes during the three and nine months ended October 31, 2016 and 2015. The Company continues to maintain a full valuation allowance against its net deferred tax assets. As of October 31, 2016, the Company had unrecognized tax benefits of $1.4 million, none of which would currently affect the Company's effective tax rate if recognized due to the Company's net 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 October 31, 2016 will significantly increase or decrease within the next twelve months. There was no interest expense or penalties related to unrecognized tax benefits recorded through October 31, 2016. 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.

Defined Contribution Plans	9 Months Ended
Defined Contribution Plans	Oct. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Defined Contribution Plans	12. Defined Contribution Plans The Company’s contributions to the 401(k) defined contribution plan, which are expensed immediately as compensation costs, were $0.1 million and $0.1 million for the three months ended October 31, 2016 and 2015, respectively, and $0.3 million and $0.2 million for the nine months ended October 31, 2016 and 2015, respectively.

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
	Apr. 30, 2016	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Operating Leased Assets [Line Items]
Operating lease expiration date					2020-11
Operating leases outstanding			$ 1,800,000		$ 1,800,000
Rent expense			500,000	$ 400,000	1,600,000	$ 1,200,000
Non-cancelable purchase commitments			$ 4,000,000		$ 4,000,000
Lease Agreement One
Operating Leased Assets [Line Items]
Capital lease of computer equipment maturity date		2016-12
Right to purchase the equipment, amount		$ 1
Repayments of capital lease obligations	$ 600,000

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2016	Jan. 31, 2016	Oct. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non employee stock options outstanding	52,722	52,722		88,699
Common stock, shares, Issued	12,614	110,603
Common stock options early exercised prior to vesting	0	1,771
Accrued expenses and other long-term liabilities	$ 0.1	$ 0.1	$ 0.2
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to non-vested stock option grants	3.7	$ 3.7
Stock-based compensation expenses recognized on straight line basis offering period		1 year 9 months 18 days
Number of Shares Underlying Outstanding Options, Options granted		0
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to non-vested stock option grants	$ 13.5	$ 13.5
Stock-based compensation expenses recognized on straight line basis offering period		2 years 9 months 18 days
Non employee stock options outstanding	1,901,233	1,901,233	1,056,905
Restricted Stock Units (RSUs) \| Non Employee
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non employee stock options outstanding	68,907	68,907		70,500
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to non-vested stock option grants	$ 1.3	$ 1.3
Stock-based compensation expenses recognized on straight line basis offering period		1 year 1 month 6 days

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Oct. 31, 2016	Jan. 31, 2016	Jul. 06, 2015
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000	100,000,000
Common stock, shares issued	17,892,367	16,916,250
Common stock, shares outstanding	17,892,367	16,916,250

Convertible Preferred Stock Warrant Liability	9 Months Ended
Convertible Preferred Stock Warrant Liability	Oct. 31, 2016
Equity [Abstract]
Convertible Preferred Stock Warrant Liability	6. Convertible Preferred Stock Warrant Liability In December 2010 the Company issued a warrant to purchase 70,287 shares of Series Alpha convertible preferred stock. The warrant was initially measured at its fair value and recorded as a derivative liability. On each reporting date the change in fair value of the warrant was determined based on Monte-Carlo model or IPO pricing on payout. During the three and nine months ended October 31, 2015, the Company recorded a remeasurement loss of $0 million and $0.1 million, respectively, in other expense, net in the condensed consolidated statement of operations. Upon the completion of the IPO, the fair value of the warrant was determined to be $0.6 million. The warrant was cash settled and the Company paid $0.6 million to the warrant holder from the IPO proceeds. In May and June 2009, the Company issued warrants to purchase 55,696 shares of Series Alpha convertible preferred stock. These warrants were initially measured at their fair value and recorded as a derivative liability. On each reporting date the change in fair value of the warrants were determined using the Black Scholes model. During the three and nine months ended October 31, 2015, the Company recorded a remeasurement loss of $0 million and $0.1 million, respectively, in other expense, net in the condensed consolidated statement of operations. Upon completion of the IPO in July, 2015, the total aggregate liability of $0.4 million related to these warrants was derecognized and reclassified to additional paid in capital which then automatically converted these warrants to purchase shares of Series Alpha convertible stock into warrants to purchase shares of common stock. In April 2012, December 2012 and October 2014, the Company issued warrants to purchase an aggregate of 66,026 shares of Series Alpha convertible preferred stock in connection with a debt agreement with a lender. The Company recorded the warrants as a derivative liability. The warrants were initially measured at fair value and remeasured at every reporting period date using Monte-Carlo valuation. During the three and nine months ended October 31, 2015, the Company recorded a remeasurement loss of $0 million and $0.3 million, respectively, in the condensed consolidated statement of operations. Upon completion of the IPO in July, 2015, the total aggregate liability of $0.7 million related to these warrants was derecognized and reclassified to additional paid in capital which then automatically converted these warrants to purchase shares of Series Alpha convertible stock into warrants to purchase shares of common stock on a 1:1 basis. During the fourth quarter of fiscal 2016, the lender net exercised warrants to purchase 66,026 shares of Series Alpha convertible stock at an exercise price of $4.70 per share to 21,421 shares of common stock. The Company did not have any outstanding warrants to purchase convertible preferred stock as of October 31, 2016 and January 31, 2016.

Fair Value Measurement - Additional Information (Details)	9 Months Ended
	Oct. 31, 2016 USD ($)
Fair Value Disclosures [Abstract]
Transfers into or out of the Level 3 category	$ 0

Fair Value Measurement - Schedule of Changes in Level 3 Fair Value Category (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	$ 288
Payout of consideration		$ 167
Acquisition-Related Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	288
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	288
Level 3 \| Acquisition-Related Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	288
Payout of consideration	(123)
Issuance of shares	$ (165)

Short-term Investments - Summary of Short-term Investment (Details) - Short-term Investments [Member] - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	$ 47,036	$ 27,974
Short-term Investments, Unrealized Losses	(5)	(6)
Short-term Investments, Unrealized Gains	23	23
Short-term Investments, Fair Value	47,054	27,991
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	11,697	7,851
Short-term Investments, Unrealized Losses	(5)	(6)
Short-term Investments, Unrealized Gains	1
Short-term Investments, Fair Value	11,693	7,845
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	9,376	4,985
Short-term Investments, Unrealized Gains		1
Short-term Investments, Fair Value	9,376	4,986
U.S. Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	6,567	7,661
Short-term Investments, Unrealized Gains	7	5
Short-term Investments, Fair Value	6,574	7,666
US Government Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	18,044	7,477
Short-term Investments, Unrealized Gains	15	17
Short-term Investments, Fair Value	18,059	$ 7,494
Asset-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	1,352
Short-term Investments, Fair Value	$ 1,352

Short-term Investments - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015
Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, gross realized gain (losses)	$ 0	$ 0

Short-term Investments - Schedule of Cost Basis and Fair Value of Short-term Investments by Contractual Maturity (Details) - Short-term Investments [Member] - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
One year or less, amortized cost	$ 41,485	$ 19,143
Over one year and less than two years, amortized cost	5,551	8,831
Short-term Investments, Amortized Cost	47,036	27,974
One year or less, fair value	41,495	19,145
Over one year and less than two years, fair value	5,559	8,846
Short-term Investments, Fair Value	$ 47,054	$ 27,991

Short-term Investments - Schedule of Investments in Unrealized Loss Position (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2016	Jan. 31, 2016
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Total short-term investments	$ 47,054	$ 27,991
Corporate Debt Securities
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Total short-term investments	11,693	7,845
Investments, Unrealized Losses	$ (5)	$ (6)

Balance Sheet Components - Components of Inventories (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Inventory Disclosure [Abstract]
Finished goods	$ 3,792	$ 4,633
Raw material	800	378
Total inventory	$ 4,592	$ 5,011

Balance Sheet Components - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Payables And Accruals [Abstract]
Accrued regulatory fees and taxes	$ 4,186	$ 5,216
Accrued payroll and related expenses	3,842	3,559
Acquisition-related contingent consideration-current portion		288
Other accrued expenses	3,944	3,947
Total accrued expenses	$ 11,972	$ 13,010

Basic and Diluted Net Loss Per Share - Potential Shares of Common Stock Excluded from Diluted Weighted-Average Common Shares Outstanding (Details) - shares	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	4,201,273	3,958,104
Employee stock purchase plan
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	339,543	400,487
Options to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	1,796,127	2,189,301
Restricted stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	1,901,233	948,655
Common stock subject to repurchase
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	66,439	255,706
Warrants to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	97,931	163,955