Ooma (OOMA) 10-Q 10 Jun 16 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Apr. 30, 2016	May. 31, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2016
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Trading Symbol	OOMA
Entity Registrant Name	Ooma Inc
Entity Central Index Key	1,327,688
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		17,215,797

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 8,982	$ 27,413
Short-term investments	44,695	27,991
Accounts receivable, net	5,022	5,609
Inventories	3,909	5,011
Deferred inventory costs	1,841	2,013
Prepaid expenses and other current assets	1,513	1,318
Total current assets	65,962	69,355
Property and equipment, net	4,272	4,291
Intangible assets, net	787	885
Goodwill	1,117	1,117
Other assets	830	888
Total assets	72,968	76,536
Current liabilities:
Accounts payable	4,160	4,786
Accrued expenses	11,979	13,010
Short-term capital lease		632
Deferred revenue	14,351	15,036
Total current liabilities	30,490	33,464
Other liabilities	238	182
Total liabilities	$ 30,728	$ 33,646
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock
Common stock	$ 2	$ 2
Additional paid-in capital	110,972	107,679
Accumulated other comprehensive income	30	17
Accumulated deficit	(68,764)	(64,808)
Total stockholders’ equity	42,240	42,890
Total liabilities and stockholders’ equity	$ 72,968	$ 76,536

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Apr. 30, 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	10,000,000	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000	100,000,000
Common stock, shares issued	17,190,777	16,916,250
Common stock, shares outstanding	17,190,777	16,916,250

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Revenue:
Subscription and services	$ 21,490	$ 15,576
Product and other	2,969	4,276
Total revenue	24,459	19,852
Cost of revenue:
Subscription and services	7,271	5,624
Product and other	3,539	4,207
Total cost of revenue	10,810	9,831
Gross profit	13,649	10,021
Operating expenses:
Sales and marketing	8,095	5,895
Research and development	5,741	4,097
General and administrative	3,855	2,961
Total operating expenses	17,691	12,953
Loss from operations	(4,042)	(2,932)
Other (expense) income:
Interest income (expense), net	64	(285)
Change in fair value of warrants		(716)
Other income (expense), net	22	(2)
Net loss	$ (3,956)	$ (3,935)
Net loss per share of common stock:
Basic and diluted	$ (0.23)	$ (1.52)
Weighted-average number of shares used in per share amounts:
Basic and diluted	17,059,986	2,591,241

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Loss	$ (3,956)	$ (3,935)
Other comprehensive income
Unrealized gain on short-term investments	13
Comprehensive loss	$ (3,943)	$ (3,935)

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Cash flows from operating activities:
Net loss	$ (3,956)	$ (3,935)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Stock-based compensation expense	2,474	551
Depreciation and amortization	389	316
Amortization of intangible assets	97	99
Non-cash interest expense		44
Change in fair value of acquisition-related contingent consideration		81
Change in fair value of warrant liability		716
Changes in operating assets and liabilities:
Accounts receivable, net	587	1,927
Inventories	1,103	(195)
Deferred inventory costs	172	1,311
Prepaid expenses and other assets	(110)	43
Accounts payable and accrued expenses	(1,373)	2,105
Other liabilities	(20)	392
Deferred revenue	(608)	(2,084)
Net cash (used in) provided by operating activities	(1,245)	1,371
Cash flows from investing activities:
Purchases of short-term investments	(19,260)
Proceeds from sale of short-term investments	2,500
Purchases of property and equipment	(321)	(408)
Net cash used in investing activities	(17,081)	(408)
Cash flows from financing activities:
Payment of deferred offering costs		(453)
Repayment of debt and capital leases	(628)	(534)
Payment of acquisition related earn-out	(100)	(475)
Proceeds from issuance of common stock related to warrants and employee stock benefit plans	623	1
Net cash (used in) provided by financing activities	(105)	3,539
Net (decrease) increase in cash and cash equivalents	(18,431)	4,502
Cash and cash equivalents at beginning of period	27,413	9,133
Cash and cash equivalents at end of period	$ 8,982	13,635
Series Beta Preferred Stock
Cash flows from financing activities:
Proceeds from Series Beta preferred stock, net		$ 5,000

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	3 Months Ended
	Apr. 30, 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 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, and 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. 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. Concentration of Risk The concentration of accounts receivable as of April 30, 2016 and January 31, 2016, respectively are as follows: As of April 30, 2016 January 31, 2016 Customer A 28 % 13 % There were no customers that individually exceeded 10% of revenue during the three months ended April 30, 2016 and 2015. Recent Accounting Pronouncements In March 2016, the Financial Accounting Standard Board (“FASB”) issued accounting standards update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU 2016-02, Leases In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes In July 2015, the FASB issued ASU No. 2015-11 (ASC 330) , Simplifying the Measurement of Inventory 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 In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers (ASC 606) Deferral of Effective Date

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Apr. 30, 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 three months ended April 30, 2016 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 three months ended April 30, 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 are as follows (in thousands): Balance as of April 30, 2016 Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents: Money market funds $ 4,306 $ — $ — $ 4,306 Commercial paper — 1,000 — 1,000 Total cash equivalents $ 4,306 $ 1,000 $ — $ 5,306 Cash 3,676 Total Cash and cash equivalents $ 8,982 Short-term investments: Corporate debt securities $ — $ 11,430 $ — $ 11,430 Commercial paper — 8,122 — 8,122 U.S. agency securities 8,669 — — 8,669 U.S. government securities 14,671 — — 14,671 Asset backed securities — 1,803 — 1,803 Total short-term investments $ 23,340 $ 21,355 $ — $ 44,695 Balance 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 are as follows (in thousands): Acquisition-Related Contingent Consideration Balance at January 31, 2016 $ 288 Payout of consideration (123 ) Issuance of shares (165 ) Balance at April 30, 2016 $ — The carrying value of the Company’s accounts receivable, inventory and other current assets and current liabilities approximates fair value due to short maturities.

Short-term Investments

Short-term Investments	3 Months Ended
	Apr. 30, 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 April 30, 2016 Amortized Cost Unrealized Losses Unrealized Gains Fair Value Corporate debt securities $ 11,433 $ (3 ) $ — $ 11,430 Commercial paper 8,122 — — 8,122 U.S. agency securities 8,659 — 10 8,669 U.S. government securities 14,648 — 23 14,671 Asset backed securities 1,803 — — 1,803 Total short-term investments $ 44,665 $ (3 ) $ 33 $ 44,695 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 months ended April 30, 2016. The Company did not have any gross realized gains and gross realized losses for the three months ended April 30, 2015. The cost basis and fair value of the short-term investments by contractual maturity consist of the following (in thousands): As of April 30, 2016 As of January 31, 2016 Amortized Value Fair Value Amortized Value Fair Value One year or less $ 34,892 $ 34,904 $ 19,143 $ 19,145 Over one year and less than two years 9,773 9,791 8,831 8,846 Total $ 44,665 $ 44,695 $ 27,974 $ 27,991 Prior to fiscal 2016 the Company held all its cash in cash and money market funds. Investments in an unrealized loss position consisted of the following (in thousands): As of April 30, 2016 As of January 31, 2016 Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 11,430 $ (3 ) $ 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 April 30, 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

Balance Sheet Components	3 Months Ended
	Apr. 30, 2016
Balance Sheet Components [Abstract]
Balance Sheet Components	4. Balance Sheet Components Inventories The following table shows the components of inventories (in thousands): April 30, January 31, 2016 2016 Finished goods $ 2,987 $ 4,633 Raw material 922 378 Total inventory $ 3,909 $ 5,011 Deferred Revenue The following table shows the components of deferred revenue (in thousands): April 30, January 31, 2016 2016 Deferred revenue: Subscription and services $ 12,052 $ 11,954 Product and other 2,412 3,118 Total deferred revenue 14,464 15,072 Less: current portion of deferred revenue 14,351 15,036 Deferred revenue, noncurrent portion included in other liabilities $ 113 $ 36 Accrued Expenses The following table shows the components of accrued expenses (in thousands): April 30, January 31, 2016 2016 Accrued regulatory fees and taxes $ 5,322 $ 5,216 Accrued payroll and related expenses 2,170 3,559 Acquisition-related contingent consideration-current portion — 288 Other accrued expenses 4,487 3,947 Total accrued expenses $ 11,979 $ 13,010

Debt

Debt	3 Months Ended
	Apr. 30, 2016
Debt Disclosure [Abstract]
Debt	5. Debt In April 2012 and December 2012 the Company entered into a secured debt agreement (“Term Debt”) and the line of credit (“the Revolver”) with its current lender with original maturity of September 2015 and July 2016, respectively. In July 2015, the Company repaid the outstanding debt of $5.3 million under these agreements using a portion of the IPO proceeds. 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 line of credit of up to $10.0 million. The original maturity date of the line of credit was January 2018. The Company repaid the outstanding debt of $5.0 million under the line of credit in July 2015 using a portion of the IPO proceeds. 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 April 30, 2016, these warrants remained outstanding. As of April 30, 2016, the amount available under the Revolver agreement was $12.0 million. The interest rate on the Revolver is 2.75% above the prime rate (3.5% at April 30, 2016). The Revolver includes a financial covenant that the Company is required to have a certain number of subscribers at the end of each quarter. The Revolver matures in July 2016. The Company has certain non-financial covenants in connection with the borrowings. As of April 30, 2016 and January 31, 2016, the Company was in compliance with all the covenants under the Revolver agreement. Total interest expense recognized was $18,000 and $0.3 million for the three months ended April 30, 2016 and 2015, respectively. Total amortization of debt issuance costs recognized was $0 and $44,000 for the three months ended April 30, 2016 and 2015, respectively. As of January 31, 2016, $0.6 million of the debt on the consolidated balance sheet related to equipment acquired under capital lease was repaid by the Company in April 2016.

Convertible Preferred Stock War

Convertible Preferred Stock Warrant Liability	3 Months Ended
	Apr. 30, 2016
Equity [Abstract]
Convertible Preferred Stock Warrant Liability	6. Convertible Preferred Stock Warrant Liability As of April 30, 2015, the Company had the following warrants to purchase convertible preferred stock outstanding: Fair value Warrants of Warrants outstanding Liabilities as of as of April 30, 2015 April 30, 2015 (in thousands) December 2010 warrant 70,287 $ 726 May and June 2009 warrants 55,696 596 April 2012, December 2012 and October 2014 warrants 66,026 611 Total 192,009 $ 1,933 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 months ended April 30, 2015, the Company recorded a remeasurement loss of $0.3 million in other income (expense) 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 months ended April 30, 2015, the Company recorded a remeasurement loss of $0.2 million in other income (expense) in the condensed consolidated statement of operations. As of April 30, 2015, the fair value of these warrants was determined using the following Black-Scholes assumptions: expected volatility of 70%, remaining contractual term of 1.14 years, risk-free interest rate of 0.3% and no dividend yield. 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 months ended April 30, 2015, the Company recorded a remeasurement loss of $0.2 million 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.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Apr. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies The Company leases office space in Palo Alto and Newark, California under operating leases. As of April 30, 2016, the Company had $2.8 million outstanding under operating leases with lease periods expiring through February 2018. 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 $0.3 million and $0.3 million for the three months ended April 30, 2016 and 2015, respectively. As of April 30, 2016, non-cancelable purchase commitments were $2.6 million. Legal Matters —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 Deep Green Wireless Litigation, Securities Litigation, Berks County Litigation and the Alabama Litigation proceedings described in Part II, Item 1 (“Legal 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. At this point in the proceedings, losses, if any, that are reasonably possible to result from this litigation are 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

Stockholders' Equity	3 Months Ended
	Apr. 30, 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 April 30 Equity Award Plans 2005 Stock Plan The Board of Directors adopted, and the stockholders approved, the Company’s 2005 Stock Plan (the “2005 Plan”) Plan was amended and restated in the form of the 2015 Equity Incentive Plan described below. The terms of the 2005 Plan as described in the Prospectus 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. T he 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. 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 April 30 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 three months ended April 30, 2016, there was a purchase of 116,629 shares at a 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. During the three months ended , the Company recorded stock-based compensation expense of $0.3 million. 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 three months ended April 30, 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 (63,019 ) 0.58 Options canceled (3,098 ) 17.44 Balance, April 30, 2016 2,021,467 5.73 7.7 $ 4,888 Vested and exercisable, April 30, 2016 801,739 $ 2.93 6.2 $ 3,677 Vested and expected to vest, April 30, 2016 1,954,948 $ 5.66 7.7 $ 4,823 Aggregate intrinsic value represents the difference between the exercise price of the options to purchase common stock and the fair market value of the Company’s common stock. The aggregate intrinsic value of options exercised for the three months ended , 2016 and 2015 was $0.4 million and $0.1 million, 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 three months ended April 30, 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 1,316,550 7.02 RSUs vested — — RSUs canceled (2,100 ) 5.57 Balance as of April 30, 2016 2,371,355 $ 7.90 1.66 $ 16,742 Common Stock Warrants As of April 30, 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.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Apr. 30, 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 April 30, 2016 2015 Total cost of revenue $ 235 $ 58 Sales and marketing 326 56 Research and development 944 217 General and administrative 969 220 Total stock-based compensation expense $ 2,474 $ 551 The following table presents stock-based compensation expense by award-type (in thousands): Three Months Ended April 30, 2016 2015 Stock options $ 684 $ 551 Restricted stock units 1,508 — Employee stock purchase plan 282 — Total stock-based compensation expense $ 2,474 $ 551 As of April 30 Total outstanding non-employee stock options were 62,750 and 67,884 at April 30 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 three months ended April 30, 2016. For the three months ended April 30 Three Months Ended April 30, 2015 Stock Options: Expected volatility 61%-62% Expected term (in years) 5.9-6.1 Risk-free interest rate 1.6%-1.8% Dividend yield — % The Company did not have an ESPP during the three months ended April 30, 2015. For the three months ended April 30 Three Months Ended April 30, 2016 ESPP: Expected volatility 44%-50% Expected term (in years) 0.5-2.0 Risk-free interest rate 0.5%-1.0% Dividend yield — % Early Exercise of Common Stock During the three months ended , 2016, the Company issued 68,504 shares of common stock following the exercise of common stock options prior to their vesting dates, or early exercises. 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 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.

Income Taxes

Income Taxes	3 Months Ended
	Apr. 30, 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 months ended April 30, 2016 and At April 30 April 30, 2016 April 30, 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.

Basic and Diluted Net Loss Per

Basic and Diluted Net Loss Per Share	3 Months Ended
	Apr. 30, 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 April 30, 2016 2015 Numerator Net loss $ (3,956 ) $ (3,935 ) Denominator Weighted-average common shares for basic and diluted net loss per share 17,059,986 2,591,241 Basic and diluted net loss per share $ (0.23 ) $ (1.52 ) The following table sets forth the potential shares of common stock that were excluded from diluted weighted-average common shares outstanding: Three Months Ended April 30, 2016 2015 Options to purchase common stock 2,021,467 1,956,293 Employee stock purchase plan 304,400 — Convertible preferred stock — 8,595,217 Restricted stock units 2,371,355 — Warrants to purchase convertible preferred stock — 192,009 Warrants to purchase common stock 97,931 87,828 Common stock subject to repurchase 103,538 423,572 Potential shares excluded from diluted net loss per share 4,898,691 11,254,919

Defined Contribution Plans

Defined Contribution Plans	3 Months Ended
	Apr. 30, 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 April 30, 2016 and 2015, respectively.

Subsequent Event

Subsequent Event	3 Months Ended
	Apr. 30, 2016
Subsequent Events [Abstract]
Subsequent Event	13. Subsequent Event 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. We have not yet been served with the complaint, and we plan to contest the claim vigorously. Based upon our brief preliminary investigation, we do not believe that our products infringe any valid or enforceable claim of the aforementioned patent, although the outcome of any litigation can never be certain. Based on our current knowledge, we have determined that the amount of any material loss or range of any losses that is reasonably possible to result from the Deep Green Wireless Litigation is not reasonably estimable

Description of Business and S20

Description of Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Apr. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	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 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	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	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	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, and 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 Credit Risk	Concentration of Risk The concentration of accounts receivable as of April 30, 2016 and January 31, 2016, respectively are as follows: As of April 30, 2016 January 31, 2016 Customer A 28 % 13 % There were no customers that individually exceeded 10% of revenue during the three months ended April 30, 2016 and 2015.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In March 2016, the Financial Accounting Standard Board (“FASB”) issued accounting standards update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU 2016-02, Leases In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes In July 2015, the FASB issued ASU No. 2015-11 (ASC 330) , Simplifying the Measurement of Inventory 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 In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers (ASC 606) Deferral of Effective Date

Description of Business and S21

Description of Business and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Apr. 30, 2016
Accounting Policies [Abstract]
Concentration of Accounts Receivable	The concentration of accounts receivable as of April 30, 2016 and January 31, 2016, respectively are as follows: As of April 30, 2016 January 31, 2016 Customer A 28 % 13 %

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Apr. 30, 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 are as follows (in thousands): Balance as of April 30, 2016 Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents: Money market funds $ 4,306 $ — $ — $ 4,306 Commercial paper — 1,000 — 1,000 Total cash equivalents $ 4,306 $ 1,000 $ — $ 5,306 Cash 3,676 Total Cash and cash equivalents $ 8,982 Short-term investments: Corporate debt securities $ — $ 11,430 $ — $ 11,430 Commercial paper — 8,122 — 8,122 U.S. agency securities 8,669 — — 8,669 U.S. government securities 14,671 — — 14,671 Asset backed securities — 1,803 — 1,803 Total short-term investments $ 23,340 $ 21,355 $ — $ 44,695 Balance 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 are as follows (in thousands): Acquisition-Related Contingent Consideration Balance at January 31, 2016 $ 288 Payout of consideration (123 ) Issuance of shares (165 ) Balance at April 30, 2016 $ —

Short-term Investments (Tables)

Short-term Investments (Tables) - Short-term Investments [Member]	3 Months Ended
	Apr. 30, 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 April 30, 2016 Amortized Cost Unrealized Losses Unrealized Gains Fair Value Corporate debt securities $ 11,433 $ (3 ) $ — $ 11,430 Commercial paper 8,122 — — 8,122 U.S. agency securities 8,659 — 10 8,669 U.S. government securities 14,648 — 23 14,671 Asset backed securities 1,803 — — 1,803 Total short-term investments $ 44,665 $ (3 ) $ 33 $ 44,695 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 consist of the following (in thousands): As of April 30, 2016 As of January 31, 2016 Amortized Value Fair Value Amortized Value Fair Value One year or less $ 34,892 $ 34,904 $ 19,143 $ 19,145 Over one year and less than two years 9,773 9,791 8,831 8,846 Total $ 44,665 $ 44,695 $ 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 April 30, 2016 As of January 31, 2016 Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 11,430 $ (3 ) $ 7,845 $ (6 )

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Apr. 30, 2016
Balance Sheet Components [Abstract]
Components of Inventories	The following table shows the components of inventories (in thousands): April 30, January 31, 2016 2016 Finished goods $ 2,987 $ 4,633 Raw material 922 378 Total inventory $ 3,909 $ 5,011
Components of Deferred Revenue	The following table shows the components of deferred revenue (in thousands): April 30, January 31, 2016 2016 Deferred revenue: Subscription and services $ 12,052 $ 11,954 Product and other 2,412 3,118 Total deferred revenue 14,464 15,072 Less: current portion of deferred revenue 14,351 15,036 Deferred revenue, noncurrent portion included in other liabilities $ 113 $ 36
Components of Accrued Expenses	The following table shows the components of accrued expenses (in thousands): April 30, January 31, 2016 2016 Accrued regulatory fees and taxes $ 5,322 $ 5,216 Accrued payroll and related expenses 2,170 3,559 Acquisition-related contingent consideration-current portion — 288 Other accrued expenses 4,487 3,947 Total accrued expenses $ 11,979 $ 13,010

Convertible Preferred Stock W25

Convertible Preferred Stock Warrant Liability (Tables)	3 Months Ended
	Apr. 30, 2016
Equity [Abstract]
Summary of Warrants to Purchase Convertible Preferred Stock Outstanding	As of April 30, 2015, the Company had the following warrants to purchase convertible preferred stock outstanding: Fair value Warrants of Warrants outstanding Liabilities as of as of April 30, 2015 April 30, 2015 (in thousands) December 2010 warrant 70,287 $ 726 May and June 2009 warrants 55,696 596 April 2012, December 2012 and October 2014 warrants 66,026 611 Total 192,009 $ 1,933

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Apr. 30, 2016
Equity [Abstract]
Summary of Stock Option Activity Plans	Summary of option activity under the Company’s 2005 Plan and 2015 Plan for the three months ended April 30, 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 (63,019 ) 0.58 Options canceled (3,098 ) 17.44 Balance, April 30, 2016 2,021,467 5.73 7.7 $ 4,888 Vested and exercisable, April 30, 2016 801,739 $ 2.93 6.2 $ 3,677 Vested and expected to vest, April 30, 2016 1,954,948 $ 5.66 7.7 $ 4,823
Summary of Restricted Stock Units Activity	A summary of the Company’s RSU activity and related information for the three months ended April 30, 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 1,316,550 7.02 RSUs vested — — RSUs canceled (2,100 ) 5.57 Balance as of April 30, 2016 2,371,355 $ 7.90 1.66 $ 16,742

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Apr. 30, 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 April 30, 2016 2015 Total cost of revenue $ 235 $ 58 Sales and marketing 326 56 Research and development 944 217 General and administrative 969 220 Total stock-based compensation expense $ 2,474 $ 551
Stock-Based Compensation Expense by Award Type	The following table presents stock-based compensation expense by award-type (in thousands): Three Months Ended April 30, 2016 2015 Stock options $ 684 $ 551 Restricted stock units 1,508 — Employee stock purchase plan 282 — Total stock-based compensation expense $ 2,474 $ 551
ESPP
Stock Options Valuation Assumptions Used to Calculate the Fair Value of Warrants	For the three months ended April 30 Three Months Ended April 30, 2016 ESPP: Expected volatility 44%-50% Expected term (in years) 0.5-2.0 Risk-free interest rate 0.5%-1.0% Dividend yield — %
Employee Stock Option
Stock Options Valuation Assumptions Used to Calculate the Fair Value of Warrants	For the three months ended April 30 Three Months Ended April 30, 2015 Stock Options: Expected volatility 61%-62% Expected term (in years) 5.9-6.1 Risk-free interest rate 1.6%-1.8% Dividend yield — %

Basic and Diluted Net Loss Pe28

Basic and Diluted Net Loss Per Share (Tables)	3 Months Ended
	Apr. 30, 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 April 30, 2016 2015 Numerator Net loss $ (3,956 ) $ (3,935 ) Denominator Weighted-average common shares for basic and diluted net loss per share 17,059,986 2,591,241 Basic and diluted net loss per share $ (0.23 ) $ (1.52 )
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 Months Ended April 30, 2016 2015 Options to purchase common stock 2,021,467 1,956,293 Employee stock purchase plan 304,400 — Convertible preferred stock — 8,595,217 Restricted stock units 2,371,355 — Warrants to purchase convertible preferred stock — 192,009 Warrants to purchase common stock 97,931 87,828 Common stock subject to repurchase 103,538 423,572 Potential shares excluded from diluted net loss per share 4,898,691 11,254,919

Description of Business and S29

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Millions	Jul. 06, 2015	Jul. 31, 2015USD ($)$ / sharesshares	Apr. 30, 2016Customershares	Apr. 30, 2015Customer	Jan. 31, 2016shares
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			17,190,777		16,916,250
Number of customers that individually exceeded 10% of revenue | Customer			0	0
Initial Public Offering
Summary Of Significant Accounting Policies [Line Items]
Common stock, shares issued | shares		5,000,000	5,000,000
Public offering price | $ / shares		$ 13
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

Description of Business and S30

Description of Business and Summary of Significant Accounting Policies - Concentration of Accounts Receivable (Details)	3 Months Ended	12 Months Ended
	Apr. 30, 2016	Jan. 31, 2016
Accounts Receivable | Customer Concentration Risk | Customer A
Concentration Risk [Line Items]
Concentration risk percentage	28.00%	13.00%

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Details)	3 Months Ended
	Apr. 30, 2016USD ($)
Fair Value Disclosures [Abstract]
Transfers into or out of the Level 3 category	$ 0

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Assets:
Total Cash and cash equivalents	$ 8,982	$ 27,413
Total short-term investments	44,695	27,991
Liabilities:
Total liabilities		288
Corporate Debt Securities
Assets:
Total short-term investments	11,430	7,845
U.S. Agency Securities
Assets:
Total short-term investments	8,669	7,666
U.S. Government Securities
Assets:
Total short-term investments	14,671	7,494
Asset-backed Securities
Assets:
Total short-term investments	1,803
Commercial Paper
Assets:
Total short-term investments	8,122	4,986
Cash Equivalents
Assets:
Total Cash and cash equivalents	5,306	6,961
Cash Equivalents | Money Market Funds
Assets:
Total Cash and cash equivalents	4,306	3,462
Cash Equivalents | Commercial Paper
Assets:
Total Cash and cash equivalents	1,000	3,499
Cash
Assets:
Total Cash and cash equivalents	3,676	20,452
Acquisition-Related Contingent Consideration
Liabilities:
Total liabilities		288
Level 1
Assets:
Total short-term investments	23,340	7,494
Level 1 | U.S. Agency Securities
Assets:
Total short-term investments	8,669
Level 1 | U.S. Government Securities
Assets:
Total short-term investments	14,671	7,494
Level 1 | Cash Equivalents
Assets:
Total Cash and cash equivalents	4,306	3,462
Level 1 | Cash Equivalents | Money Market Funds
Assets:
Total Cash and cash equivalents	4,306	3,462
Level 2
Assets:
Total short-term investments	21,355	20,497
Level 2 | Corporate Debt Securities
Assets:
Total short-term investments	11,430	7,845
Level 2 | U.S. Agency Securities
Assets:
Total short-term investments		7,666
Level 2 | Asset-backed Securities
Assets:
Total short-term investments	1,803
Level 2 | Commercial Paper
Assets:
Total short-term investments	8,122	4,986
Level 2 | Cash Equivalents
Assets:
Total Cash and cash equivalents	1,000	3,499
Level 2 | Cash Equivalents | Commercial Paper
Assets:
Total Cash and cash equivalents	$ 1,000	3,499
Level 3
Liabilities:
Total liabilities		288
Level 3 | Acquisition-Related Contingent Consideration
Liabilities:
Total liabilities		$ 288

Fair Value Measurement - Sche33

Fair Value Measurement - Schedule of Changes in Level 3 Fair Value Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	$ 288
Payout of consideration		$ 81
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 - Summar

Short-term Investments - Summary of Short-term Investment (Details) - Short-term Investments [Member] - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	$ 44,665	$ 27,974
Short-term Investments, Unrealized Losses	(3)	(6)
Short-term Investments, Unrealized Gains	33	23
Short-term Investments, Fair Value	44,695	27,991
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	11,433	7,851
Short-term Investments, Unrealized Losses	(3)	(6)
Short-term Investments, Fair Value	11,430	7,845
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	8,122	4,985
Short-term Investments, Unrealized Gains		1
Short-term Investments, Fair Value	8,122	4,986
U.S. Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	8,659	7,661
Short-term Investments, Unrealized Gains	10	5
Short-term Investments, Fair Value	8,669	7,666
US Government Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	14,648	7,477
Short-term Investments, Unrealized Gains	23	17
Short-term Investments, Fair Value	14,671	$ 7,494
Asset-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	1,803
Short-term Investments, Fair Value	$ 1,803

Short-term Investments - Additi

Short-term Investments - Additional Information (Details)	3 Months Ended
	Apr. 30, 2015USD ($)
Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, gross realized gain (losses)	$ 0

Short-term Investments - Schedu

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	Apr. 30, 2016	Jan. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
One year or less, amortized cost	$ 34,892	$ 19,143
Over one year and less than two years, amortized cost	9,773	8,831
Short-term Investments, Amortized Cost	44,665	27,974
One year or less, fair value	34,904	19,145
Over one year and less than two years, fair value	9,791	8,846
Short-term Investments, Fair Value	$ 44,695	$ 27,991

Short-term Investments - Sche37

Short-term Investments - Schedule of Investments in Unrealized Loss Position (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 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	$ 44,695	$ 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	11,430	7,845
Investments, Unrealized Losses	$ (3)	$ (6)

Balance Sheet Components - Comp

Balance Sheet Components - Components of Inventories (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Inventory Disclosure [Abstract]
Finished goods	$ 2,987	$ 4,633
Raw material	922	378
Total inventory	$ 3,909	$ 5,011

Balance Sheet Components - Co39

Balance Sheet Components - Components of Deferred Revenue (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 14,464	$ 15,072
Less: current portion of deferred revenue	14,351	15,036
Deferred revenue, noncurrent portion included in other liabilities	113	36
Subscription and Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	12,052	11,954
Product and Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 2,412	$ 3,118

Balance Sheet Components - Co40

Balance Sheet Components - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Payables And Accruals [Abstract]
Accrued regulatory fees and taxes	$ 5,322	$ 5,216
Accrued payroll and related expenses	2,170	3,559
Acquisition-related contingent consideration-current portion		288
Other accrued expenses	4,487	3,947
Total accrued expenses	$ 11,979	$ 13,010

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)	1 Months Ended			3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jan. 31, 2015	Dec. 31, 2012	Apr. 30, 2016	Apr. 30, 2015	Jul. 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				$ 18,000	$ 300,000
Amortization of debt issuance costs				$ 0	$ 44,000
Outstanding debt on equipment acquired under capital lease							$ 600,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, maturity period			2016-07	2016-07
Repayment of outstanding debt	$ 5,000,000
Revolving credit line		$ 12,000,000
Revolving credit line				$ 12,000,000
Interest rate				2.75%
Interest rate				3.50%
Term Debt | Secured Debt Agreement
Debt Instrument [Line Items]
Debt instrument, maturity period						2015-09
Repayment of outstanding debt						$ 5,300,000
New Line Of Credit
Debt Instrument [Line Items]
Revolving credit line		$ 10,000,000
Credit facility, maturity date		Jan. 5, 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 W42

Convertible Preferred Stock Warrant Liability - Summary of Warrants to Purchase Convertible Preferred Stock Outstanding (Details) $ in Thousands	Apr. 30, 2015USD ($)shares
Warrants Outstanding
Convertible Preferred Stock Warrant Liability [Line Items]
Warrants to purchase convertible preferred stock outstanding | shares	192,009
Fair Value Of Warrants Liabilities
Convertible Preferred Stock Warrant Liability [Line Items]
Convertible preferred stock outstanding | $	$ 1,933
December 2010 warrant | Warrants Outstanding
Convertible Preferred Stock Warrant Liability [Line Items]
Warrants to purchase convertible preferred stock outstanding | shares	70,287
December 2010 warrant | Fair Value Of Warrants Liabilities
Convertible Preferred Stock Warrant Liability [Line Items]
Convertible preferred stock outstanding | $	$ 726
May and June 2009 warrants | Warrants Outstanding
Convertible Preferred Stock Warrant Liability [Line Items]
Warrants to purchase convertible preferred stock outstanding | shares	55,696
May and June 2009 warrants | Fair Value Of Warrants Liabilities
Convertible Preferred Stock Warrant Liability [Line Items]
Convertible preferred stock outstanding | $	$ 596
April 2012, December 2012 and October 2014 warrants | Warrants Outstanding
Convertible Preferred Stock Warrant Liability [Line Items]
Warrants to purchase convertible preferred stock outstanding | shares	66,026
April 2012, December 2012 and October 2014 warrants | Fair Value Of Warrants Liabilities
Convertible Preferred Stock Warrant Liability [Line Items]
Convertible preferred stock outstanding | $	$ 611

Convertible Preferred Stock W43

Convertible Preferred Stock Warrant Liability - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				3 Months Ended
	Jul. 31, 2015	Oct. 31, 2014	Dec. 31, 2012	Apr. 30, 2012	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2015	Dec. 31, 2010	Jun. 30, 2009	May. 31, 2009
Class Of Stock [Line Items]
Payment for warrant holders					$ 0.6
Warrant to purchase convertible preferred stock									55,696	55,696
Expected volatility							70.00%
Expected term (in years)							1 year 1 month 21 days
Risk-free interest rate							0.30%
Dividend yield							0.00%
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					$ (0.3)
May and June 2009 warrants
Class Of Stock [Line Items]
Remeasurement loss from change in fair value of warrants							$ (0.2)
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							$ (0.2)
Aggregate liability	$ 0.7

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2015	Apr. 30, 2016	Apr. 30, 2015
Operating Leased Assets [Line Items]
Operating lease expiration date		2018-02
Operating leases outstanding		$ 2,800,000
Rent expense		300,000	$ 300,000
Non-cancelable purchase commitments		2,600,000
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

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2016$ / sharesshares	Apr. 30, 2016USD ($)Peroid$ / sharesshares	Apr. 30, 2015USD ($)	Jan. 31, 2016$ / sharesshares	Jul. 31, 2015$ / sharesshares	Jul. 06, 2015$ / sharesshares
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	10,000,000	10,000,000		10,000,000		10,000,000
Preferred stock, par value | $ / shares	$ 0.0001	$ 0.0001		$ 0.0001		$ 0.0001
Common stock, shares outstanding	17,190,777	17,190,777		16,916,250
Common stock, shares issued	17,190,777	17,190,777		16,916,250
Preferred stock, shares issued	0	0		0
Preferred stock, shares outstanding	0	0		0
Stock-based compensation | $		$ 2,474	$ 551
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
Employee Stock Option
Stockholders Equity Note Disclosure [Line Items]
Stock-based compensation | $		$ 684	551
Employee stock option expiration period		10 years
Aggregate intrinsic value of options exercised | $		$ 400	$ 100
Employee Stock Option | 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 | $		$ 1,508
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	798,897	798,897
Initial Public Offering
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares issued	5,000,000	5,000,000			5,000,000
Purchase price of shares under ESPP | $ / shares					$ 13
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
Percentage of eligible compensation subject to plan limitation					15.00%
Employee stock purchase plan offering period		24 months
Number of purchase periods | Peroid		4
Purchase periods		6 months
Purchase price of common stock as percentage of fair market value		85.00%
Number of shares issued under ESPP		116,629
Purchase price of shares under ESPP | $ / shares	$ 5.01	$ 5.01
Incremental compensation charge to be recognized over the remaining life | $		$ 300
Stock-based compensation | $		$ 282

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Stock Option Activity Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 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	(63,019)
Number of Shares Underlying Outstanding Options, Options canceled	(3,098)
Number of Shares Underlying Outstanding Options, Ending balance	2,021,467	2,087,584
Number of Shares Underlying Outstanding Options, Vested and exercisable	801,739
Number of Shares Underlying Outstanding Options, Vested and expected to vest	1,954,948
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning balance	$ 5.59
Weighted Average Exercise Price, Options exercised	0.58
Weighted Average Exercise Price, Options canceled	17.44
Weighted Average Exercise Price, Ending balance	5.73	$ 5.59
Weighted Average Exercise Price, Vested and exercisable	2.93
Weighted Average Exercise Price, Vested and expected to vest	$ 5.66
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term	7 years 8 months 12 days	7 years 10 months 24 days
Weighted Average Remaining Contractual Term, Vested and exercisable	6 years 2 months 12 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	7 years 8 months 12 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Options Outstanding	$ 4,888	$ 4,843
Aggregate Intrinsic Value, Vested and exercisable	3,677
Aggregate Intrinsic Value, Vested and expected to vest	$ 4,823

Stockholders' Equity - Summar47

Stockholders' Equity - Summary of RSU activity (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2016	Jan. 31, 2016
Number of Shares
Number of Shares, RSUs Beginning Balance	1,056,905
Number of Shares, RSUs granted	1,316,550
Number of Shares, RSUs canceled	(2,100)
Number of Shares, RSUs Ending Balance	2,371,355	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	7.02
Weighted-Average Grant-Date Fair Value Per Share, RSUs canceled	5.57
Weighted-Average Grant-Date Fair Value Per Share, Ending Balance	$ 7.90	$ 9.60
Weighted-Average Remaining Contractual Life
Weighted-Average Remaining Contractual Life	1 year 7 months 28 days	1 year 5 months 5 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 16,742	$ 7,176

Stock-Based Compensation - Tota

Stock-Based Compensation - Total Stock-Based Compensation Recognized for Stock-Based Awards in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,474	$ 551
Total cost of revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	235	58
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	326	56
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	944	217
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 969	$ 220

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation Expense by Award Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 2,474	$ 551
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	684	$ 551
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	1,508
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 282

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non employee stock options outstanding	62,750		67,884
Common stock, shares, Issued	68,504
Accrued expenses and other long-term liabilities	$ 0.1	$ 0.2
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to non-vested stock option grants	$ 5.2
Stock-based compensation expenses recognized on straight line basis offering period	2 years 3 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	$ 14.5
Stock-based compensation expenses recognized on straight line basis offering period	3 years 2 months 12 days
Non employee stock options outstanding	2,371,355	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	85,250		0
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to non-vested stock option grants	$ 1.6
Stock-based compensation expenses recognized on straight line basis offering period	1 year 1 month 6 days
Outstanding, ESPP			0

Stock-Based Compensation - Assu

Stock-Based Compensation - Assumptions Used to Estimate Fair Value of Employee Stock Options Grants Using Black-Scholes Option Pricing Model (Details)	3 Months Ended
	Apr. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	1 year 1 month 21 days
Dividend yield	0.00%
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	61.00%
Risk-free interest rate, minimum	1.60%
Expected volatility, maximum	62.00%
Risk-free interest rate, maximum	1.80%
Employee Stock Option | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	5 years 10 months 24 days
Employee Stock Option | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 years 1 month 6 days

Stock-Based Compensation - As52

Stock-Based Compensation - Assumptions Used to Estimate Fair Value of Employee Stock Purchase Plan Using Black-Scholes Option Pricing Model (Details)	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		1 year 1 month 21 days
Dividend yield		0.00%
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	44.00%
Risk-free interest rate, minimum	0.50%
Expected volatility, maximum	50.00%
Risk-free interest rate, maximum	1.00%
ESPP | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months
ESPP | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	2 years

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Income Tax Disclosure [Abstract]
Provision or benefit for income taxes	$ 0	$ 0
Unrecognized tax benefits	1,300,000
Interest expense or penalties related to unrecognized tax benefits	$ 0

Basic and Diluted Net Loss Pe54

Basic and Diluted Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Numerator
Net loss	$ (3,956)	$ (3,935)
Denominator
Weighted-average common shares for basic and diluted net loss per share	17,059,986	2,591,241
Basic and diluted net loss per share	$ (0.23)	$ (1.52)

Basic and Diluted Net Loss Pe55

Basic and Diluted Net Loss Per Share - Potential Shares of Common Stock Excluded from Diluted Weighted-Average Common Shares Outstanding (Details) - shares	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	4,898,691	11,254,919
Employee stock purchase plan
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	304,400
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	2,021,467	1,956,293
Restricted stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share	2,371,355
Convertible preferred stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share		8,595,217
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	103,538	423,572
Warrants to purchase convertible preferred stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares excluded from diluted net loss per share		192,009
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	87,828

Defined Contribution Plans - Ad

Defined Contribution Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Compensation And Retirement Disclosure [Abstract]
Compensation costs	$ 0.1	$ 0.1