Violin Memory (VMEMQ) 10-Q 9 Sep 15 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jul. 31, 2015	Sep. 03, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2015
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	VMEM
Entity Registrant Name	Violin Memory Inc
Entity Central Index Key	1,407,190
Current Fiscal Year End Date	--01-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		97,392,563

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 43,451	$ 93,432
Restricted cash	10,000	2,300
Short-term investments	66,707	60,483
Accounts receivable, net (including amounts due from a related party of $360 and $232 as of July 31, 2015 and January 31, 2015, respectively)	5,742	15,080
Inventory	13,002	10,322
Other current assets	3,776	5,949
Total current assets	142,678	187,566
Property and equipment, net	9,036	9,863
Intangibles and other assets	9,529	10,806
Total assets	161,243	208,235
Current liabilities:
Short-term borrowings	13,723	10,000
Accounts payable (including amounts due to a related party of $5 and $2,432 as of July 31, 2015 and January 31, 2015, respectively)	5,859	11,065
Accrued liabilities	14,837	18,024
Deferred revenue	15,350	15,635
Total current liabilities	49,769	54,724
Convertible senior notes	120,000	120,000
Deferred revenue	7,571	10,398
Long-term liabilities	979	1,707
Total liabilities	$ 178,319	$ 186,829
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value, 10,000 shares authorized as of July 31, 2015; no shares issued and outstanding as of July 31, 2015 and January 31, 2015
Common stock, $0.0001 par value, 1,000,000 shares authorized as of July 31, 2015; 96,999 and 93,872 shares issued and outstanding as of July 31, 2015 and January 31, 2015, respectively	$ 10	$ 9
Additional paid-in capital	494,847	482,674
Accumulated other comprehensive income	476	248
Accumulated deficit	(512,409)	(461,525)
Total stockholders' equity (deficit)	(17,076)	21,406
Total liabilities and stockholders' equity	$ 161,243	$ 208,235

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, amounts due from a related party	$ 360	$ 232
Accounts payable, amounts due to a related party	$ 5	$ 2,432
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	96,999,000	93,872,000
Common stock, shares outstanding	96,999,000	93,872,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Revenue:
Product revenue (including related party sales of $430 and $364 for the three months ended July 31, 2015 and 2014, respectively; and $1,257 and $855 for the six months ended July 31, 2015 and 2014, respectively)		$ 9,847	$ 14,188	$ 16,670	$ 26,961
Service revenue (including related party sales of $64 and $33 for the three months ended July 31, 2015 and 2014, respectively; and $100 and $1,075 for the six months ended July 31, 2015 and 2014, respectively)		5,456	4,405	10,734	9,765
Total revenue		15,303	18,593	27,404	36,726
Cost of revenue:
Cost of product revenue (including related party purchases of $311 and $343 for the three months ended July 31, 2015 and 2014, respectively; and $572 and $5,911 for the six months ended July 31, 2015 and 2014, respectively)	[1]	5,872	6,934	10,102	13,600
Cost of service revenue	[1]	2,831	1,971	5,552	3,869
Total cost of revenue		8,703	8,905	15,654	17,469
Gross profit		6,600	9,688	11,750	19,257
Operating expenses:
Sales and marketing	[1]	13,655	15,107	27,095	31,340
Research and development	[1]	10,580	12,994	22,106	28,830
General and administrative	[1]	4,708	5,154	9,859	10,986
Gain on sale of PCIe product line			(17,448)		(17,448)
Restructuring charges			1,306		3,062
Litigation settlement			652		652
Total operating expenses		28,943	17,765	59,060	57,422
Loss from operations		(22,343)	(8,077)	(47,310)	(38,165)
Other expense, net		(303)	(181)	(47)	(62)
Interest and other financing expense		(1,694)	(124)	(3,444)	(292)
Loss before income taxes		(24,340)	(8,382)	(50,801)	(38,519)
Income taxes		42	30	83	36
Net loss		$ (24,382)	$ (8,412)	$ (50,884)	$ (38,555)
Net loss per share of common stock, basic and diluted		$ (0.25)	$ (0.09)	$ (0.53)	$ (0.43)
Shares used in computing net loss per share of common stock, basic and diluted		96,588	91,410	96,042	88,839
[1]	Includes stock-based compensation expense as follows: Cost of product revenue $ 270 $ 279 $ 521 $ 458 Cost of service revenue 334 93 669 180 Sales and marketing 1,475 1,191 2,280 2,628 Research and development 1,977 1,834 3,955 6,100 General and administrative 1,902 1,419 3,794 3,090

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Cost of product revenue, related party purchases	$ 311	$ 343	$ 572	$ 5,911
Stock-based compensation expense			11,219	12,456
Product Revenue [Member]
Revenue from related party sales	430	364	1,257	855
Services Revenue [Member]
Revenue from related party sales	64	33	100	1,075
Cost of Product Revenue [Member]
Stock-based compensation expense	270	279	521	458
Cost of Service Revenue [Member]
Stock-based compensation expense	334	93	669	180
Sales and Marketing [Member]
Stock-based compensation expense	1,475	1,191	2,280	2,628
Research and Development [Member]
Stock-based compensation expense	1,977	1,834	3,955	6,100
General and Administrative [Member]
Stock-based compensation expense	$ 1,902	$ 1,419	$ 3,794	$ 3,090

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (24,382)	$ (8,412)	$ (50,884)	$ (38,555)
Foreign currency translation adjustments	250	(84)	244	(195)
Unrealized holding gain (loss) on available-for-sale investments, net of tax	8		(16)
Comprehensive loss	$ (24,124)	$ (8,496)	$ (50,656)	$ (38,750)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Cash flows from operating activities:
Net loss	$ (50,884)	$ (38,555)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,697	5,861
Gain on sale of PCIe product line		(17,448)
Provision for excess and obsolete inventory		606
Accretion of interest cost	878	(194)
Stock-based compensation	11,219	12,456
Changes in operating assets and liabilities:
Accounts receivable	9,338	8,995
Inventory	(2,496)	2,972
Other assets	2,058	(1,682)
Accounts payable	(5,597)	(3,589)
Accrued liabilities	(3,915)	(16,008)
Deferred revenue	(3,112)	(787)
Net cash used in operating activities	(37,814)	(47,373)
Cash flows from investing activities:
Purchase of property and equipment	(3,149)	(3,572)
Proceeds from sale of PCIe product line		23,000
Increase in restricted cash	(7,700)	(2,300)
Purchase of short-term investments	(41,139)	(11,214)
Maturity of short-term investments	34,915	47,195
Net cash provided by (used in) investing activities	(17,073)	53,109
Cash flows from financing activities:
Proceeds from debt and lines of credit	17,723	17,326
Repayment of debt and lines of credit	(14,000)	(7,500)
Proceeds from issuance of common stock	955	2,416
Taxes paid related to net share settlement of equity awards		(3,212)
Net cash provided by financing activities	4,678	9,030
Effect of exchange rates on cash and cash equivalents	228	(195)
Net increase (decrease) in cash and cash equivalents	(49,981)	14,571
Cash and cash equivalents at beginning of year	93,432	40,273
Cash and cash equivalents at end of period	43,451	54,844
Supplemental disclosure of other cash flow information:
Taxes paid	15	12
Interest paid	2,668	63
Supplemental disclosure of non-cash investing and financing activities:
Transfer of inventory to property and equipment	184	2,149
Payables related to purchases of fixed assets	$ 391
Vesting of early stock option exercises		$ 59

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	6 Months Ended
	Jul. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	1. Organization and Summary of Significant Accounting Policies Description of Business Violin Memory, Inc. (the “Company”) was incorporated in the State of Delaware on March 9, 2005 under the name Violin Technologies, Inc. The Company re-incorporated as Violin Memory, Inc. in the State of Delaware on April 11, 2007. The Company is a developer and supplier of high-performance, persistent memory-based storage systems that are designed to bring storage performance in line with high-speed applications, servers and networks. These All Flash Arrays are specifically designed at each level of the system architecture, starting with memory and optimized through the array, to leverage the inherent capabilities of flash memory. The Company recently introduced the Flash Storage Platform, the industry’s first vertically integrated design of software, firmware and hardware that delivers the highest performance, resiliency and availability at a lower cost than legacy enterprise-class primary storage. The Flash Storage Platform runs the Company’s Concerto OS 7, a single operating system with integrated continuous data protection, in-line block de-duplication and compression, stretch cluster and LUN mirroring as well as its suite of other Enterprise Data Services. With Violin’s Flash Storage Platform, all active data (Tiers 0, 1, and 2) can be consolidated onto a single tier, simplifying storage administration. Additionally, with Violin’s release of Symphony Management Suite Version 3.0, the entire software functionality can all be controlled in 1, 2 or 3 clicks, with management of the entire storage estate, through a single pane of glass. The Company sells its products through its global direct sales force, systems vendors, resellers and other channel partners. The Company operates in a single business segment. Basis of Presentation and Consolidation The accompanying condensed consolidated balance sheets and the condensed consolidated statements of operations, comprehensive loss and cash flows are unaudited. These unaudited interim 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 (“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. However, in the opinion of management, the financial statements include all the normal and recurring adjustments that are necessary to fairly state the results of the interim periods presented. As such, 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 fiscal year ended January 31, 2015, filed with the SEC on April 8, 2015. The results of operations for the three and six months ended July 31, 2015 are not necessarily indicative of the results to be expected for any subsequent interim period, the year ending January 31, 2016 or any other future period. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Foreign Currency Transactions and Remeasurement The local currency is the functional currency for each of the Company’s subsidiaries. Assets and liabilities are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at average exchange rates for the respective period. Gains and losses from foreign currency transactions are included in other income, net. Foreign currency translation adjustments are included in other comprehensive loss. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going basis, the Company evaluates its significant estimates, including those related to estimated selling prices for elements sold in multiple-element revenue arrangements, product warranty, determination of the fair value of stock options, carrying values of inventories, liabilities for unrecognized tax benefits and deferred income tax asset valuation allowances. The Company also uses estimates in determining the useful lives of property and equipment and intangible assets as well as in its provision for doubtful accounts. Actual results could differ from those estimates. Restricted Cash The Company maintains a $20.0 million line of credit with Silicon Valley Bank (“SVB”) from which the Company drew $10.0 million during the quarter ended July 31, 2015. The borrowing is collateralized by $10.0 million of cash held in an account with the same bank. The Company has recorded such collateral as restricted cash on the condensed consolidated balance sheet as of July 31, 2015. In connection with the sale of its PCIe product line in the second quarter of fiscal 2015, the Company was obligated to maintain a balance of $2.3 million with an escrow agent for one year. The agreement expired on July 24, 2015 after which the $2.3 million was received by the Company. Summary of Significant Accounting Policies The Company’s significant accounting policies have been described in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 filed with the SEC on April 8, 2015. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K that have had a material impact on the Company’s condensed consolidated financial statements and related notes. Recent Accounting Pronouncements There have been no developments to recently issued accounting standards, including the expected dates of adoption and estimated effects on the Company’s consolidated financial statements, from those disclosed in the Company’s 2015 Annual Report on Form 10-K, In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03 – Simplifying the Presentation of Debt Issuance Costs In February 2015, the FASB issued ASU 2015-02 – Amendments to the Consolidation Analysis Consolidation In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers

Cash Equivalents and Short-Term

Cash Equivalents and Short-Term Investments	6 Months Ended
	Jul. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash Equivalents and Short-Term Investments	2. Cash Equivalents and Short-Term Investments The following is a summary of cash equivalents and short-term investments by type of instrument (in thousands): July 31, 2015 Amortized Unrealized Unrealized Estimated Corporate debt securities $ 47,890 $ 13 $ (25 ) $ 47,878 Commercial paper 25,943 — — 25,943 Money market funds 11,598 — — 11,598 U.S. government and agency obligations 13,734 2 (3 ) 13,733 Municipal obligations 3 — (3 ) — $ 99,168 $ 15 $ (31 ) $ 99,152 January 31, 2015 Amortized Unrealized Unrealized Estimated Corporate debt securities $ 44,705 $ 14 $ (8 ) $ 44,711 Commercial paper 2,997 — — 2,997 U.S. government and agency obligations 7,807 2 (1 ) 7,808 Municipal obligations 4,964 3 — 4,967 $ 60,473 $ 19 $ (9 ) $ 60,483 All marketable securities are deemed by management to be available-for-sale and are reported at fair value. Net unrealized gains or losses that are not determined to be other-than-temporary are reported within stockholders’ equity on the Company’s condensed consolidated balance sheets as a component of accumulated comprehensive income. Realized gains or losses are recorded based on the specific identification method. The amortized cost and fair value of investments held as of July 31, 2015 and January 31, 2015, by contractual years-to-maturity, are as follows (in thousands): July 31, 2015 January 31, 2015 Amortized Fair Amortized Fair Due within one year $ 96,481 $ 96,464 $ 60,473 $ 60,483 Due within one to two years 2,687 2,688 — — $ 99,168 $ 99,152 $ 60,473 $ 60,483

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jul. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	3. Fair Value Measurements Assets Measured and Recorded at Fair Value on a Recurring Basis The Company measures 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 Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 Inputs are unobservable inputs based on the Company’s assumptions. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The following tables present the fair value of our financial assets and liabilities using the above input categories (in thousands): July 31, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Commercial paper $ — $ 20,847 $ — $ 20,847 Money market funds 11,598 — — 11,598 Total cash equivalents 11,598 20,847 — 32,445 Short-term investments: Corporate debt securities — 47,878 — 47,878 U.S. government and agency obligations — 13,733 — 13,733 Commercial paper — 5,096 — 5,096 Total short-term investments — 66,707 — 66,707 $ 11,598 $ 87,554 $ — $ 99,152 January 31, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Commercial paper $ — $ 34,395 $ — $ 34,395 Money market funds 24,534 — — 24,534 Corporate debt securities — 6,116 — 6,116 Total cash equivalents 24,534 40,511 — 65,045 Short-term investments: Corporate debt securities — 44,711 — 44,711 U.S. government and agency obligations — 7,808 — 7,808 Municipal obligations — 4,967 — 4,967 Commercial paper — 2,997 — 2,997 Total short-term investments — 60,483 — 60,483 $ 24,534 $ 100,994 $ — $ 125,528 The Company measures its cash equivalents and marketable securities at fair value. Money market funds are valued primarily using quoted market prices utilizing market observable inputs. The Company’s investments in commercial paper, treasury bills, corporate debt securities and municipal obligations are classified within Level 2 as the market inputs to value these instruments consist of market yields, reported trades and broker/dealer quotes. There were no transfers between Level 1 and 2 during the six months ended July 31, 2015 and the year ended January 31, 2015. Fair Value of Other Financial Instruments Based on quoted market prices as of July 31, 2015 and January 31, 2015, the fair value of the Convertible Senior Notes (Note 13) was approximately $99.3 million and $111.9 million, respectively, determined using Level 2 inputs as they are not actively traded in markets. The carrying amounts of the Company’s accounts receivable, accounts payable, accrued liabilities and other liabilities approximate their fair value due to their short-term maturities.

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jul. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Components	4. Balance Sheet Components Accounts Receivable, Net The following table shows the components of accounts receivable, net (in thousands): July 31, January 31, Accounts receivable $ 6,041 $ 15,680 Allowance for doubtful accounts (36 ) (39 ) Allowance for sales returns (263 ) (561 ) $ 5,742 $ 15,080 Inventory The following table shows the components of inventory (in thousands): July 31, January 31, Raw materials $ 4,552 $ 3,677 Finished goods 8,450 6,645 $ 13,002 $ 10,322 Property and equipment, net The following table shows the components of property and equipment, net (in thousands): July 31, January 31, Laboratory equipment $ 26,608 $ 25,589 Computer hardware and software 13,927 12,165 Leasehold improvements 707 691 Office furniture 326 326 41,568 38,771 Less: accumulated depreciation (32,532 ) (28,908 ) $ 9,036 $ 9,863 Depreciation expense (including amortization of leasehold improvements and intangibles) was $2.2 million and $2.5 million for the three months ended July 31, 2015 and 2014, respectively, and $4.7 million and $5.9 million for the six months ended July 31, 2015 and 2014, respectively. Intangibles and Other Assets The following table shows the components of intangibles and other assets (in thousands): July 31, January 31, Purchased intellectual property $ 5,577 $ 6,086 Deferred borrowing costs 3,244 4,032 Other 708 688 $ 9,529 $ 10,806 Accrued liabilities The following table shows the components of accrued liabilities (in thousands): July 31, January 31, Compensation and benefits $ 5,659 $ 9,036 Purchase commitments 1,052 2,328 Accrued interest 1,700 1,700 Warranty 946 1,262 Restructuring charges 753 313 Professional fees 922 101 Other 3,805 3,284 $ 14,837 $ 18,024 Accrued Warranty The following table is a reconciliation of the changes in the Company’s product warranty liability (in thousands): Six Months Ended July 31, 2015 2014 Balance, beginning of year $ 1,262 $ 1,223 Additions 325 712 Settlements (641 ) (690 ) Balance, end of period $ 946 $ 1,245 Restructuring During the fourth quarter of fiscal 2014, the Company initiated a restructuring plan focused on accelerating growth and increasing operating leverage, including a reorganization of its sales, marketing and engineering functions in order to better focus on the core segments of the flash-based storage market and improve operating and financial efficiency. In connection with the Company’s restructuring activities and decision to focus on its core All Flash Array market, the Company sold its PCIe Flash Memory Card product line in July 2014 and realized proceeds of $23.0 million and a gain of $17.4 million as a result. The Company’s restructuring charges consist primarily of severance, facility costs and other related charges. Severance generally includes severance payments, payments for pro-rata share of earned incentive pay and health insurance coverage. Facility costs include rent expense and related common area maintenance charges attributable to a leased facility that will not utilized over the remaining lease term. Other related charges primarily consist of write-off of purchased software which will not be utilized and consulting charges associated with the reorganization of the Company. A summary of the restructuring activities is as follows (in thousands): Severance Excess facility Other Total Balance January 31, 2014 $ 2,371 $ 511 $ 366 $ 3,248 Restructuring provision 1,185 1,810 67 3,062 Payments and other adjustments (3,556 ) (1,057 ) (433 ) (5,046 ) Balance January 31, 2015 — 1,264 — 1,264 Payments and other adjustments — (108 ) — (108 ) Balance July 31, 2015 $ — $ 1,156 $ — 1,156 Less noncurrent portion (403 ) Current portion of restructuring accrual $ 753

Convertible Senior Notes and Li

Convertible Senior Notes and Line of Credit	6 Months Ended
	Jul. 31, 2015
Debt Disclosure [Abstract]
Convertible Senior Notes and Line of Credit	5. Convertible Senior Notes and Line of Credit Convertible Senior Notes On September 19, 2014, the Company issued $120.0 million aggregate principal amount of Convertible Senior Notes (the “Notes”), which included $15.0 million issued pursuant to an over-allotment option granted to the initial purchasers. The aggregate principal amount of the Notes is due on October 1, 2019, unless earlier repurchased, redeemed or converted. The Company received net proceeds of $115.4 million after deducting offering costs. Interest on the outstanding Notes accrues at a rate of 4.25% per annum and is payable semi-annually on April 1 and October 1 of each year beginning on April 1, 2015. Interest began to accrue on September 24, 2014. The Notes are unsecured senior obligations of Violin. The Notes were offered and sold only to qualified institutional investors, as defined in Rule 144 under the Securities Act of 1933 as amended (“Securities Act”), and the Notes and the shares of the Company’s common stock issuable upon conversion of the Notes have not been registered under the Securities Act. The Company used the net proceeds to repay all amounts outstanding and owed under its credit agreement with Silicon Valley Bank (SVB) discussed below, and intends to use the remaining net proceeds for general corporate purposes, including working capital. In addition, the Company believes that the issuance of the Notes provides greater financial flexibility to the Company and should provide its customers and/or potential customers with greater confidence in the Company’s liquidity. The Company may redeem the Notes, at its option, in whole or in part on or after October 1, 2017, if the last reported sale price per share of its common stock equals or exceeds 130% of the applicable conversion price for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on the trading day immediately prior to the date on which the Company delivers notice of the redemption. Holders of the Notes may convert all or any portion of their Notes, in multiples of $1,000 principal amount, at their option at any time prior to the close of business on the business day immediately preceding the maturity date. The Notes are convertible at an initial conversion rate of 177.8489 shares of the Company’s common stock per $1,000 principal amount of Notes. This is equivalent to an initial conversion price of approximately $5.62 per share of the Company’s common stock, subject to adjustment upon the occurrence of certain dilutive events, or, if the Company obtains the required consent from its stockholders, into shares of the Company’s common stock, cash or a combination of cash and shares of its common stock, at the Company’s election. The conversion rate will be increased in the case of corporate events that constitute a “Make-Whole Fundamental Change” (as defined in the indenture governing the Notes). As of July 31, 2015, the Notes are not convertible. The holders of the Notes will have the ability to require the Company to repurchase the Notes in whole or in part upon the occurrence of an event that constitutes a “Fundamental Change” (as defined in the indenture governing the Notes including such events as a “change in control” or “termination of trading”). In such case, the repurchase price would be 100% of the principal amount of the Notes plus accrued and unpaid interest, if any. Certain events are also considered “Events of Default,” which may result in the acceleration of the maturity of the Notes, as described in the indenture governing the Notes, including, among other events, the Company’s failure to timely file with the SEC the reports required pursuant to Section 13 or 15(d) of the Securities Exchange of 1934, as amended. There were no “Fundamental Changes” or “Events of Default” that occurred during the quarter ended July 31, 2015. The Company was in compliance with its covenants under the Notes as of July 31, 2015. During the time that the Notes are outstanding, the Company may not at any time incur any indebtedness other than permitted debt, which is defined as: (a) revolving debt secured by the Company’s accounts receivable and the proceeds therefrom in a principal amount not to exceed $50.0 million; (b) unsecured indebtedness (including the Notes) in a principal amount not to exceed (when combined with any indebtedness incurred under clause (c) below) $150.0 million; (c) secured indebtedness secured by the Company’s intellectual property in a principal amount not to exceed (when combined with any indebtedness incurred under clause (b) above) $150.0 million; and (d) unsecured subordinated indebtedness in a principal amount not to exceed $50 million. Furthermore, the Company may incur indebtedness if (a) the Company is not in default and such additional debt would not put it into default and (ii) the consolidated leverage ratio, as defined, after taking the additional debt into account does not exceed 5:1. The conversion option of the Notes cannot be settled in cash prior to obtaining the necessary approval of the Company’s stockholders. In accordance with guidance in ASC 470-20, Debt with Conversion and Other Options Embedded Derivatives The deferred debt issuance costs are recorded in other assets and are being amortized to interest and other financing expense using the effective interest method over the Notes’ five-year term. Silicon Valley Bank Credit Agreement In October 2014, the Company entered into a $20.0 million secured revolving line of credit with SVB. The Company’s obligations under the agreement are secured by a first priority security interest in the Company’s accounts receivable and proceeds therefrom. Borrowings under this facility will bear interest at a rate per annum of either (a) the sum of (i) the Eurodollar rate plus (ii) 5.00%, or (b) the sum of (i) ABR plus (ii) 2.00%. The Company had $13.7 million and $10.0 million outstanding on this facility at July 31, 2015 and January 31, 2015, respectively. The line of credit expires on October 24, 2016, subject to acceleration upon certain specified events of defaults. The debt issuance costs associated with the line of credit are reflected in other current assets and are being amortized to interest and other financing expense using the straight line method over the facility’s two-year term.

Equity Award and Employee Compe

Equity Award and Employee Compensation Plans	6 Months Ended
	Jul. 31, 2015
Equity [Abstract]
Equity Award and Employee Compensation Plans	6. Equity Award and Employee Compensation Plans The 2012 Stock Plan In November 2012, the Company’s stockholders approved the adoption of the 2012 Stock Incentive Plan (the “2012 Plan”) as the successor plan to the 2005 Plan, which became effective at the completion of the Company’s initial public offering (“IPO”). The 2012 Plan is administered by the Compensation Committee of the Board of Directors (the “Compensation Committee”), and the Compensation Committee may terminate or amend the plan at any time. Unexercised options or restricted stock units under the 2005 Plan that cancel due to a grantee’s termination may be reissued under the 2012 Plan. Under the 2012 Plan, stock options, restricted shares, restricted stock units and stock appreciation rights may be granted to employees, outside directors and consultants at not less than 100% of the fair value on the date of grant and generally vest ratably over four years. Options generally expire seven years from the date of grant. As of January 31, 2015, there were 11,652,856 shares authorized under the 2012 Plan. On February 1, 2015, the share reserve increased by 4,702,218 shares to an aggregate of 16,355,074 shares authorized under the plan and will be increased by any shares forfeited under the 2005 Plan. Inducement Awards During fiscal 2015, the Company issued inducement awards totaling 6,250,000 shares outside of the 2012 Plan under the employee inducement award exemption under the New York Stock Exchange Listed Company Manual Rule 303A.08, to the Company’s CEO and certain key executives. In February 2015, 1,250,000 shares were forfeited. The following table summarizes the stock option activity related to shares of common stock under the Company’s 2005, 2012 Plans as well as the Inducement Awards (in thousands, except per share data): Outstanding Options Shares Number of Weighted- Weighted-Average Aggregate Balances, January 31, 2015 6,614 12,649 3.35 7.25 34,255 Additional shares authorized 4,702 RSUs granted (5,663 ) RSUs cancelled/forfeited 1,967 Options granted (2,234 ) 2,234 3.23 Options exercised — (634 ) 0.60 Options forfeited 301 (1,551 ) 0.53 Balances, July 31, 2015 5,687 12,698 $ 3.35 Options vested and expected to vest – July 31, 2015 5,501 $ 3.71 7.38 $ — Options exercisable – July 31, 2015 5,714 $ 2.88 7.00 $ 2,487 (1) Aggregate intrinsic value is based on the common stock price at each respective date presented. (2) Shares available for grant exclude inducement award forfeited. The weighted average grant date fair value of options granted during the six months ended July 31, 2015 was $1.44 per share. The total intrinsic value of options exercised during the six months ended July 31, 2015 was $2.0 million. Restricted Stock Units The table below summarizes the RSU activity under the Company’s 2005 and 2012 Plans (in thousands, except per share data): Number Weighted- Aggregate Balance, January 31, 2015 6,849 4.71 26,299 RSUs granted 5,667 3.53 RSUs vested (2,307 ) 4.62 RSUs cancelled/forfeited (1,967 ) 4.43 Balance, July 31, 2015 8,242 $ 3.98 $ 19,451 (1) Aggregate intrinsic value is based on the common stock price at each respective date presented. The aggregate intrinsic value of RSUs that vested during the six months ended July 31, 2015 amounted to $8.3 million. During the six months ended July 31, 2014, 3.7 million of RSUs for which the service condition was satisfied vested in March 2014 upon satisfaction of the liquidity condition. Under net settlement procedures applicable to the March 2014 vesting dates, approximately 786,000 RSUs were withheld to cover the required withholding tax, which is based on the value of the RSU on the applicable settlement date. The remaining amounts were delivered to the recipients as shares of the Company’s common stock. Non-employee Stock Options and Awards For the three and six months ended July 31, 2015, the Company did not grant any options or restricted shares of common stock to non-employees. For the three and six months ended July 31, 2014, the Company granted approximately 309,000 restricted shares of common stock to non-employees. Employee Stock Purchase Plan In November 2012, the Company’s stockholders approved the adoption of the 2012 Employee Stock Purchase Plan (the “2012 Purchase Plan”). The 2012 Purchase Plan permits eligible employees to purchase common stock on favorable terms via payroll deductions of up to 15% of the employee’s salary, subject to certain share and statutory dollar limits. Two overlapping offering periods commence during each calendar year, on each June 1 and December 1 or such other periods or dates as determined by the Compensation Committee from time to time, and the offering periods last up to 24 months with a purchase date every six months. The price of each share purchased is 85% of the lower of a) the fair value per share of common stock on the last trading day before the commencement of the applicable offering period, or b) the fair value per share of common stock on the purchase date. The 2012 Purchase Plan is administered by the Compensation Committee, and the Compensation Committee may terminate or amend the plan. Upon adoption, a total of 1,000,000 shares were reserved for issuance under the 2012 Purchase Plan. On February 1, 2015, pursuant to the provisions of the plan, the share reserve was increased by 727,832 shares to an aggregate of 2,327,832 shares as of February 1, 2015. Employee 401(k) Plan The Company sponsors the Violin Memory, Inc. 401(k) Plan (“401(k) Plan”), which qualifies under Section 401(k) of the Internal Revenue Code and is designed to provide retirement benefits for its eligible employees through tax-deferred salary deductions. Employees may elect to contribute up to 90% of their eligible compensation to the 401(k) Plan. Employee contributions are limited to a maximum annual amount as set periodically by the Internal Revenue Service (“IRS”). The Company does not currently match employee contributions.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jul. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	7. Stock-Based Compensation As of July 31, 2015, total stock-based compensation cost related to unvested equity awards not yet recognized, net of estimated forfeitures, totaled $31.6 million. The Company expects, based upon equity awards outstanding as of July 31, 2015, to amortize $7.9 million during the remainder of fiscal 2016, $11.1 million in fiscal 2017, $7.2 million in fiscal 2018, $4.7 million in fiscal 2019 and $0.6 million in fiscal 2020. There was no capitalized stock-based compensation expense for any period presented. Stock based compensation associated with non-employee awards was approximately $0.2 million and $0.3 million for the three months ended July 31, 2015 and 2014, respectively, and $0.2 million and $0.5 million for the six months ended July 31, 2015 and 2014, respectively.

Income Taxes

Income Taxes	6 Months Ended
	Jul. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes The Company’s quarterly provision for income taxes is based on an estimated effective annual income tax rate. The Company’s quarterly provision for income taxes also includes the tax impact of certain unusual or infrequently occurring items, if any, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, in the interim period in which they occur. Income tax expense for the three months ended July 31, 2015 and 2014 was $42,000 and $30,000, respectively, and $83,000 and $36,000 for the six months ended July 31, 2015 and 2014, respectively. As of July 31, 2015, the income tax rate varies from the United States statutory income tax rate primarily due to valuation allowances in the United States and taxable income generated by the Company’s foreign wholly-owned subsidiaries. The Company has a full valuation allowance against its net operating loss carryforwards and research and development credits for both federal and state purposes. Utilization of the net operating loss carry forwards and credits may be subject to substantial annual limitations due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitations may result in the expiration of net operating loss carryforwards and credits before utilization. The Company reviews the likelihood that it will realize the benefit of its deferred tax assets and, therefore, the need for valuation allowances on a quarterly basis. There is no corresponding income tax benefit recognized with respect to losses incurred and no corresponding income tax expense recognized with respect to earnings generated in jurisdictions with a valuation allowance. This causes variability in the Company’s effective tax rate. The Company intends to maintain the valuation allowances until it is more likely than not that the net deferred tax assets will be realized. As of July 31, 2015, the Company had no unrecognized tax benefits that would affect the Company’s effective tax rate if recognized.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jul. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies Litigation The Company assesses its potential liability by analyzing specific litigation and regulatory matters using reasonably available information. The Company develops its views on estimated losses in consultation with inside and outside counsel, which involves a subjective analysis of potential results and outcomes, assuming various combinations of appropriate litigation and settlement strategies. Beginning on November 26, 2013, four putative class action lawsuits were filed in the United States District Court for the Northern District of California naming as defendants the Company, a number of the Company’s present or former directors and officers, and the underwriters of the Company’s September 27, 2013 initial public offering (the “IPO”). The four complaints were consolidated into a single, putative class action, and co-lead plaintiffs were appointed by the court. On March 28, 2014, the plaintiffs filed a consolidated complaint purporting to assert claims under the federal securities laws, based upon seven categories of alleged omissions, on behalf of purchasers of the Company’s common stock issued in the IPO. The complaint sought damages in an unspecified amount and other relief. On April 18, 2014, the defendants filed motions to dismiss the complaint. On October 31, 2014, the court granted in part and denied in part defendants’ motions to dismiss. The court’s order dismissed all except one category of alleged omissions, and gave plaintiffs the opportunity to amend the complaint. On November 21, 2014, the plaintiffs filed an amended consolidated complaint and, in so doing, chose not to amend their claims against the Company or the present or former directors and officers. On April 30, 2015, the court issued an order granting in part the defendants’ motions to dismiss the amended consolidated complaint. The court’s order dismissed all except two categories of claims against the Company and the present or former directors and officers of the Company and certain claims against the underwriters. On May 6, 2015, the plaintiffs filed a second amended consolidated complaint. On May 20, 2015, the Company and the present and former directors and officers filed an answer to the second amended consolidated complaint denying the material allegations of the complaint and alleging numerous affirmative defenses to the remaining claims. The case is now in the discovery phase of the litigation. A purported stockholder derivative action also is pending before the same federal district court judge to whom the putative class action has been assigned. In the derivative action, the plaintiffs allege that certain of the Company’s current and former officers and directors breached their fiduciary duties to the Company by violating the federal securities laws and exposing the Company to possible financial liability. The parties have agreed to stay the derivative action pending further developments in the putative class action. The stay may be lifted at any time. The Company intends to continue to defend itself vigorously in both securities actions. The Company believes the ultimate outcome of the current legal proceedings, individually and in the aggregate, will not have a material adverse effect on its financial position, results of operations or cash flows. However, because of the inherent uncertainties surrounding litigation, should the outcome of these actions be unfavorable, the Company’s business, financial condition, results of operations or cash flows could be materially and adversely affected. Indemnification The Company indemnifies certain of its officers and directors for certain events or occurrences, subject to certain limits, while the officer or director is or was serving at the Company’s request in such capacity. The Company’s certificate of incorporation and bylaws require that it indemnify its officers and directors against expenses, judgments, fines, settlements and other amounts actually and reasonably incurred in connection with any proceedings arising out of their services to the Company. In addition, the Company has entered into separate indemnification agreements with each of its directors and executive officers, which provide for indemnification of these individuals under certain circumstances. The maximum amount of potential future indemnification is unlimited; however, the Company has a Directors and Officers insurance policy that enables the Company to recover a portion of any future amounts paid. Historically, the Company has not been obligated to make any payments for these obligations and no liabilities have been recorded for these obligations on the condensed consolidated balance sheets as of July 31, 2015 and January 31, 2015. The Company may, in the ordinary course of business, agree to defend and indemnify some customers against legal claims that the Company’s products infringe on certain U.S. patents or copyrights. The terms of such obligations may vary. To date, the Company has not been required to make any payments resulting from such infringement indemnifications and no amounts have been accrued for such matters. Operating Lease Commitments The Company leases office space under various non-cancelable operating leases that expire at various dates through fiscal 2018. Future minimum lease payments under the Company’s operating leases as of July 31, 2015, are as follows (in thousands): Fiscal years ending January 31: Amount 2016 (remainder of) $ 1,969 2017 3,716 2018 294 $ 5,979 Purchase Commitments The Company depends upon one contract manufacturer to manufacture its products and provide test services. Due to the lengthy lead times, the Company must order from its contract manufacturer well in advance and is obligated to pay for materials when received by the contract manufacturer and services once they are completed. As of July 31, 2015, the Company had approximately $8.5 million of outstanding purchase commitments to such contract manufacturer and other vendors. Advertising Commitment In June 2012, the Company entered into an agreement with the Forty Niners SC Stadium Company LLC, which was amended in April 2014. As part of the amended agreement, the Company will receive advertising and related benefits at the stadium in Santa Clara, California. The Company recognized $0.3 million and nil in advertising expenses related to this agreement for the three months ended July 31, 2015 and 2014, respectively, and $0.6 million and nil for the six months ended July 31, 2015 and 2014, respectively. As of July 31, 2015, the Company had approximately $15.8 million of outstanding commitments under this arrangement. Other Contingencies From time to time, the Company may become involved in legal proceedings or other claims and assessments arising in the ordinary course of business. The Company is not currently a party to any litigation matters, except as discussed above, which, individually or in the aggregate, are expected to have a material adverse effect on the Company’s business, financial condition or results of operations.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jul. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	10. Related Party Transactions Toshiba As of July 31, 2015, Toshiba Corporation and its affiliates, including Toshiba America Electronic Components, Inc. (collectively Toshiba), owned 9.2 million shares of the Company’s common stock, or approximately 9% of the Company’s total common stock outstanding. In June 2011, the Company entered into a Sales Agreement with Toshiba pursuant to which the Company agreed to purchase at least 70% of its annual flash memory requirement from Toshiba. The Sales Agreement with Toshiba expired in June 2014 and automatically renews for successive one-year periods unless terminated by either party. The Company purchased $5,000 and $0.3 million of NAND flash memory from Toshiba during the three months ended July 31, 2015 and 2014, respectively, and $5.4 million and $5.9 million for the six months ended July 31, 2015 and 2014, respectively. In July 2013, the Company signed an agreement with Toshiba for the development of PCIe cards and the sale of sample cards and received a prepayment of $16.0 million. The $16.0 million prepayment consisted of $8.0 million for services to be performed for the development of the PCIe cards and $8.0 million for the sale of sample PCIe cards and related support services. The Company retains all ownership of the intellectual property developed under the agreement. The Company recognized $1.0 million of service revenue related to development services performed under the agreement for both the three and six months ended July 31, 2014. The agreement was terminated in May 2014. In addition to the development agreement, the Company recognized revenue of $0.4 million and $0.4 million related to the sale of All Flash Arrays and services to Toshiba during the three months ended July 31, 2015 and 2014, respectively, and $0.9 million and $0.9 million during the six months ended July 31, 2015 and 2014, respectively. Other In April 2015, the Company sold $0.7 million of product and services to First Solar, Inc. Mr. Antoun, a member of the Company’s Board of Directors, is the Chief Operating Officer of First Solar, Inc. The Company recognized revenue of $0.3 million and $0.5 million related to the sale of All Flash Arrays and services to First Solar during the three and six months ended July 31, 2015, respectively. The Company had no sales to First Solar in the three or six months ended July 31, 2014.

Segment Information and Custome

Segment Information and Customer Concentration	6 Months Ended
	Jul. 31, 2015
Segment Reporting [Abstract]
Segment Information and Customer Concentration	11. Segment Information and Customer Concentration Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, the Company’s chief executive officer. The Company’s chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. The Company has one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated unit level. Accordingly, the Company considers itself to be in a single reportable segment and operating unit structure. Revenue by geography is based on the billing address of the customer. The following tables set forth revenue and property and equipment, net by geographic area (in thousands): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Revenue: Americas: United States $ 9,857 $ 12,443 $ 18,031 $ 21,945 Other Americas 29 34 61 331 9,886 12,477 18,092 22,276 Europe: United Kingdom 1,602 599 2,701 1,680 Other Europe 1,680 3,070 2,187 6,563 3,282 3,669 4,888 8,243 Asia Pacific: 2,135 2,447 4,424 6,207 $ 15,303 $ 18,593 $ 27,404 $ 36,726 July 31, January 31, Property and Equipment, Net: United States $ 8,761 $ 9,653 Europe 115 204 Asia Pacific 160 6 $ 9,036 $ 9,863 Customer Concentration For the three months ended July 31, 2015, one customer represented 30% of revenue. For the six months ended July 31, 2015, one customer represented 18% of revenue. For the three months ended July 31, 2014, two customers represented 13% and 10% of revenue. No customer accounted for more than 10% of revenue in the six months ended July 31, 2014. Revenue from the Company’s five largest customers for the three months ended July 31, 2015 and 2014 was 48% and 42%, respectively, and 36% and 30% during the six months ended July 31, 2015 and 2014, respectively. As a consequence of the limited number of customers and the concentrated nature of their purchases, the Company’s revenue, gross margin and operating results may fluctuate significantly from period to period and are difficult to estimate. At July 31, 2015, three customers represented 21%, 20% and 19% of the net accounts receivable balance. At January 31, 2015, one customer represented 19% of accounts receivable. No other customers accounted for more than 10% of the accounts receivable balance at July 31, 2015 and January 31, 2015.

Net Loss Per Share

Net Loss Per Share	6 Months Ended
	Jul. 31, 2015
Earnings Per Share [Abstract]
Net Loss Per Share	12. Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less the weighted-average unvested common stock subject to repurchase or forfeiture. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including stock options and warrants, to the extent dilutive. Basic and diluted net loss per share was the same for each period presented as the inclusion of all potential common shares outstanding would have been anti-dilutive. The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share data): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Numerator: Net loss $ (24,382 ) $ (8,412 ) $ (50,884 ) (38,555 ) Denominator: Weighted-average common shares outstanding 96,588 91,432 96,042 88,879 Less: Weighted-average unvested common shares subject to repurchase — 22 — 40 Weighted-average shares used to compute net loss per share, basic and diluted 96,588 91,410 96,042 88,839 Net loss per share, basic and diluted $ (0.25 ) $ (0.09 ) $ (0.53 ) $ (0.43 ) The following potential common stock equivalents that could potentially dilute net loss per share in the future were excluded from the computation of diluted net loss per share because including them would have had an anti-dilutive effect for the periods presented (in thousands): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Convertible preferred stock (on an as converted basis) 21,.352 — 21,352 — Shares subject to outstanding common stock options and restricted stock units 20,940 20,678 20,940 20,678 Common stock warrants 164 84 164 84 Common stock subject to repurchase — 11 — 11 42,456 20,773 42,456 20,773

Organization and Summary of S20

Organization and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Violin Memory, Inc. (the “Company”) was incorporated in the State of Delaware on March 9, 2005 under the name Violin Technologies, Inc. The Company re-incorporated as Violin Memory, Inc. in the State of Delaware on April 11, 2007. The Company is a developer and supplier of high-performance, persistent memory-based storage systems that are designed to bring storage performance in line with high-speed applications, servers and networks. These All Flash Arrays are specifically designed at each level of the system architecture, starting with memory and optimized through the array, to leverage the inherent capabilities of flash memory. The Company recently introduced the Flash Storage Platform, the industry’s first vertically integrated design of software, firmware and hardware that delivers the highest performance, resiliency and availability at a lower cost than legacy enterprise-class primary storage. The Flash Storage Platform runs the Company’s Concerto OS 7, a single operating system with integrated continuous data protection, in-line block de-duplication and compression, stretch cluster and LUN mirroring as well as its suite of other Enterprise Data Services. With Violin’s Flash Storage Platform, all active data (Tiers 0, 1, and 2) can be consolidated onto a single tier, simplifying storage administration. Additionally, with Violin’s release of Symphony Management Suite Version 3.0, the entire software functionality can all be controlled in 1, 2 or 3 clicks, with management of the entire storage estate, through a single pane of glass. The Company sells its products through its global direct sales force, systems vendors, resellers and other channel partners. The Company operates in a single business segment.
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying condensed consolidated balance sheets and the condensed consolidated statements of operations, comprehensive loss and cash flows are unaudited. These unaudited interim 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 (“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. However, in the opinion of management, the financial statements include all the normal and recurring adjustments that are necessary to fairly state the results of the interim periods presented. As such, 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 fiscal year ended January 31, 2015, filed with the SEC on April 8, 2015. The results of operations for the three and six months ended July 31, 2015 are not necessarily indicative of the results to be expected for any subsequent interim period, the year ending January 31, 2016 or any other future period. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.
Foreign Currency Transactions and Remeasurement	Foreign Currency Transactions and Remeasurement The local currency is the functional currency for each of the Company’s subsidiaries. Assets and liabilities are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at average exchange rates for the respective period. Gains and losses from foreign currency transactions are included in other income, net. Foreign currency translation adjustments are included in other comprehensive loss.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going basis, the Company evaluates its significant estimates, including those related to estimated selling prices for elements sold in multiple-element revenue arrangements, product warranty, determination of the fair value of stock options, carrying values of inventories, liabilities for unrecognized tax benefits and deferred income tax asset valuation allowances. The Company also uses estimates in determining the useful lives of property and equipment and intangible assets as well as in its provision for doubtful accounts. Actual results could differ from those estimates.
Restricted Cash	Restricted Cash The Company maintains a $20.0 million line of credit with Silicon Valley Bank (“SVB”) from which the Company drew $10.0 million during the quarter ended July 31, 2015. The borrowing is collateralized by $10.0 million of cash held in an account with the same bank. The Company has recorded such collateral as restricted cash on the condensed consolidated balance sheet as of July 31, 2015. In connection with the sale of its PCIe product line in the second quarter of fiscal 2015, the Company was obligated to maintain a balance of $2.3 million with an escrow agent for one year. The agreement expired on July 24, 2015 after which the $2.3 million was received by the Company.
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The Company’s significant accounting policies have been described in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 filed with the SEC on April 8, 2015. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K that have had a material impact on the Company’s condensed consolidated financial statements and related notes.
Recent Accounting Pronouncements	Recent Accounting Pronouncements There have been no developments to recently issued accounting standards, including the expected dates of adoption and estimated effects on the Company’s consolidated financial statements, from those disclosed in the Company’s 2015 Annual Report on Form 10-K, In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03 – Simplifying the Presentation of Debt Issuance Costs In February 2015, the FASB issued ASU 2015-02 – Amendments to the Consolidation Analysis Consolidation In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers
Fair Value Measurements	The Company measures 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 Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 Inputs are unobservable inputs based on the Company’s assumptions. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Fair Value of Financial Instruments	The Company measures its cash equivalents and marketable securities at fair value. Money market funds are valued primarily using quoted market prices utilizing market observable inputs. The Company’s investments in commercial paper, treasury bills, corporate debt securities and municipal obligations are classified within Level 2 as the market inputs to value these instruments consist of market yields, reported trades and broker/dealer quotes. There were no transfers between Level 1 and 2 during the six months ended July 31, 2015 and the year ended January 31, 2015. Fair Value of Other Financial Instruments Based on quoted market prices as of July 31, 2015 and January 31, 2015, the fair value of the Convertible Senior Notes (Note 13) was approximately $99.3 million and $111.9 million, respectively, determined using Level 2 inputs as they are not actively traded in markets. The carrying amounts of the Company’s accounts receivable, accounts payable, accrued liabilities and other liabilities approximate their fair value due to their short-term maturities.
Restructuring Charges	The Company’s restructuring charges consist primarily of severance, facility costs and other related charges. Severance generally includes severance payments, payments for pro-rata share of earned incentive pay and health insurance coverage. Facility costs include rent expense and related common area maintenance charges attributable to a leased facility that will not utilized over the remaining lease term. Other related charges primarily consist of write-off of purchased software, which will not be utilized and consulting charges associated with the reorganization of the Company.
Operating segments	Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, the Company’s chief executive officer. The Company’s chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. The Company has one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated unit level. Accordingly, the Company considers itself to be in a single reportable segment and operating unit structure.

Cash Equivalents and Short-Te21

Cash Equivalents and Short-Term Investments (Tables)	6 Months Ended
	Jul. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash Equivalents and Short-Term Investments by Type of Instrument	The following is a summary of cash equivalents and short-term investments by type of instrument (in thousands): July 31, 2015 Amortized Unrealized Unrealized Estimated Corporate debt securities $ 47,890 $ 13 $ (25 ) $ 47,878 Commercial paper 25,943 — — 25,943 Money market funds 11,598 — — 11,598 U.S. government and agency obligations 13,734 2 (3 ) 13,733 Municipal obligations 3 — (3 ) — $ 99,168 $ 15 $ (31 ) $ 99,152 January 31, 2015 Amortized Unrealized Unrealized Estimated Corporate debt securities $ 44,705 $ 14 $ (8 ) $ 44,711 Commercial paper 2,997 — — 2,997 U.S. government and agency obligations 7,807 2 (1 ) 7,808 Municipal obligations 4,964 3 — 4,967 $ 60,473 $ 19 $ (9 ) $ 60,483
Amortized Cost and Fair Value of Investments by Contractual Years-to-Maturity	The amortized cost and fair value of investments held as of July 31, 2015 and January 31, 2015, by contractual years-to-maturity, are as follows (in thousands): July 31, 2015 January 31, 2015 Amortized Fair Amortized Fair Due within one year $ 96,481 $ 96,464 $ 60,473 $ 60,483 Due within one to two years 2,687 2,688 — — $ 99,168 $ 99,152 $ 60,473 $ 60,483

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jul. 31, 2015
Fair Value Disclosures [Abstract]
Summary of Fair Value of Financial Assets and Liabilities	The following tables present the fair value of our financial assets and liabilities using the above input categories (in thousands): July 31, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Commercial paper $ — $ 20,847 $ — $ 20,847 Money market funds 11,598 — — 11,598 Total cash equivalents 11,598 20,847 — 32,445 Short-term investments: Corporate debt securities — 47,878 — 47,878 U.S. government and agency obligations — 13,733 — 13,733 Commercial paper — 5,096 — 5,096 Total short-term investments — 66,707 — 66,707 $ 11,598 $ 87,554 $ — $ 99,152 January 31, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Commercial paper $ — $ 34,395 $ — $ 34,395 Money market funds 24,534 — — 24,534 Corporate debt securities — 6,116 — 6,116 Total cash equivalents 24,534 40,511 — 65,045 Short-term investments: Corporate debt securities — 44,711 — 44,711 U.S. government and agency obligations — 7,808 — 7,808 Municipal obligations — 4,967 — 4,967 Commercial paper — 2,997 — 2,997 Total short-term investments — 60,483 — 60,483 $ 24,534 $ 100,994 $ — $ 125,528

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jul. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Components of Accounts Receivable, Net	The following table shows the components of accounts receivable, net (in thousands): July 31, January 31, Accounts receivable $ 6,041 $ 15,680 Allowance for doubtful accounts (36 ) (39 ) Allowance for sales returns (263 ) (561 ) $ 5,742 $ 15,080
Schedule of Inventory Components	The following table shows the components of inventory (in thousands): July 31, January 31, Raw materials $ 4,552 $ 3,677 Finished goods 8,450 6,645 $ 13,002 $ 10,322
Schedule of Components of Property and Equipment, Net	The following table shows the components of property and equipment, net (in thousands): July 31, January 31, Laboratory equipment $ 26,608 $ 25,589 Computer hardware and software 13,927 12,165 Leasehold improvements 707 691 Office furniture 326 326 41,568 38,771 Less: accumulated depreciation (32,532 ) (28,908 ) $ 9,036 $ 9,863
Components of Intangibles and Other Assets	The following table shows the components of intangibles and other assets (in thousands): July 31, January 31, Purchased intellectual property $ 5,577 $ 6,086 Deferred borrowing costs 3,244 4,032 Other 708 688 $ 9,529 $ 10,806
Schedule of Components of Accrued Liabilities	The following table shows the components of accrued liabilities (in thousands): July 31, January 31, Compensation and benefits $ 5,659 $ 9,036 Purchase commitments 1,052 2,328 Accrued interest 1,700 1,700 Warranty 946 1,262 Restructuring charges 753 313 Professional fees 922 101 Other 3,805 3,284 $ 14,837 $ 18,024
Schedule of Reconciliation of Product Warranty Liability	The following table is a reconciliation of the changes in the Company’s product warranty liability (in thousands): Six Months Ended July 31, 2015 2014 Balance, beginning of year $ 1,262 $ 1,223 Additions 325 712 Settlements (641 ) (690 ) Balance, end of period $ 946 $ 1,245
Schedule of Restructuring Charges	A summary of the restructuring activities is as follows (in thousands): Severance Excess facility Other Total Balance January 31, 2014 $ 2,371 $ 511 $ 366 $ 3,248 Restructuring provision 1,185 1,810 67 3,062 Payments and other adjustments (3,556 ) (1,057 ) (433 ) (5,046 ) Balance January 31, 2015 — 1,264 — 1,264 Payments and other adjustments — (108 ) — (108 ) Balance July 31, 2015 $ — $ 1,156 $ — 1,156 Less noncurrent portion (403 ) Current portion of restructuring accrual $ 753

Equity Award and Employee Com24

Equity Award and Employee Compensation Plans (Tables)	6 Months Ended
	Jul. 31, 2015
Equity [Abstract]
Summary of Stock Option Activity	The following table summarizes the stock option activity related to shares of common stock under the Company’s 2005, 2012 Plans as well as the Inducement Awards (in thousands, except per share data): Outstanding Options Shares Number of Weighted- Weighted-Average Aggregate Balances, January 31, 2015 6,614 12,649 3.35 7.25 34,255 Additional shares authorized 4,702 RSUs granted (5,663 ) RSUs cancelled/forfeited 1,967 Options granted (2,234 ) 2,234 3.23 Options exercised — (634 ) 0.60 Options forfeited 301 (1,551 ) 0.53 Balances, July 31, 2015 5,687 12,698 $ 3.35 Options vested and expected to vest – July 31, 2015 5,501 $ 3.71 7.38 $ — Options exercisable – July 31, 2015 5,714 $ 2.88 7.00 $ 2,487 (1) Aggregate intrinsic value is based on the common stock price at each respective date presented. (2) Shares available for grant exclude inducement award forfeited.
Summary of Restricted Stock Units Activity	The table below summarizes the RSU activity under the Company’s 2005 and 2012 Plans (in thousands, except per share data): Number Weighted- Aggregate Balance, January 31, 2015 6,849 4.71 26,299 RSUs granted 5,667 3.53 RSUs vested (2,307 ) 4.62 RSUs cancelled/forfeited (1,967 ) 4.43 Balance, July 31, 2015 8,242 $ 3.98 $ 19,451 (1) Aggregate intrinsic value is based on the common stock price at each respective date presented.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jul. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments under Operating Leases	Future minimum lease payments under the Company’s operating leases as of July 31, 2015, are as follows (in thousands): Fiscal years ending January 31: Amount 2016 (remainder of) $ 1,969 2017 3,716 2018 294 $ 5,979

Segment Information and Custo26

Segment Information and Customer Concentration (Tables)	6 Months Ended
	Jul. 31, 2015
Segment Reporting [Abstract]
Schedule of Revenue and Property and Equipment, Net by Geographic Area	The following tables set forth revenue and property and equipment, net by geographic area (in thousands): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Revenue: Americas: United States $ 9,857 $ 12,443 $ 18,031 $ 21,945 Other Americas 29 34 61 331 9,886 12,477 18,092 22,276 Europe: United Kingdom 1,602 599 2,701 1,680 Other Europe 1,680 3,070 2,187 6,563 3,282 3,669 4,888 8,243 Asia Pacific: 2,135 2,447 4,424 6,207 $ 15,303 $ 18,593 $ 27,404 $ 36,726 July 31, January 31, Property and Equipment, Net: United States $ 8,761 $ 9,653 Europe 115 204 Asia Pacific 160 6 $ 9,036 $ 9,863

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	6 Months Ended
	Jul. 31, 2015
Earnings Per Share [Abstract]
Schedule of Computation of Historical Basic and Diluted Net Loss Per Share	The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share data): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Numerator: Net loss $ (24,382 ) $ (8,412 ) $ (50,884 ) (38,555 ) Denominator: Weighted-average common shares outstanding 96,588 91,432 96,042 88,879 Less: Weighted-average unvested common shares subject to repurchase — 22 — 40 Weighted-average shares used to compute net loss per share, basic and diluted 96,588 91,410 96,042 88,839 Net loss per share, basic and diluted $ (0.25 ) $ (0.09 ) $ (0.53 ) $ (0.43 )
Schedule of Common Stock Equivalents Excluded from Computation of Diluted Net Loss Per Share	The following potential common stock equivalents that could potentially dilute net loss per share in the future were excluded from the computation of diluted net loss per share because including them would have had an anti-dilutive effect for the periods presented (in thousands): Three Months Ended July 31, Six Months Ended July 31, 2015 2014 2015 2014 Convertible preferred stock (on an as converted basis) 21,.352 — 21,352 — Shares subject to outstanding common stock options and restricted stock units 20,940 20,678 20,940 20,678 Common stock warrants 164 84 164 84 Common stock subject to repurchase — 11 — 11 42,456 20,773 42,456 20,773

Organization and Summary of S28

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended
	Jul. 31, 2015	Jan. 31, 2015
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Restricted cash	$ 10,000,000	$ 2,300,000
Line of credit facility, expiration date	Jul. 24, 2015
Sale of PCIe product line, obligated to maintain escrow balance	$ 2,300,000
Repayment of escrow deposit	2,300,000
Silicon Valley Bank [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Credit facility	20,000,000
Drawn from line of credit facility	10,000,000
Restricted cash	$ 10,000,000

Cash Equivalents and Short-Te29

Cash Equivalents and Short-Term Investments - Cash Equivalents and Short-Term Investments by Type of Instrument (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 99,168	$ 60,473
Unrealized Gains	15	19
Unrealized Losses	(31)	(9)
Estimated Fair Value	99,152	60,483
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47,890	44,705
Unrealized Gains	13	14
Unrealized Losses	(25)	(8)
Estimated Fair Value	47,878	44,711
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	25,943	2,997
Estimated Fair Value	25,943	2,997
U.S. Government and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,734	7,807
Unrealized Gains	2	2
Unrealized Losses	(3)	(1)
Estimated Fair Value	13,733	7,808
Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3	4,964
Unrealized Gains		3
Unrealized Losses	(3)
Estimated Fair Value		$ 4,967
Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,598
Estimated Fair Value	$ 11,598

Cash Equivalents and Short-Te30

Cash Equivalents and Short-Term Investments - Amortized Cost and Fair Value of Investments by Contractual Years-to-Maturity (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Due within one year	$ 96,481	$ 60,473
Amortized Cost, Due within one to two years	2,687
Amortized Cost	99,168	60,473
Fair Value, Due within one year	96,464	60,483
Fair Value, Due within one to two years	2,688
Fair Value	$ 99,152	$ 60,483

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value of Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Cash equivalents:
Total cash equivalents	$ 32,445	$ 65,045
Short-term investments:
Total short term investments	66,707	60,483
Total assets measured at fair value	99,152	125,528
Commercial Paper [Member]
Cash equivalents:
Total cash equivalents	20,847	34,395
Short-term investments:
Total short term investments	5,096	2,997
Money Market Funds [Member]
Cash equivalents:
Total cash equivalents	11,598	24,534
Municipal Obligations [Member]
Short-term investments:
Total short term investments		4,967
Corporate Debt Securities [Member]
Cash equivalents:
Total cash equivalents		6,116
Short-term investments:
Total short term investments	47,878	44,711
U.S. Government and Agency Obligations [Member]
Short-term investments:
Total short term investments	13,733	7,808
Level 1 [Member]
Cash equivalents:
Total cash equivalents	11,598	24,534
Short-term investments:
Total assets measured at fair value	11,598	24,534
Level 1 [Member] | Money Market Funds [Member]
Cash equivalents:
Total cash equivalents	11,598	24,534
Level 2 [Member]
Cash equivalents:
Total cash equivalents	20,847	40,511
Short-term investments:
Total short term investments	66,707	60,483
Total assets measured at fair value	87,554	100,994
Level 2 [Member] | Commercial Paper [Member]
Cash equivalents:
Total cash equivalents	20,847	34,395
Short-term investments:
Total short term investments	5,096	2,997
Level 2 [Member] | Municipal Obligations [Member]
Short-term investments:
Total short term investments		4,967
Level 2 [Member] | Corporate Debt Securities [Member]
Cash equivalents:
Total cash equivalents		6,116
Short-term investments:
Total short term investments	47,878	44,711
Level 2 [Member] | U.S. Government and Agency Obligations [Member]
Short-term investments:
Total short term investments	$ 13,733	$ 7,808

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Jul. 31, 2015	Jan. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfer of assets measured at fair value between Level 1 and Level 2	$ 0	$ 0
Transfer of liabilities measured at fair value between Level 1 and Level 2	0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of convertible senior notes	$ 99,300,000	$ 111,900,000

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Components of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 31, 2015	Jan. 31, 2015
Receivables [Abstract]
Accounts receivable	$ 6,041	$ 15,680
Allowance for doubtful accounts	(36)	(39)
Allowance for sales returns	(263)	(561)
Accounts receivable, net	$ 5,742	$ 15,080

Balance Sheet Components - Sc34

Balance Sheet Components - Schedule of Inventory Components (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 4,552	$ 3,677
Finished goods	8,450	6,645
Inventory	$ 13,002	$ 10,322

Balance Sheet Components - Sc35

Balance Sheet Components - Schedule of Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 41,568	$ 38,771
Less: accumulated depreciation	(32,532)	(28,908)
Property and Equipment, Net	9,036	9,863
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	26,608	25,589
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,927	12,165
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	707	691
Office Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 326	$ 326

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Balance Sheet Components [Abstract]
Depreciation expense		$ 2,200	$ 2,500	$ 4,700	$ 5,900
Proceeds from sale of PCIe product line	$ 23,000				23,000
Gain on sale of PCIe product line	$ 17,400		$ 17,448		$ 17,448

Balance Sheet Components - Comp

Balance Sheet Components - Components of Intangibles and Other Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Purchased intellectual property	$ 5,577	$ 6,086
Deferred borrowing costs	3,244	4,032
Other	708	688
Intangibles and other assets	$ 9,529	$ 10,806

Balance Sheet Components - Sc38

Balance Sheet Components - Schedule of Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015	Jul. 31, 2014	Jan. 31, 2014
Payables and Accruals [Abstract]
Compensation and benefits	$ 5,659	$ 9,036
Purchase commitments	1,052	2,328
Accrued interest	1,700	1,700
Warranty	946	1,262	$ 1,245	$ 1,223
Restructuring charges	753	313
Professional fees	922	101
Other	3,805	3,284
Accrued liabilities	$ 14,837	$ 18,024

Balance Sheet Components - Sc39

Balance Sheet Components - Schedule of Reconciliation of Product Warranty Liability (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Payables and Accruals [Abstract]
Balance, beginning of year	$ 1,262	$ 1,223
Additions	325	712
Settlements	(641)	(690)
Balance, end of period	$ 946	$ 1,245

Balance Sheet Components - Sc40

Balance Sheet Components - Schedule of Restructuring Charges (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning balance		$ 1,264	$ 3,248	$ 3,248
Restructuring provision	$ 1,306		3,062	3,062
Payments and other adjustments		(108)		(5,046)
Restructuring charges, ending balance		1,156		1,264
Less noncurrent portion		(403)
Current portion of restructuring accrual		753		313
Severance and Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning balance			2,371	2,371
Restructuring provision				1,185
Payments and other adjustments				(3,556)
Excess Facility Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning balance		1,264	511	511
Restructuring provision				1,810
Payments and other adjustments		(108)		(1,057)
Restructuring charges, ending balance		$ 1,156		1,264
Other Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning balance			$ 366	366
Restructuring provision				67
Payments and other adjustments				$ (433)

Convertible Senior Notes and 41

Convertible Senior Notes and Line of Credit - Additional Information (Detail)	Oct. 31, 2014USD ($)	Sep. 19, 2014USD ($)d$ / shares	Jul. 31, 2015USD ($)	Jul. 31, 2015USD ($)	Jan. 31, 2015USD ($)
Debt Instrument [Line Items]
Convertible senior notes, net			$ 120,000,000	$ 120,000,000	$ 120,000,000
Line of credit facility, expiration date			Jul. 24, 2015
Debt instrument term				2 years
Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Credit facility			$ 20,000,000	$ 20,000,000
Silicon Valley Bank [Member] | Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility	$ 20,000,000		13,700,000	$ 13,700,000	$ 10,000,000
Line of credit facility, interest rate description				Borrowings under this facility will bear interest at a rate per annum of either (a) the sum of (i) the Eurodollar rate plus (ii) 5.00%, or (b) the sum of (i) ABR plus (ii) 2.00%. The Company had $13.7 million and $10.0 million outstanding on this facility at July 31, 2015 and January 31, 2015, respectively. The line of credit expires on October 24, 2016, subject to acceleration upon certain specified events of defaults.
Line of credit facility, expiration date	Oct. 24, 2016
Silicon Valley Bank [Member] | Eurodollar [Member] | Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate spread	5.00%
Silicon Valley Bank [Member] | ABR [Member] | Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate spread	2.00%
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible notes issued		$ 120,000,000
Convertible notes, issuance date				Sep. 19, 2014
Convertible notes, maturity date				Oct. 1, 2019
Proceeds from notes issued net of offering expenses		$ 115,400,000
Convertible notes, interest rate		4.25%
Convertible notes, periodicity of payment				Semi-annually
Convertible notes, periodic payment start date				Apr. 1, 2015
Convertible notes, redemption start date				Oct. 1, 2017
Convertible notes, redemption description				The Company may redeem the Notes, at its option, in whole or in part on or after October 1, 2017, if the last reported sale price per share of its common stock equals or exceeds 130% of the applicable conversion price for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on the trading day immediately prior to the date on which the Company delivers notice of the redemption.
Convertible notes, percentage of applicable conversion price required for redemption		130.00%
Number of trading days | d		20
Number of consecutive trading days		30 days
Convertible notes, initial conversion rate | $ / shares		$ 5.62
Convertible notes, common stock conversion rate per $1,000 principal amount				177.8489
Convertible notes, principal amount per conversion			1,000	$ 1,000
Convertible senior note repurchase price as percentage of principal amount				100.00%
Indebtedness description				During the time that the Notes are outstanding, the Company may not at any time incur any indebtedness other than permitted debt, which is defined as: (a) revolving debt secured by the Company’s accounts receivable and the proceeds therefrom in a principal amount not to exceed $50 million; (b) unsecured indebtedness (including the Notes) in a principal amount not to exceed (when combined with any indebtedness incurred under clause (c) below) $150 million; (c) secured indebtedness secured by the Company’s intellectual property in a principal amount not to exceed (when combined with any indebtedness incurred under clause (b) above) $150 million; and (d) unsecured subordinated indebtedness in a principal amount not to exceed $50 million. Furthermore, the Company may incur indebtedness if (a) the Company is not in default and such additional debt would not put it into default and (ii) the consolidated leverage ratio, as defined, after taking the additional debt into account does not exceed 5:1.
Convertible senior notes, net			120,000,000	$ 120,000,000
Convertible Senior Notes [Member] | Over-Allotment Option [Member]
Debt Instrument [Line Items]
Convertible notes issued		$ 15,000,000
Convertible Senior Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Convertible notes issued			50,000,000	$ 50,000,000
Consolidated leverage ratio				500.00%
Convertible Senior Notes [Member] | Maximum [Member] | Revolving Debt [Member]
Debt Instrument [Line Items]
Convertible notes issued			50,000,000	$ 50,000,000
Convertible Senior Notes [Member] | Maximum [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Convertible notes issued			150,000,000	150,000,000
Convertible Senior Notes [Member] | Maximum [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Convertible notes issued			$ 150,000,000	$ 150,000,000

Equity Award and Employee Com42

Equity Award and Employee Compensation Plans - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jul. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Beginning balance	6,614,000
Shares Available for Grant, RSUs granted	(5,667,000)
Shares Available for Grant, RSUs cancelled/forfeited	1,967,000
Shares Available for Grant, Ending balance	5,687,000
Number of Options, Beginning balance	12,649,000
Number of Options, Options granted	2,234,000
Number of Options, Options exercised	(634,000)
Number of Options, Options forfeited	(1,551,000)
Number of Options, Ending balance	12,698,000
Number of Options, Options vested and expected to vest	5,501,000
Number of Options, Options exercisable	5,714,000
Weighted-Average Exercise Price, Beginning balance	$ 3.35
Weighted-Average Exercise Price, Options granted	3.23
Weighted-Average Exercise Price, Options exercised	0.60
Weighted-Average Exercise Price, Options forfeited	0.53
Weighted-Average Exercise Price, Ending balance	3.35
Weighted-Average Exercise Price, Options vested and expected to vest	3.71
Weighted-Average Exercise Price, Options exercisable	$ 2.88
Weighted-Average Remaining Contractual Life (in years)	7 years 3 months
Weighted-Average Remaining Contractual Life (in years), Options vested and expected to vest	7 years 4 months 17 days
Weighted-Average Remaining Contractual Life (in years), Options exercisable	7 years
Aggregate Intrinsic Value, Beginning balance	$ 34,255
Aggregate Intrinsic Value, Options vested and expected to vest	0
Aggregate Intrinsic Value, Options exercisable	$ 2,487
Shares Available for Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Additional shares authorized	4,702,000
Number of Options, Options granted	(2,234,000)
Shares Available for Grant, Options forfeited	301,000
Restricted Stock Units (RSUs) [Member] | Shares Available for Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, RSUs granted	(5,663,000)
Shares Available for Grant, RSUs cancelled/forfeited	1,967,000

Equity Award and Employee Com43

Equity Award and Employee Compensation Plans - Additional Information (Detail) $ / shares in Units, $ in Millions	Feb. 01, 2015shares	Feb. 28, 2015shares	Jul. 31, 2015shares	Jul. 31, 2014shares	Jul. 31, 2015USD ($)Period$ / sharesshares	Jul. 31, 2014shares	Jan. 31, 2015shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding			12,698,000		12,698,000		12,649,000
Shares forfeited					1,551,000
Weighted average grant date fair value of options granted | $ / shares					$ 1.44
Total intrinsic value of options exercised | $					$ 2
Aggregate intrinsic value of vested RSUs | $					$ 8.3
RSUs vested					2,307,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increased share reserve					727,832
Shares authorized			2,327,832		2,327,832
Employee Stock Purchase Plan, shares have been reserved for issuance under the 2012 Purchase Plan					1,000,000
Employee Stock Purchase Plan, maximum percentage of annual salary that an employee is permitted to utilize			15.00%		15.00%
Employee Stock Purchase Plan, number of offering periods | Period					2
Employee Stock Purchase Plan, price of each shares issued is lower of the fair value per share of common stock					85.00%
2012 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards and options expiration period					7 years
Share awards and options vesting period					4 years
Shares outstanding							11,652,856
Increased share reserve	4,702,218
Shares authorized	16,355,074
Inducement Grant Stock Option Agreements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares related to options issued							6,250,000
Shares forfeited		1,250,000
Minimum [Member] | 2012 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock appreciation rights granted					100.00%
Maximum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan, duration of offering period					24 months
Employee Stock Purchase Plan, frequency of purchase date					6 months
Employee 401(k) Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee compensation plan, percentage of maximum contribution by employees					90.00%
Non-Employee Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, Company granted option to purchase common stock			0		0
Share based compensation, Company granted option to purchase restricted stock			0	309,000	0	309,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs vested						3,700,000
Restricted stock units withheld to cover the required withholding tax						786,000

Equity Award and Employee Com44

Equity Award and Employee Compensation Plans - Summary of Restricted Stock Units Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jul. 31, 2015	Jan. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of RSUs Outstanding, Beginning balance	6,849
Number of RSUs Outstanding, granted	5,667
Number of RSUs Outstanding, vested	(2,307)
Number of RSUs Outstanding, cancelled/forfeited	(1,967)
Number of RSUs Outstanding, Ending balance	8,242
Weighted-Average Grant Date Fair Value, Beginning balance	$ 4.71
Weighted-Average Grant Date Fair Value, granted	3.53
Weighted-Average Grant Date Fair Value, vested	4.62
Weighted-Average Grant Date Fair Value, cancelled/forfeited	4.43
Weighted-Average Grant Date Fair Value, Ending balance	$ 3.98
Aggregate Intrinsic Value	$ 19,451	$ 26,299

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation not yet recognized	$ 31,600,000		$ 31,600,000
Stock-based compensation not yet recognized, expects to amortize in fiscal 2016	7,900,000		7,900,000
Stock-based compensation not yet recognized, expects to amortize in fiscal 2017	11,100,000		11,100,000
Stock-based compensation not yet recognized, expects to amortize in fiscal 2018	7,200,000		7,200,000
Stock-based compensation not yet recognized, expects to amortize in fiscal 2019	4,700,000
Stock-based compensation not yet recognized, expects to amortize in fiscal 2020	600,000
Capitalized stock-based compensation expense	0
Stock-based compensation of non-employee awards	$ 200,000	$ 300,000	$ 200,000	$ 500,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 42,000	$ 30,000	$ 83,000	$ 36,000
Unrecognized tax benefits	$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Jul. 31, 2015USD ($)	Nov. 26, 2013Lawsuits	Jul. 31, 2015USD ($)	Jul. 31, 2014USD ($)	Jul. 31, 2015USD ($)	Jul. 31, 2014USD ($)	Jan. 31, 2015USD ($)
Loss Contingencies [Line Items]
Number of lawsuits filed | Lawsuits		4
Class action filing date					Nov. 26, 2013
Outstanding purchase commitments	$ 8,500,000
Advertising Commitment description					In June 2012, the Company entered into an agreement with the Forty Niners SC Stadium Company LLC, which was amended in April 2014. As part of the amended agreement, the Company will receive advertising and related benefits at the stadium in Santa Clara, California.
Advertising commitment	15,800,000		$ 15,800,000		$ 15,800,000
Forty Niners SC Stadium Company LLC [Member]
Loss Contingencies [Line Items]
Advertising expenses recognized			300,000	$ 0	600,000	$ 0
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Liabilities recorded for indemnification agreements	$ 0		$ 0		$ 0		$ 0

Commitments and Contingencies48

Commitments and Contingencies - Future Minimum Lease Payments under Operating Leases (Detail) $ in Thousands	Jul. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
2016 (remainder of)	$ 1,969
2,017	3,716
2,018	294
Total	$ 5,979

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) shares in Thousands	1 Months Ended			3 Months Ended		6 Months Ended
	Apr. 30, 2015	Jul. 31, 2013	Jun. 30, 2011	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Related Party Transaction [Line Items]
Common stock outstanding				96,999		96,999		93,872
Services Revenue [Member]
Related Party Transaction [Line Items]
Revenue recognized from related party				$ 64,000	$ 33,000	$ 100,000	$ 1,075,000
Toshiba Corporation [Member]
Related Party Transaction [Line Items]
Common stock outstanding				9,200		9,200
Percentage of common stock outstanding				9.00%		9.00%
Sales Agreement expiration period						2014-06
Sales Agreement renewal period						1 year
Prepayment received from related party		$ 16,000,000
Termination date of agreement					2014-05
Toshiba Corporation [Member] | Services Revenue [Member]
Related Party Transaction [Line Items]
Revenue recognized from related party					$ 1,000,000		1,000,000
Toshiba Corporation [Member] | Development of PCIe Cards [Member]
Related Party Transaction [Line Items]
Prepayment received from related party		8,000,000
Toshiba Corporation [Member] | Sample PCIe Cards [Member]
Related Party Transaction [Line Items]
Prepayment received from related party		$ 8,000,000
Toshiba Corporation [Member] | Flash Memory [Member]
Related Party Transaction [Line Items]
Sales agreement purchase percentage			70.00%
Toshiba Corporation [Member] | All Flash Array and services [Member]
Related Party Transaction [Line Items]
Revenue recognized from related party				$ 400,000	400,000	$ 900,000	900,000
Toshiba Corporation [Member] | NAND Flash Memory [Member]
Related Party Transaction [Line Items]
Purchases from related party				5,000	300,000	5,400,000	5,900,000
First Solar, Inc. [Member]
Related Party Transaction [Line Items]
Revenue recognized from related party					$ 0		$ 0
Sold to related party	$ 700,000
First Solar, Inc. [Member] | All Flash Array and services [Member]
Related Party Transaction [Line Items]
Revenue recognized from related party				$ 300,000		$ 500,000

Segment Information and Custo50

Segment Information and Customer Concentration - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2015Customer	Jul. 31, 2014Customer	Jul. 31, 2015CustomerSegment	Jul. 31, 2014Customer	Jan. 31, 2015Customer
Segment Reporting Information [Line Items]
Number of reportable segment | Segment			1
Number of operating segment | Segment			1
Number of customers	1	2	1	0
Number of customer accounted for accounts receivable			3		1
Largest Customers [Member]
Segment Reporting Information [Line Items]
Number of single customer accounted for revenue	5	5	5	5
Other Customers [Member]
Segment Reporting Information [Line Items]
Number of customer accounted for accounts receivable			0		0
Customer Concentration Risk [Member] | Revenue [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented	30.00%		18.00%	0.00%
Customer Concentration Risk [Member] | Revenue [Member] | Customer One [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented		13.00%
Customer Concentration Risk [Member] | Revenue [Member] | Customer Two [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented		10.00%
Customer Concentration Risk [Member] | Revenue [Member] | Largest Customers [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented	48.00%	42.00%	36.00%	30.00%
Customer Concentration Risk [Member] | Revenue [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented			10.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented					19.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented			21.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented			20.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Three [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented			19.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Percentage of customers represented			10.00%		10.00%

Segment Information and Custo51

Segment Information and Customer Concentration - Schedule of Revenue and Property and Equipment, Net by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Segment Reporting Information [Line Items]
Total Revenue	$ 15,303	$ 18,593	$ 27,404	$ 36,726
Property and equipment, net	9,036		9,036		$ 9,863
United States [Member]
Segment Reporting Information [Line Items]
Total Revenue	9,857	12,443	18,031	21,945
Property and equipment, net	8,761		8,761		9,653
Other Americas [Member]
Segment Reporting Information [Line Items]
Total Revenue	29	34	61	331
Americas [Member]
Segment Reporting Information [Line Items]
Total Revenue	9,886	12,477	18,092	22,276
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,602	599	2,701	1,680
Other Europe [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,680	3,070	2,187	6,563
Europe [Member]
Segment Reporting Information [Line Items]
Total Revenue	3,282	3,669	4,888	8,243
Property and equipment, net	115		115		204
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total Revenue	2,135	$ 2,447	4,424	$ 6,207
Property and equipment, net	$ 160		$ 160		$ 6

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Computation of Historical Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Numerator:
Net loss	$ (24,382)	$ (8,412)	$ (50,884)	$ (38,555)
Denominator:
Weighted-average common shares outstanding	96,588	91,432	96,042	88,879
Less: Weighted-average unvested common shares subject to repurchase		22		40
Weighted-average shares used to compute net loss per share, basic and diluted	96,588	91,410	96,042	88,839
Net loss per share, basic and diluted	$ (0.25)	$ (0.09)	$ (0.53)	$ (0.43)

Net Loss Per Share - Schedule53

Net Loss Per Share - Schedule of Common Stock Equivalents Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from computation of diluted net loss per share	42,456	20,773	42,456	20,773
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from computation of diluted net loss per share	21,352		21,352
Shares Subject to Outstanding Common Stock Options and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from computation of diluted net loss per share	20,940	20,678	20,940	20,678
Common Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from computation of diluted net loss per share	164	84	164	84
Common Stock Subject to Repurchase [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from computation of diluted net loss per share		11		11