Violin Memory (VMEMQ) 10-Q 6 Jun 14 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Apr. 30, 2014	30-May-14
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Apr-14	'
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'VMEM	'
Entity Registrant Name	'Violin Memory Inc	'
Entity Central Index Key	'0001407190	'
Current Fiscal Year End Date	'--01-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	90,140,241

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$47,893	$40,273
Short-term investments	39,102	59,106
Accounts receivable, net (including amounts due from a related party of $309 and $565 as of April 30, 2014 and January 31, 2014, respectively)	15,191	21,055
Inventory	38,198	39,653
Other current assets	9,085	6,154
Total current assets	149,469	166,241
Property and equipment, net	13,502	13,653
Other assets	5,117	4,769
Total assets	168,088	184,663
Current liabilities:	'	'
Line of credit	7,500	'
Accounts payable (including amounts due to a related party of $11,370 and $12,208 as of April 30, 2014 and January 31, 2014, respectively)	22,794	18,389
Accrued liabilities (including amounts due to a related party of $5,848 and $6,875 as of April 30, 2014 and January 31, 2014, respectively)	31,381	37,315
Deferred revenue (including amounts received from a related party of $69 and $89 as of April 30, 2014 and January 31, 2014, respectively)	14,096	13,480
Total current liabilities	75,771	69,184
Long-term deferred revenue (including amounts received from a related party of $41 and $43 as of April 30, 2014 and January 31, 2014, respectively)	12,006	11,755
Total liabilities	87,777	80,939
Commitments and contingencies (Note 8)	'	'
Stockholders' equity:	'	'
Preferred stock, $0.0001 par value, 10,000 shares authorized as of April 30, 2014; no shares outstanding	'	'
Common stock, $0.0001 par value, 1,000,000 shares authorized as of April 30, 2014; 87,747 and 83,057 shares issued and outstanding as of April 30, 2014 and January 31, 2014, respectively	9	8
Additional paid-in capital	463,063	456,223
Accumulated other comprehensive income	4	115
Accumulated deficit	-382,765	-352,622
Total stockholders' equity	80,311	103,724
Total liabilities and stockholders' equity	$168,088	$184,663

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, except Per Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Accounts receivable, amounts due from a related party	$309	$565
Accounts payable, amounts due to a related party	11,370	12,208
Accrued liabilities, amounts due to a related party	5,848	6,875
Deferred revenue from related party	69	89
Long-term deferred revenue from related party	$41	$43
Preferred stock, par value	$0.00	'
Preferred stock, shares authorized	10,000	'
Preferred stock, shares outstanding	0	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,000,000	1,000,000
Common stock, shares issued	87,747	83,057
Common stock, shares outstanding	87,747	83,057

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014		Apr. 30, 2013
Revenue:	'		'
Product revenue (including related party sales of $491 and $1,651 for the three months ended April 30, 2014 and 2013, respectively)	$12,773		$22,478
Service revenue (including related party sales of $1,042 and $56 for the three months ended April 30, 2014 and 2013, respectively)	5,360		2,320
Total revenue	18,133		24,798
Cost of revenue:	'		'
Cost of product revenue (including related party purchases of $5,625 and $7,281 for the three months ended April 30, 2014 and 2013, respectively)	6,666	[1]	13,077	[1]
Cost of service revenue	1,898	[1]	1,649	[1]
Total cost of revenue	8,564	[1]	14,726	[1]
Gross profit	9,569		10,072
Operating expenses :	'		'
Sales and marketing	16,233	[1]	18,252	[1]
Research and development	15,836	[1]	15,934	[1]
General and administrative	5,832	[1]	4,110	[1]
Restructuring and transition	1,756		'
Total operating expenses	39,657		38,296
Loss from operations	-30,088		-28,224
Other income (expense), net	119		-280
Interest expense	-168		'
Loss before income taxes	-30,137		-28,504
Income taxes	6		20
Net loss	($30,143)		($28,524)
Net loss per share of common stock, basic and diluted	($0.35)		($1.86)
Shares used to compute net loss per share of common stock, basic and diluted	85,951		15,358
[1]	Includes stock-based compensation expense as follows (Note 6): Cost of product revenue $ 179 $ 17 Cost of service revenue 87 226 Sales and marketing 1,437 1,517 Research and development 4,266 1,360 General and administrative 1,671 1,701 $ 7,640 $ 4,821

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Cost of product revenue, related party purchases	$5,625	$7,281
Stock-based compensation expense	7,640	4,821
Product Revenue [Member]	'	'
Revenue from related party sales	491	1,651
Services Revenue [Member]	'	'
Revenue from related party sales	1,042	56
Cost of Product Revenue [Member]	'	'
Stock-based compensation expense	179	17
Cost of Service Revenue [Member]	'	'
Stock-based compensation expense	87	226
Sales and Marketing [Member]	'	'
Stock-based compensation expense	1,437	1,517
Research and Development [Member]	'	'
Stock-based compensation expense	4,266	1,360
General and Administrative [Member]	'	'
Stock-based compensation expense	$1,671	$1,701

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Net loss	($30,143)	($28,524)
Foreign currency translation adjustments	-111	-8
Comprehensive loss	($30,254)	($28,532)

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Cash flows from operating activities:	'	'
Net loss	($30,143)	($28,524)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	3,010	2,507
Provision for excess and obsolete inventory	242	'
Accretion of interest	167	'
Stock-based compensation	7,640	4,821
Changes in operating assets and liabilities, net:	'	'
Accounts receivable	5,864	-33
Inventory	-216	-1,628
Other assets	-3,571	196
Accounts payable	4,145	2,633
Accrued liabilities	-5,014	2,567
Deferred revenue	867	5,042
Net cash used in operating activities	-17,009	-12,419
Cash flows from investing activities:	'	'
Purchase of property and equipment	-1,045	-1,469
Purchase of short-term investments	-11,214	'
Maturities of short-term investments	31,218	'
Net cash provided by (used in) investing activities	18,959	-1,469
Cash flows from financing activities:	'	'
Proceeds from issuance of preferred stock, net of issuance costs	'	12,138
Proceeds from line of credit	7,500	'
Initial public offering costs	'	-451
Taxes paid on net settlement of shares	-3,212	'
Proceeds from exercise of common stock options	1,493	47
Net cash provided by financing activities	5,781	11,734
Effect of exchange rates on cash and cash equivalents	-111	-8
Net increase (decrease) in cash and cash equivalents	7,620	-2,162
Cash and cash equivalents at beginning of period	40,273	17,378
Cash and cash equivalents at end of period	47,893	15,216
Supplemental disclosure of other cash flow information:	'	'
Taxes paid	12	9
Interest paid	27	'
Supplemental disclosure of non-cash investing and financing activities:	'	'
Non cash accruals related to fixed asset purchases	260	101
Transfer of inventory to property and equipment	356	1,434
Vesting of early stock option exercises	$36	$51

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Apr. 30, 2014
Accounting Policies [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 Flash Memory 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. These systems’ embedded software function together with the hardware to deliver their essential functionality. The Company also recently introduced the Violin Symphony Management Software Suite and Maestro Memory Services Software Suite as software offerings enhancing the process to manage, monitor and protect application data in the enterprise data center. 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 present 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, 2014, filed with the SEC on April 16, 2014. The results of operations for the three months ended April 30, 2014 are not necessarily indicative of the results to be expected for any subsequent interim period, the year ended January 31, 2015 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 the respective period.
	Gains and losses from foreign currency transactions are included in other income (expense), 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 in its provision for doubtful accounts. Actual results could differ from those estimates.
	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, 2014 filed with the SEC on April 16, 2014. 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
	In March 2013, the FASB issued an accounting standard update requiring an entity to release into net income the entire amount of a cumulative translation adjustment related to its investment in a foreign entity when as a parent it either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets within a foreign entity. This accounting standard update was effective prospectively for the Company beginning in the first quarter of fiscal 2015. The adoption of this accounting standard update did not have a material impact on the Company’s condensed consolidated financial statements.
	In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carry-forward, a Similar Tax Loss, or a Tax Credit Carry-forward Exists, which is effective for the periods beginning after December 15, 2013. The new guidance provides that a liability related to an unrecognized tax benefit would be presented as a reduction of a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. The new guidance became effective for the Company on February 1, 2014, and was applied prospectively to unrecognized tax benefits that existed at the effective date. The adoption of this new guidance did not have a material impact on the Company’s condensed consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, a converged standard on revenue recognition. The new pronouncement requires revenue recognition to depict the transfer of promised goods or services to customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also specifies the accounting for some costs to obtain or fulfil a contract with a customer, as well as enhanced disclosure requirements. ASU 2014-9 is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting periods. Early adoption is not permitted. The Company is currently in the process of evaluating the impact of the adoption will have on its consolidated financial statements.

Cash_Equivalents_and_ShortTerm

Cash Equivalents and Short-Term Investments	3 Months Ended
	Apr. 30, 2014
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):
		April 30, 2014
		Amortized		Unrealized		Unrealized			Estimated Fair
		Cost		Gains		Losses			Value
	Money market funds	$	37	$	—	$	—		$	37
	Commercial paper		19,848		—		—			19,848
	Corporate debt securities		11,918		4		(2	)		11,920
	U.S. government and agency obligations		9,553		4		(1	)		9,556
	Municipal obligations		13,690		6		—			13,696
	Total investments	$	55,046	$	14	$	(3	)	$	55,057
	Reported as:
	Cash equivalents	$	15,955	$	—	$	—		$	15,955
	Short-term investments		39,091		14		(3	)		39,102
	Total investments	$	55,046	$	14	$	(3	)	$	55,057
		January 31, 2014
		Amortized		Unrealized		Unrealized			Estimated Fair
		Cost		Gains		Losses			Value
	Money Market funds	$	15,229	$	—	$	—		$	15,229
	Commercial paper		19,097		—		—			19,097
	Corporate debt securities		8,134		4		(3	)		8,135
	U.S. government and agency obligations		29,130		5		(3	)		29,132
	Municipal obligations		18,434		8		—			18,442
		$	90,024	$	17	$	(6	)	$	90,035
	Reported as:
	Cash equivalents	$	30,929	$	—	$	—		$	30,929
	Short-term investments		59,095		17		(6	)		59,106
	Total investments	$	90,024	$	17	$	(6	)	$	90,035
	Short-term investments as of April 30, 2014 and January 31, 2014 consist of U.S. corporate debt securities, U.S. government and municipal debt and agency obligations and commercial paper.
	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. For the three months ended April 30, 2014, the Company’s realized gains or losses on short-term investments were not material.
	The amortized cost and fair value of investments held as of April 30, 2014, by contractual years-to-maturity, are as follows (in thousands):
		Amortized		Fair
		Cost		Value
	Due within one year	$	46,367	$	46,374
	Due within one to two years		8,679		8,683
		$	55,046	$	55,057
	Included in the investment balances in the tables above is accrued interest related to purchased investments of approximately $0.3 million as of April 30, 2014 and January 31, 2014, respectively.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Apr. 30, 2014
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):
		April 30, 2014
		Level 1		Level 2		Level 3		Total
	Money market funds	$	37	$	—	$	—	$	37
	Corporate debt securities		—		11,920		—		11,920
	U.S. government and agency obligations		—		9,556		—		9,556
	Municipal obligations		—		13,696		—		13,696
	Commercial paper		—		19,848		—		19,848
		$	37	$	55,020	$	—	$	55,057
		January 31, 2014
		Level 1		Level 2		Level 3		Total
	Money market funds	$	15,229	$	—	$	—	$	15,229
	Corporate debt securities		—		8,135		—		8,135
	U.S. government and agency obligations		—		29,132		—		29,132
	Municipal obligations		—		18,442		—		18,442
	Commercial paper		—		19,097		—		19,097
		$	15,229	$	74,806	$	—	$	90,035
	Included in the investment balances in the tables above is accrued interest related to purchased investments of approximately $0.3 million as of April 30, 2014 and January 31, 2014, respectively.
	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 federal 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 have been no transfers between Level 1 and 2 during the three months ended April 30, 2014 and year ended January 31, 2014.
	Fair Value of Other Financial Instruments
	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	3 Months Ended
	Apr. 30, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Balance Sheet Components	'
	4. Balance Sheet Components
	Accounts Receivable
	The following table shows the components of accounts receivable, net (in thousands):
			April 30, 2014			January 31, 2014
	Accounts receivable		$	15,384		$	21,248
	Reserve for sales returns and allowances			(193	)		(193	)
			$	15,191		$	21,055
	Inventory
	The following table shows the components of inventory (in thousands):
			April 30, 2014			January 31, 2014
	Raw materials		$	19,223		$	15,326
	Finished goods			18,975			24,327
			$	38,198		$	39,653
	Property and equipment, net
	The following table shows the components of property and equipment (in thousands):
			April 30, 2014			January 31, 2014
	Laboratory equipment		$	24,078		$	22,854
	Computer hardware and software			12,479			11,440
	Office furniture			305			305
	Leasehold improvements			310			310
				37,172			34,909
	Less: accumulated depreciation			(23,670	)		(21,256	)
			$	13,502		$	13,653
	Depreciation expense (including amortization of leasehold improvements and intangibles) was $3.0 million and $2.5 million for the three months ended April 30, 2014 and 2013, respectively.
	Accrued liabilities
	The following table shows the components of accrued liabilities (in thousands):
			April 30, 2014			January 31, 2014
	Compensation and benefits		$	8,514		$	10,805	*
	Customer advance from Toshiba (Note 10)			5,848			6,875
	Accrued vendor payables			6,890			6,661
	Restructuring and transition charges			2,294			3,248
	Professional fees			3,100			4,635	*
	Warranty			1,324			1,223
	Other			3,411			3,868	*
			$	31,381		$	37,315
	*	Reflects the reclassification of certain amounts within total accrued liabilities as of January 31, 2014 from other accrued liabilities to compensation and benefits and professional fees.
	Accrued Warranty
	The following table is a reconciliation of the changes in the Company’s aggregate product warranty liability (in thousands):
			Three Months
			Ended April 30,
			2014			2013
	Balance, beginning of period		$	1,223		$	994
	Additions			474			436
	Settlements			(373	)		(231	)
	Balance, end of period		$	1,324		$	1,199
	Accumulated Other Comprehensive Income
	The components of accumulated other comprehensive income (loss) as of April 30, 2014 and January 31, 2014, net of tax, were as follows (in thousands):
			Foreign			Net			Total
			Currency			Unrealized
			Translation			Gain (Loss)
			Adjustments			on Short
						Term
						Investments
	Accumulated other comprehensive income as of January 31, 2014		$	104		$	11		$	115
	Other comprehensive loss, net of tax			(111	)		—			(111	)
	Accumulated other comprehensive income (loss) as of April 30, 2014		$	(7	)	$	11		$	4
	The Company did not have any reclassifications out of accumulated other comprehensive income (loss) for the three months ended April 30, 2014 and year ended January 31, 2014. The Company did not recognize any other-than-temporary impairment on its available-for-sale securities for the periods presented.

Equity_Award_and_Employee_Comp

Equity Award and Employee Compensation Plans	3 Months Ended
	Apr. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Equity Award and Employee Compensation Plans	'
	5. Equity Award and Employee Compensation Plans
	The 2012 Stock Plan
	In November 2012, the Company’s stockholders approved the adoption of the of the 2012 Stock Incentive Plan (the “2012 Stock Plan”) as the successor plan to the 2005 Stock Plan effective at the completion of the Company’s IPO. Unexercised options under the 2005 Plan that cancel due to a grantee’s termination may be reissued under the 2012 Stock Plan. Under the 2012 Stock 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. These share awards and options generally expire seven years from the date of grant. Such share awards and options generally vest ratably over three to four years.
	Shares authorized under the 2012 Plan include 9,088,950 shares subject to outstanding awards and shares subject to vesting restrictions under the Company’s 2005 Plan and 7,500,000 shares which were authorized under the 2012 Plan. The reserve will automatically increase on the first day of each fiscal year beginning on February 1, 2014 in an amount equal to the lesser of (i) 5% of the outstanding shares of common stock on the last day of the immediately preceding fiscal year, or (ii) another amount determined by the Board of Directors. As of February 1, 2014, the share reserve increased by 4,150,000, to an aggregate of 11,650,000 authorized under the plan. The 2012 Stock 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. In addition, during the quarter ended April 30, 2014, the Company issued Inducement Awards totaling 6,250,000 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.
	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
			Available			Options			Average		Remaining		Intrinsic
			for Grant						Exercise Price		Contractual Life		Value (1)
											(in years)
	Balances, January 31, 2014			5,459			5,230		$	1.43		7.23	$	19,770
	Additional shares authorized (2)			10,400
	RSUs granted			(942	)		—			—
	Recovery of shares from RSU net settlement			763			—			—
	RSUs cancelled/forfeited			1,670			—			—
	Options granted (2)			(8,439	)		8,439			4
	Options exercised						(1,216	)		1.02
	Options forfeited			147			(147	)		2.86
	Balances, April 30, 2014			9,058			12,306		$	3.22		7.92	$	44,302
	Options vested and expected to vest – April 30, 2014						12,109		$	3.22		7.94	$	43,592
	Options exercisable – April 30, 2014						3,292		$	1.21		7.27	$	11,851
	-1	Aggregate intrinsic value is based on the common stock price at each respective date presented.
	-2	Includes 4,150,000 shares added to the 2012 Plan and 6,250,000 shares related to options issued under Inducement Grant Stock Option Agreements.
	The weighted average grant date fair value of options granted during the quarter ended April 30, 2014 was $1.73 per share. The total intrinsic value of options exercised during the quarter ended April 30, 2014 was $3.8 million.
	Restricted Stock Units
	The Company’s outstanding restricted stock units, or RSUs, vest upon the satisfaction of both a service condition and a liquidity condition. The service condition for the majority of these awards is satisfied over three to four years. The liquidity condition was satisfied with the Company’s initial public offering, or IPO, and settled in March 2014. Share-based compensation expense related to these grants is based on the grant date fair value of the RSUs and is recognized on a straight-line basis over the applicable service period.
	The table below summarizes the RSU activity under the Company’s 2005 and 2012 Plans (in thousands, except per share data):
			Number			Weighted-			Aggregate
			of RSUs			Average			Intrinsic
						Grant Date			Value (1)
						Fair Value
	Balance, January 31, 2014			15,077		$	6.09		$	56,990
	RSUs granted			942			4.22
	RSUs vested			(4,393	)		4.21
	RSUs cancelled/forfeited			(1,670	)		5.88
	Balance, April 30, 2014			9,956		$	5.72		$	35,840
	-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 quarter ended April 30, 2014 amounted to $18.6 million.
	For the three months ended April 30, 2014, vested RSUs include 3.7 million for which the service condition was satisfied and vested in March 2014 upon satisfaction of the liquidity condition. Under net settlement procedures applicable to the March 2014 vesting dates, approximately 763,000 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 are delivered to the recipient as shares of the Company’s common stock.
	Non-employee Stock Options and Awards
	For the three months ended April 30, 2014, the Company did not grant any options to non-employees. For the three months ended April 30, 2013, the Company granted 5,000 stock options to a non-employee. For the three months ended April 30, 2014, the Company granted approximately 309,000 restricted shares of common stock to non-employees. For the three months ended April 30, 2013, the Company did not grant any 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”). Upon adoption a total of 1,000,000 shares have been reserved for issuance under the 2012 Purchase Plan, and the number of shares available for issuance under the 2012 Purchase Plan automatically increases on February 1 each year, beginning in 2014, by the lesser of 0.75% of the shares of common stock then outstanding or 1,000,000 shares. On February 1, pursuant to the provisions of the plan, the share reserved was increased by 600,000 shares to an aggregate of 1,600,000 shares reserved under the 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 27 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 in the case of an offering period that commenced on the IPO, 85% of the price at which one share of stock was offered to the public in the IPO, 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 at any time.
	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.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Apr. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	6. Stock-Based Compensation
	As of April 30, 2014, total stock-based compensation cost related to unvested equity awards not yet recognized, net of estimated forfeitures, totaled $42.2 million. The Company expects, based upon equity awards outstanding as of April 30, 2014, to amortize $14.1 million during the remainder of fiscal 2015, $16.1 million in fiscal 2016, $8.6 million in fiscal 2017, $3.2 million in fiscal 2018 and $0.2 million in fiscal 2019. There was no capitalized stock-based compensation expense for any period presented.
	The Company uses the Black-Scholes option pricing model to estimate the fair value of options and purchase rights under the ESPP. This model requires the input of highly subjective assumptions including the expected term of the option, expected stock price volatility, dividend yield and risk-free interest rate. The Company used the following assumptions:
	Stock options	Three Months Ended
		April 30, 2014
	Expected life of options (in years)	5.15
	Expected volatility	47.70%
	Risk-free interest rate	1.50%
	Dividend yield	0%
	Stock based compensation associated with non-employee awards was approximately $0.2 million and $0.3 million for the quarters ended April 30, 2014 and 2013, respectively.
	Employee stock purchase plan	Three Months Ended
		April 30, 2014
	Expected life of options (in years)	2.18
	Expected volatility	45.60%
	Risk-free interest rate	0.12%
	Dividend yield	0%
	During the three months ended April 30, 2014, the Company accelerated vesting of certain options and RSU awards, consistent with the original terms of the awards as a result of the Company’s restructuring initiatives, and recognized incremental charges related to equity awards of approximately $2.0 million in the condensed consolidated statement of operations.

Income_Taxes

Income Taxes	3 Months Ended
	Apr. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	7. 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 April 30, 2014 and 2013 was $6,000 and $20,000, respectively. As of April 30, 2014, 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 April 30, 2014, the Company had no unrecognized tax benefits that would affect the Company’s effective tax rate if recognized.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Apr. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	8. Commitments and Contingencies
	Litigation
	On August 22, 2012, GCA Savvian Advisors, LLC (“Savvian”) filed an action against the Company in the San Francisco County Superior Court, alleging breach of contract under a financial advisory services agreement. On November 2, 2012, the Company filed a response denying Savvian’s allegations and a cross-complaint against Savvian for fraud, breach of fiduciary duty, negligent representation and breach of contract. On December 7, 2012, Savvian filed a motion to dismiss, which was denied by the court on March 13, 2013. Savvian filed a response to the Company’s complaint on March 26, 2013, denying the Company’s allegations and asserting additional defenses. On August 26, 2013, Savvian filed an amended complaint seeking payment of offering fees totaling $10 million, as well as interest, damages and attorney’s fees. The Company filed a response to the amended complaint on October 2, 2013, and again denied the allegations. The parties are engaged in discovery. Trial in the matter is scheduled for July 2014.
	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 several underwriters of the Company’s September 27, 2013 IPO. The four complaints have been consolidated into a single, putative class action, and lead co-lead plaintiffs have been appointed by the court. On March 28, 2014, a consolidated complaint was filed. The complaint purports to assert claims under the federal securities laws on behalf of purchasers of our common stock issued in the IPO, and seeks damages in an unspecified amount and other relief. On April 18, 2014, the defendants filed a motion to dismiss the complaint. That motion is now pending before the court, and a hearing is scheduled for June 17, 2014. It is not known when the court will rule on the motion.
	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, it is alleged 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 court has approved a stipulation among the parties to stay the derivative action pending resolution of the motion to dismiss the complaint in the putative class action.
	The Company intends to defend itself vigorously in both securities actions.
	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 April 30, 2014 and January 31, 2014.
	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 April 30, 2014, are as follows (in thousands):
	Years ending January 31:
	2015 (remaining)	$	2,255
	2016		3,638
	2017		3,515
	2018		294
		$	9,702
	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 the materials when received and services once they are completed. As of April 30, 2014, the Company had approximately $6.9 million of outstanding purchase commitments to such contract manufacturer and other vendors.
	In July 2013, the Company entered into an OEM agreement with a software vendor, which obligates the Company to pay up to an aggregate of $12.0 million, upon the software vendor meeting certain delivery milestones through December 2014. No milestones had been completed during the three months ended April 30, 2014. As of April 30, 2014, the remaining purchase commitment totaled $6.0 million.
	In July 2012, we entered into an OEM agreement with a software vendor, which obligates us to pay an aggregate of $5.0 million in minimum royalty fees over a three-year period beginning after the first commercial shipment of the related product. The Company made the first commercial shipment in April 2013 and began paying royalties. As of April 30, 2014, the remaining purchase commitment was $3.9 million.
	Advertising Commitment
	In June 2012, the Company entered into an agreement with the Forty Niners SC Stadium Company LLC, or the Team. As part of this agreement, the Company will receive advertising and related benefits at the stadium under construction in Santa Clara, California from 2014 through 2023. Under the agreement, the Company was committed to make payments to the Team of $4.0 million per year beginning in fiscal 2015 and for nine years thereafter. In April 2014, the Company entered into an amendment of the agreement, whereby the total commitment over the 10 year term was reduced to $1.75 million per year. Under this new agreement, the Company’s space and seating, signage space and certain other provisions have been reduced. The balance of the Company’s first year’s payments of $1.25 million is due to be paid on November 5, 2014. There have been no amounts recognized in advertising expenses related to this agreement for the three months ended April 30, 2014, as the advertising activity is expected to be recognized over the periods benefited by the agreement once the stadium commences operations.
	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.

RelatedParty_Transactions

Related-Party Transactions	3 Months Ended
	Apr. 30, 2014
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	9. Related-Party Transactions
	Toshiba
	As of April 30, 2014, 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 10% 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 Company purchased $5.6 million and $7.3 million of NAND flash memory from Toshiba during the three months ended April 30, 2014 and 2013, respectively.
	Toshiba also resells the Company’s products in Japan. The Company recognized revenue of $0.5 million and $1.7 million related to the sale of Flash Memory Arrays and services to Toshiba during the three months ended April 30, 2014 and 2013, 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 million. The $16 million prepayment consisted of $8 million for services to be performed for the development of the PCIe cards and $8 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 applied ASC 605-25 to identify the deliverables. The Company concluded that the deliverables are development services, sample PCIe cards and support services for the sample PCIe cards. The Company recognized $6.0 million of revenue related to development of PCIe cards and $3.2 million of revenue related to sample products during fiscal 2014 as determined on a relative fair value basis. For the three months ended April 30, 2014, the Company had recognized an additional $1.0 million under the agreement related to development services performed.
	In May 2014, the Company entered into a mutual termination agreement with Toshiba to terminate its development of PCIe cards. Under the agreement, the remaining portion of prepaid development services and sample cards as of April 30, 2014 of $5.8 million, was refunded to Toshiba.

Restructuring_and_Transition_C

Restructuring and Transition Charges	3 Months Ended
	Apr. 30, 2014
Restructuring And Related Activities [Abstract]	'
Restructuring and Transition Charges	'
	10. Restructuring and Transition Charges
	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 Flash Memory Array market, the Company also decided to evaluate strategic alternatives for its PCIe Flash Memory Card product line and engaged an investment banker (See Note 14).
	The Company’s restructuring and transition 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 be 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 global reorganization of the Company.
	As of April 30, 2014, total restructuring and transition charges incurred to date were $6.6 million, primarily relating to severance and benefits.
	Information related to the Company's restructuring and transition related activities for the three months ended April 30, 2014 is as follows (in thousands):
		Severance			Excess Facility			Other Charges			Total
		and related			charges
		charges
	Balance January 31, 2014	$	2,371		$	511		$	366		$	3,248
	Restructuring provision		858			834			64			1,756
	Payments		(2,148	)		(145	)		(417	)		(2,710	)
	Balance April 30, 2014	$	1,081		$	1,200		$	13		$	2,294

Segment_Information_and_Custom

Segment Information and Customer Concentration	3 Months Ended
	Apr. 30, 2014
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 table sets forth revenue and property and equipment by geographic area (in thousands):
		Three Months Ended April 30,
		2014		2013
	Revenue:
	Americas:
	United States	$	9,501	$	17,507
	Other Americas		297		14
			9,798		17,521
	Europe:
	United Kingdom		1,082		629
	Other Europe		3,493		2,123
			4,575		2,752
	Asia Pacific:		3,760		4,525
		$	18,133	$	24,798
		April 30,		January 31,
		2014		2014
	Property and Equipment:
	United States	$	13,129	$	13,232
	Europe		367		415
	Asia Pacific		6		6
		$	13,502	$	13,653
	Customer Concentration
	For the three months ended April 30, 2014, no customer represented 10% or more of net revenue. For the three months ended April 30, 2013, revenue from Avnet, Inc. represented 24% of net revenue, with no other single customer accounting for more than 10% of revenue. Revenue from the Company’s five largest customers for the three months ended April 30, 2014 and 2013 was 36% and 48%, 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 April 30, 2014, there were no customers that represented 10% or more of the accounts receivable balance. At January 31, 2014, Commtech Innovative Solutions and Avnet represented 27% and 15% of accounts receivable, respectively, with no other customers accounting for more than 10% of the accounts receivable balance.

Net_Loss_Per_Share

Net Loss Per Share	3 Months Ended
	Apr. 30, 2014
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 preferred stock, 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
		April 30,
		2014			2013
	Numerator:
	Net loss	$	(30,143	)	$	(28,524	)
	Denominator:
	Weighted average common shares outstanding		86,003			15,645
	Less: Weighted average unvested common shares subject to repurchase		52			287
	Weighted average shares used to compute net loss per share of common stock, basic and diluted		85,951			15,358
	Net loss per share of common stock, basic and diluted	$	(0.35	)	$	(1.86	)
	Since the Company experienced losses for all periods presented, basic net loss per share is the same as diluted net loss per share for all periods. 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 been anti-dilutive for the periods presented (in thousands):
		Three Months Ended April 30,
		2014			2013
	Convertible preferred stock (on an as converted basis)		—			23,536
	Common stock subject to repurchase		34			219
	Warrants related to common stock		84			—
	Shares subject to outstanding common stock options and restricted stock units		22,262			16,162
			22,380			39,917

Debt_and_Line_of_Credit

Debt and Line of Credit	3 Months Ended
	Apr. 30, 2014
Debt Disclosure [Abstract]	'
Debt and Line of Credit	'
	13. Debt and Line of Credit
	Debt Facility
	During May 2013, the Company entered into a $50 million debt arrangement with TriplePoint Capital LLC, or TriplePoint. The facility had first secured interest in substantially all of the Company’s assets and intellectual property other than $7.5 million of accounts receivable. The Company had one year to utilize the facility, which had a number of borrowing options ranging in duration from three months up to five years. Depending on the loan option, annualized interest rates range from 7.0% to 13.5%. In addition, the loans had an end-of-term payment, ranging from 0.5% to 14.0% of the principal amount depending on the duration of the loan. As of April 30, 2014, the Company had no amounts outstanding on this facility.
	In May 2014, the Company terminated its loan agreement with TriplePoint Capital, LLC which was due to expire May 12, 2014. Pursuant to the agreement, TriplePoint has released all collateral under the loan agreement.
	Line of Credit
	The Company can borrow up to 80% of its current U.S.-based receivables, or $7.5 million, whichever is lower. The line is secured against the Company’s accounts receivable and collections thereof as well as its intellectual property. The line, which expires in July 2015, has a term of two years and bears the interest rate of prime plus 1% (4.25% as of April 30, 2014). As of April 30, 2014, the Company had $7.5 million outstanding on its line of credit.

Subsequent_events

Subsequent events	3 Months Ended
	Apr. 30, 2014
Subsequent Events [Abstract]	'
Subsequent events	'
	In May 2014, the Company terminated its loan agreement with TriplePoint Capital, LLC (See Note 13).
	In May 2014, the Company entered into a mutual termination agreement with Toshiba effective April 30, 2014 (See Note 9).
	On May 29, 2014, the Company entered into an asset purchase agreement with SK hynix Inc. (“SK hynix”) to sell certain intellectual property rights and fixed assets, primarily related to its PCIe product line. As consideration, SK hynix agreed to pay the Company $23.0 million and to assume certain employee-related liabilities of approximately $0.5 million. Under the agreement, ten percent (10%), or approximately $2.3 million, of the purchase price will be held in escrow for a period of twelve months, in support of general indemnifications, warranties and covenants. The purchase price is subject to a downward adjustment to the extent certain conditions are not satisfied. The Company expects to incur fees and expenses of approximately $4 million upon closing of this transaction. The closing of the transaction contemplated by the Purchase Agreement, which is subject to the satisfaction of certain customary conditions, is expected to occur by the end of the second quarter of fiscal 2015.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Apr. 30, 2014
Accounting Policies [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 Flash Memory 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. These systems’ embedded software function together with the hardware to deliver their essential functionality. The Company also recently introduced the Violin Symphony Management Software Suite and Maestro Memory Services Software Suite as software offerings enhancing the process to manage, monitor and protect application data in the enterprise data center. 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 present 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, 2014, filed with the SEC on April 16, 2014. The results of operations for the three months ended April 30, 2014 are not necessarily indicative of the results to be expected for any subsequent interim period, the year ended January 31, 2015 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 the respective period.
	Gains and losses from foreign currency transactions are included in other income (expense), 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 in its provision for doubtful accounts. Actual results could differ from those estimates.
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, 2014 filed with the SEC on April 16, 2014. 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
	In March 2013, the FASB issued an accounting standard update requiring an entity to release into net income the entire amount of a cumulative translation adjustment related to its investment in a foreign entity when as a parent it either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets within a foreign entity. This accounting standard update was effective prospectively for the Company beginning in the first quarter of fiscal 2015. The adoption of this accounting standard update did not have a material impact on the Company’s condensed consolidated financial statements.
	In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carry-forward, a Similar Tax Loss, or a Tax Credit Carry-forward Exists, which is effective for the periods beginning after December 15, 2013. The new guidance provides that a liability related to an unrecognized tax benefit would be presented as a reduction of a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. The new guidance became effective for the Company on February 1, 2014, and was applied prospectively to unrecognized tax benefits that existed at the effective date. The adoption of this new guidance did not have a material impact on the Company’s condensed consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, a converged standard on revenue recognition. The new pronouncement requires revenue recognition to depict the transfer of promised goods or services to customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also specifies the accounting for some costs to obtain or fulfil a contract with a customer, as well as enhanced disclosure requirements. ASU 2014-9 is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting periods. Early adoption is not permitted. The Company is currently in the process of evaluating the impact of the adoption will have on its consolidated financial statements.

Cash_Equivalents_and_ShortTerm1

Cash Equivalents and Short-Term Investments (Tables)	3 Months Ended
	Apr. 30, 2014
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):
		April 30, 2014
		Amortized		Unrealized		Unrealized			Estimated Fair
		Cost		Gains		Losses			Value
	Money market funds	$	37	$	—	$	—		$	37
	Commercial paper		19,848		—		—			19,848
	Corporate debt securities		11,918		4		(2	)		11,920
	U.S. government and agency obligations		9,553		4		(1	)		9,556
	Municipal obligations		13,690		6		—			13,696
	Total investments	$	55,046	$	14	$	(3	)	$	55,057
	Reported as:
	Cash equivalents	$	15,955	$	—	$	—		$	15,955
	Short-term investments		39,091		14		(3	)		39,102
	Total investments	$	55,046	$	14	$	(3	)	$	55,057
		January 31, 2014
		Amortized		Unrealized		Unrealized			Estimated Fair
		Cost		Gains		Losses			Value
	Money Market funds	$	15,229	$	—	$	—		$	15,229
	Commercial paper		19,097		—		—			19,097
	Corporate debt securities		8,134		4		(3	)		8,135
	U.S. government and agency obligations		29,130		5		(3	)		29,132
	Municipal obligations		18,434		8		—			18,442
		$	90,024	$	17	$	(6	)	$	90,035
	Reported as:
	Cash equivalents	$	30,929	$	—	$	—		$	30,929
	Short-term investments		59,095		17		(6	)		59,106
	Total investments	$	90,024	$	17	$	(6	)	$	90,035
Amortized Cost and Fair Value of Investments	'
	The amortized cost and fair value of investments held as of April 30, 2014, by contractual years-to-maturity, are as follows (in thousands):
		Amortized		Fair
		Cost		Value
	Due within one year	$	46,367	$	46,374
	Due within one to two years		8,679		8,683
		$	55,046	$	55,057

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Apr. 30, 2014
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):
		April 30, 2014
		Level 1		Level 2		Level 3		Total
	Money market funds	$	37	$	—	$	—	$	37
	Corporate debt securities		—		11,920		—		11,920
	U.S. government and agency obligations		—		9,556		—		9,556
	Municipal obligations		—		13,696		—		13,696
	Commercial paper		—		19,848		—		19,848
		$	37	$	55,020	$	—	$	55,057
		January 31, 2014
		Level 1		Level 2		Level 3		Total
	Money market funds	$	15,229	$	—	$	—	$	15,229
	Corporate debt securities		—		8,135		—		8,135
	U.S. government and agency obligations		—		29,132		—		29,132
	Municipal obligations		—		18,442		—		18,442
	Commercial paper		—		19,097		—		19,097
		$	15,229	$	74,806	$	—	$	90,035

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	3 Months Ended
	Apr. 30, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Schedule of Components of Accounts Receivable	'
	The following table shows the components of accounts receivable, net (in thousands):
			April 30,			January 31,
			2014			2014
	Accounts receivable		$	15,384		$	21,248
	Reserve for sales returns and allowances			(193	)		(193	)
			$	15,191		$	21,055
Schedule of Inventory Components	'
	The following table shows the components of inventory (in thousands):
			April 30, 2014			January 31, 2014
	Raw materials		$	19,223		$	15,326
	Finished goods			18,975			24,327
			$	38,198		$	39,653
Schedule of Components of Property and Equipment	'
	The following table shows the components of property and equipment (in thousands):
			April 30,			January 31,
			2014			2014
	Laboratory equipment		$	24,078		$	22,854
	Computer hardware and software			12,479			11,440
	Office furniture			305			305
	Leasehold improvements			310			310
				37,172			34,909
	Less: accumulated depreciation			(23,670	)		(21,256	)
			$	13,502		$	13,653
Schedule of Components of Accrued Liabilities	'
	The following table shows the components of accrued liabilities (in thousands):
			April 30, 2014			January 31, 2014
	Compensation and benefits		$	8,514		$	10,805	*
	Customer advance from Toshiba (Note 10)			5,848			6,875
	Accrued vendor payables			6,890			6,661
	Restructuring and transition charges			2,294			3,248
	Professional fees			3,100			4,635	*
	Warranty			1,324			1,223
	Other			3,411			3,868	*
			$	31,381		$	37,315
	*	Reflects the reclassification of certain amounts within total accrued liabilities as of January 31, 2014 from other accrued liabilities to compensation and benefits and professional fees.
Schedule of Reconciliation of Aggregate Product Warranty Liability	'
	The following table is a reconciliation of the changes in the Company’s aggregate product warranty liability (in thousands):
			Three Months Ended April 30,
			2014			2013
	Balance, beginning of period		$	1,223		$	994
	Additions			474			436
	Settlements			(373	)		(231	)
	Balance, end of period		$	1,324		$	1,199
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The components of accumulated other comprehensive income (loss) as of April 30, 2014 and January 31, 2014, net of tax, were as follows (in thousands):
			Foreign			Net			Total
			Currency			Unrealized
			Translation			Gain (Loss)
			Adjustments			on Short
						Term
						Investments
	Accumulated other comprehensive income as of January 31, 2014		$	104		$	11		$	115
	Other comprehensive loss, net of tax			(111	)		—			(111	)
	Accumulated other comprehensive income (loss) as of April 30, 2014		$	(7	)	$	11		$	4

Equity_Award_and_Employee_Comp1

Equity Award and Employee Compensation Plans (Tables)	3 Months Ended
	Apr. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [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
			Available			Options			Average		Remaining		Intrinsic
			for Grant						Exercise Price		Contractual Life		Value (1)
											(in years)
	Balances, January 31, 2014			5,459			5,230		$	1.43		7.23	$	19,770
	Additional shares authorized (2)			10,400
	RSUs granted			(942	)		—			—
	Recovery of shares from RSU net settlement			763			—			—
	RSUs cancelled/forfeited			1,670			—			—
	Options granted (2)			(8,439	)		8,439			4
	Options exercised						(1,216	)		1.02
	Options forfeited			147			(147	)		2.86
	Balances, April 30, 2014			9,058			12,306		$	3.22		7.92	$	44,302
	Options vested and expected to vest – April 30, 2014						12,109		$	3.22		7.94	$	43,592
	Options exercisable – April 30, 2014						3,292		$	1.21		7.27	$	11,851
	-1	Aggregate intrinsic value is based on the common stock price at each respective date presented.
	-2	Includes 4,150,000 shares added to the 2012 Plan and 6,250,000 shares related to options issued under Inducement Grant Stock Option Agreements.
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
			of RSUs			Average			Intrinsic
						Grant Date			Value (1)
						Fair Value
	Balance, January 31, 2014			15,077		$	6.09		$	56,990
	RSUs granted			942			4.22
	RSUs vested			(4,393	)		4.21
	RSUs cancelled/forfeited			(1,670	)		5.88
	Balance, April 30, 2014			9,956		$	5.72		$	35,840
	-1	Aggregate intrinsic value is based on the common stock price at each respective date presented.

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Apr. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Schedule of Assumptions to Estimate Fair Value of Options and Purchase Rights under ESPP	'
	The Company uses the Black-Scholes option pricing model to estimate the fair value of options and purchase rights under the ESPP. This model requires the input of highly subjective assumptions including the expected term of the option, expected stock price volatility, dividend yield and risk-free interest rate. The Company used the following assumptions:
	Stock options	Three Months Ended
		April 30, 2014
	Expected life of options (in years)	5.15
	Expected volatility	47.70%
	Risk-free interest rate	1.50%
	Dividend yield	0%
	Stock based compensation associated with non-employee awards was approximately $0.2 million and $0.3 million for the quarters ended April 30, 2014 and 2013, respectively.
	Employee stock purchase plan	Three Months Ended
		April 30, 2014
	Expected life of options (in years)	2.18
	Expected volatility	45.60%
	Risk-free interest rate	0.12%
	Dividend yield	0%

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Apr. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Future Minimum Lease Payments under Operating Leases	'
	Future minimum lease payments under the Company’s operating leases as of April 30, 2014, are as follows (in thousands):
	Years ending January 31:
	2015 (remaining)	$	2,255
	2016		3,638
	2017		3,515
	2018		294
		$	9,702

Restructuring_and_Transition_C1

Restructuring and Transition Charges (Tables)	3 Months Ended
	Apr. 30, 2014
Restructuring And Related Activities [Abstract]	'
Information Related to Restructuring and Transition Related Activities	'
	Information related to the Company's restructuring and transition related activities for the three months ended April 30, 2014 is as follows (in thousands):
		Severance			Excess Facility			Other Charges			Total
		and related			charges
		charges
	Balance January 31, 2014	$	2,371		$	511		$	366		$	3,248
	Restructuring provision		858			834			64			1,756
	Payments		(2,148	)		(145	)		(417	)		(2,710	)
	Balance April 30, 2014	$	1,081		$	1,200		$	13		$	2,294

Segment_Information_and_Custom1

Segment Information and Customer Concentration (Tables)	3 Months Ended
	Apr. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Revenue and Property and Equipment by Geographic Area	'
	Revenue by geography is based on the billing address of the customer. The following table sets forth revenue and property and equipment by geographic area (in thousands):
		Three Months Ended April 30,
		2014		2013
	Revenue:
	Americas:
	United States	$	9,501	$	17,507
	Other Americas		297		14
			9,798		17,521
	Europe:
	United Kingdom		1,082		629
	Other Europe		3,493		2,123
			4,575		2,752
	Asia Pacific:		3,760		4,525
		$	18,133	$	24,798
		April 30,		January 31,
		2014		2014
	Property and Equipment:
	United States	$	13,129	$	13,232
	Europe		367		415
	Asia Pacific		6		6
		$	13,502	$	13,653

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	3 Months Ended
	Apr. 30, 2014
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
		April 30,
		2014			2013
	Numerator:
	Net loss	$	(30,143	)	$	(28,524	)
	Denominator:
	Weighted average common shares outstanding		86,003			15,645
	Less: Weighted average unvested common shares subject to repurchase		52			287
	Weighted average shares used to compute net loss per share of common stock, basic and diluted		85,951			15,358
	Net loss per share of common stock, basic and diluted	$	(0.35	)	$	(1.86	)
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 been anti-dilutive for the periods presented (in thousands):
		Three Months Ended April 30,
		2014			2013
	Convertible preferred stock (on an as converted basis)		—			23,536
	Common stock subject to repurchase		34			219
	Warrants related to common stock		84			—
	Shares subject to outstanding common stock options and restricted stock units		22,262			16,162
			22,380			39,917

Cash_Equivalents_and_ShortTerm2

Cash Equivalents and Short-Term Investments - Cash Equivalents and Short-Term Investments by Type of Instrument (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	$55,046	$90,024
Unrealized Gains	14	17
Unrealized Losses	-3	-6
Estimated Fair Value	55,057	90,035
Money Market Funds [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	37	15,229
Unrealized Gains	'	'
Unrealized Losses	'	'
Estimated Fair Value	37	15,229
Commercial Paper [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	19,848	19,097
Unrealized Gains	'	'
Unrealized Losses	'	'
Estimated Fair Value	19,848	19,097
Corporate Debt Securities [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	11,918	8,134
Unrealized Gains	4	4
Unrealized Losses	-2	-3
Estimated Fair Value	11,920	8,135
U.S. Government and Agency Obligations [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	9,553	29,130
Unrealized Gains	4	5
Unrealized Losses	-1	-3
Estimated Fair Value	9,556	29,132
Municipal Obligations [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	13,690	18,434
Unrealized Gains	6	8
Unrealized Losses	'	'
Estimated Fair Value	13,696	18,442
Cash Equivalents [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	15,955	30,929
Unrealized Gains	'	'
Unrealized Losses	'	'
Estimated Fair Value	15,955	30,929
Short-term Investments [Member]	'	'
Cash and Cash Equivalents [Line Items]	'	'
Amortized Cost	39,091	59,095
Unrealized Gains	14	17
Unrealized Losses	-3	-6
Estimated Fair Value	$39,102	$59,106

Cash_Equivalents_and_ShortTerm3

Cash Equivalents and Short-Term Investments - Amortized Cost and Fair Value of Investments (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Cash And Cash Equivalents [Abstract]	'	'
Amortized Cost, Due within one year	$46,367	'
Amortized Cost, Due within one to two years	8,679	'
Amortized Cost	55,046	90,024
Fair Value, Due within one year	46,374	'
Fair Value, Due within one to two years	8,683	'
Fair Value	$55,057	$90,035

Cash_Equivalents_and_ShortTerm4

Cash Equivalents and Short-Term Investments - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014
Cash And Cash Equivalents [Abstract]	'	'
Accrued interest related to purchased investments	$0.30	$0.30

Fair_Value_Measurements_Summar

Fair Value Measurements - Summary of Fair Value of Financial Assets and Liabilities (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	$55,057	$90,035
Corporate Debt Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	11,920	8,135
U.S. Government and Agency Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	9,556	29,132
Municipal Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	13,696	18,442
Money Market Funds [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	37	15,229
Commercial Paper [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	19,848	19,097
Level 1 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	37	15,229
Level 1 [Member] | Corporate Debt Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 1 [Member] | U.S. Government and Agency Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 1 [Member] | Municipal Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 1 [Member] | Money Market Funds [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	37	15,229
Level 1 [Member] | Commercial Paper [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 2 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	55,020	74,806
Level 2 [Member] | Corporate Debt Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	11,920	8,135
Level 2 [Member] | U.S. Government and Agency Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	9,556	29,132
Level 2 [Member] | Municipal Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	13,696	18,442
Level 2 [Member] | Money Market Funds [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 2 [Member] | Commercial Paper [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	19,848	19,097
Level 3 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 3 [Member] | Corporate Debt Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 3 [Member] | U.S. Government and Agency Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 3 [Member] | Municipal Obligations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 3 [Member] | Money Market Funds [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'
Level 3 [Member] | Commercial Paper [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Total assets measured at fair value	'	'

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Accrued interest related to purchased investments	$0.30	$0.30
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

Balance_Sheet_Components_Sched

Balance Sheet Components - Schedule of Components of Accounts Receivable (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Receivables [Abstract]	'	'
Accounts receivable	$15,384	$21,248
Reserve for sales returns and allowances	-193	-193
Accounts receivable, net	$15,191	$21,055

Balance_Sheet_Components_Sched1

Balance Sheet Components - Schedule of Inventory Components (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$19,223	$15,326
Finished goods	18,975	24,327
Inventory	$38,198	$39,653

Balance_Sheet_Components_Sched2

Balance Sheet Components - Schedule of Components of Property and Equipment (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$37,172	$34,909
Less: accumulated depreciation	-23,670	-21,256
Property and Equipment, net	13,502	13,653
Laboratory Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	24,078	22,854
Computer Hardware and Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	12,479	11,440
Office Furniture [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	305	305
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$310	$310

Balance_Sheet_Components_Addit

Balance Sheet Components - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Jan. 31, 2014
Balance Sheet Components [Abstract]	'	'	'
Depreciation expense	$3,000,000	$2,500,000	'
Reclassifications out of accumulated other comprehensive income (loss)	0	'	0
Other-than-temporary impairment on available-for-sale securities recognized	$0	'	'

Balance_Sheet_Components_Sched3

Balance Sheet Components - Schedule of Components of Accrued Liabilities (Detail) (USD $)	Apr. 30, 2014	Jan. 31, 2014	Apr. 30, 2013	Jan. 31, 2013
In Thousands, unless otherwise specified
Payables And Accruals [Abstract]	'	'	'	'
Compensation and benefits	$8,514	$10,805	'	'
Customer advance from Toshiba (Note 10)	5,848	6,875	'	'
Accrued vendor payables	6,890	6,661	'	'
Restructuring and transition charges	2,294	3,248	'	'
Professional fees	3,100	4,635	'	'
Warranty	1,324	1,223	1,199	994
Other	3,411	3,868	'	'
Accrued liabilities	$31,381	$37,315	'	'

Balance_Sheet_Components_Sched4

Balance Sheet Components - Schedule of Reconciliation of Aggregate Product Warranty Liability (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Payables And Accruals [Abstract]	'	'
Balance, beginning of period	$1,223	$994
Additions	474	436
Settlements	-373	-231
Balance, end of period	$1,324	$1,199

Balance_Sheet_Components_Sched5

Balance Sheet Components - Schedule of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated other comprehensive income, beginning balance	$115
Other comprehensive loss, net of tax	-111
Accumulated other comprehensive income (loss), ending balance	4
Foreign Currency Translation Adjustments [Member]	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated other comprehensive income, beginning balance	104
Other comprehensive loss, net of tax	-111
Accumulated other comprehensive income (loss), ending balance	-7
Net Unrealized Gain (Loss) on Short Term Investments [Member]	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated other comprehensive income, beginning balance	11
Other comprehensive loss, net of tax	'
Accumulated other comprehensive income (loss), ending balance	$11

Equity_Award_and_Employee_Comp2

Equity Award and Employee Compensation Plans - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

3 Months Ended

In Millions, except Share data, unless otherwise specified

Apr. 30, 2014

Jan. 31, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2014

Apr. 30, 2013

Employee 401(k) Plan [Member]

2012 Stock Plan [Member]

Inducement Grant Stock Option Agreements [Member]

Employee Stock Purchase Plan [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Non-Employee Options [Member]

Non-Employee Options [Member]

Period

2012 Stock Plan [Member]

2012 Stock Plan [Member]

Employee Stock Purchase Plan [Member]

Minimum [Member]

Maximum [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

'

'

'

'

'

'

'3 years

'4 years

'

'

'

'

'

'

Percentage of stock appreciation rights granted

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

Shares outstanding

12,306,000

5,230,000

'

9,088,950

'

'

'

'

'

'

'

'

'

'

Shares authorized

'

7,500,000

'

11,650,000

'

1,600,000

'

'

'

'

'

'

'

'

Increase in shares authorized reserve, description

'

'

'

'The reserve will automatically increase on the first day of each fiscal year beginning on February 1, 2014 in an amount equal to the lesser of (i) 5% of the outstanding shares of common stock on the last day of the immediately preceding fiscal year, or (ii) another amount determined by the Board of Directors.

'

'

'

'

'

'

'

'

'

'

Increased share reserve

'

'

'

4,150,000

'

600,000

'

'

'

'

'

'

'

'

Shares related to options issued

'

'

'

4,150,000

6,250,000

'

'

'

'

'

'

'

'

'

Weighted average grant date fair value of options granted

$1.73

'

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of options exercised

$3.80

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock units vesting period

'

'

'

'

'

'

'

'

'

'

'3 years

'4 years

'

'

Restricted stock units expected to vest

12,109,000

'

'

'

'

'

'

'

'

18,600,000

'

'

'

'

RSUs vested

4,393,000

'

'

'

'

'

'

'

'

3,700,000

'

'

'

'

Restricted stock units withheld to cover the required withholding tax

'

'

'

'

'

'

'

'

'

763,000

'

'

'

'

Share based compensation, Company granted option to purchase common stock

'

'

'

'

'

'

'

'

'

'

'

'

309,000

5,000

Share based compensation, Company granted option to purchase restricted stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan, shares have been reserved for issuance under the 2012 Purchase Plan

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan, Increase in number of shares available for issuance under the 2012 Purchase Plan

'

'

'

'

'

0.75%

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan, maximum percentage of annual salary that an employee is permitted to utilize

'

'

'

'

'

15.00%

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan, number Of Offering Periods

'

'

'

'

'

2

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan, duration of offering period

'

'

'

'

'

'

'

'

'27 months

'

'

'

'

'

Employee Stock Purchase Plan, frequency of purchase date

'

'

'

'

'

'

'

'

'6 months

'

'

'

'

'

Employee Stock Purchase Plan, price of each shares issued is lower of the fair value per share of common stock

'

'

'

'

'

85.00%

'

'

'

'

'

'

'

'

Employee compensation plan, percentage of maximum contribution by employees

'

'

90.00%

'

'

'

'

'

'

'

'

'

'

'

Equity_Award_and_Employee_Comp3

Equity Award and Employee Compensation Plans - Summary of Stock Option Activity (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares Available for Grant, Beginning balance	5,459,000	'
Number of Options, RSUs granted	-942,000	'
Number of Options, RSUs cancelled/forfeited	1,670,000	'
Number of Options, Options granted	8,439,000	'
Number of Options, Options exercised	-1,216,000	'
Shares Available for Grant, Ending balance	9,058,000	5,459,000
Number of Options, Beginning balance	5,230,000	'
Number of Options, Additional shares authorized	'	7,500,000
Number of Options, Options forfeited	-147,000	'
Number of Options, Ending balance	12,306,000	5,230,000
Number of Options, Options vested and expected to vest	12,109,000	'
Number of Options, Options exercisable	3,292,000	'
Weighted-Average Exercise Price, Beginning balance	$1.43	'
Weighted-Average Exercise Price, Options granted	$4	'
Weighted-Average Exercise Price, Options exercised	$1.02	'
Weighted-Average Exercise Price, Options forfeited	$2.86	'
Weighted-Average Exercise Price, Ending balance	$3.22	$1.43
Weighted-Average Exercise Price, Options vested and expected to vest	$3.22	'
Weighted-Average Exercise Price, Options exercisable	$1.21	'
Weighted-Average Remaining Contractual Life (in years)	'7 years 11 months 1 day	'7 years 2 months 23 days
Weighted-Average Remaining Contractual Life (in years), Options vested and expected to vest	'7 years 11 months 9 days	'
Weighted-Average Remaining Contractual Life (in years), Options exercisable	'7 years 3 months 7 days	'
Aggregate Intrinsic Value, Beginning balance	$19,770	'
Aggregate Intrinsic Value, Ending balance	44,302	19,770
Aggregate Intrinsic Value, Options vested and expected to vest	43,592	'
Aggregate Intrinsic Value, Options exercisable	$11,851	'
Shares Available for Grant [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares Available for Grant, Additional shares authorized	10,400,000	'
Number of Options, Options granted	-8,439,000	'
Shares Available for Grant, Options forfeited	147,000	'
Restricted Stock Units (RSUs) [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of Options, RSUs granted	'	'
Number of Options, RSUs cancelled/forfeited	'	'
Number of Options, Recovery of shares from RSU net settlement	'	'
Number of Options, Options vested and expected to vest	18,600,000	'
Restricted Stock Units (RSUs) [Member] | Shares Available for Grant [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of Options, RSUs granted	-942,000	'
Shares Available for Grant, Recovery of shares from RSU net settlement	763,000	'
Number of Options, RSUs cancelled/forfeited	1,670,000	'

Equity_Award_and_Employee_Comp4

Equity Award and Employee Compensation Plans - Summary of Stock Option Activity (Parenthetical) (Detail)	Apr. 30, 2014
2012 Stock Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Shares related to options issued	4,150,000
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

Equity_Award_and_Employee_Comp5

Equity Award and Employee Compensation Plans - Summary of Restricted Stock Units Activity (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Number of RSUs, Beginning balance	15,077	'
Number of RSUs, granted	942	'
Number of RSUs, vested	-4,393	'
Number of RSUs, cancelled/forfeited	-1,670	'
Number of RSUs, Ending balance	9,956	'
Weighted-Average Grant Date Fair Value, Beginning balance	$6.09	'
Weighted-Average Grant Date Fair Value, granted	$4.22	'
Weighted-Average Grant Date Fair Value, vested	$4.21	'
Weighted-Average Grant Date Fair Value, cancelled/forfeited	$5.88	'
Weighted-Average Grant Date Fair Value, Ending balance	$5.72	'
Aggregate Intrinsic Value	$35,840	$56,990

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Stock-based compensation not yet recognized	$42.20	'
Stock-based compensation not yet recognized, expects to amortize based upon equity awards outstanding in remainder of fiscal 2015	14.1	'
Stock-based compensation not yet recognized, expects to amortize based upon equity awards outstanding in fiscal 2016	16.1	'
Stock-based compensation not yet recognized, expects to amortize based upon equity awards outstanding in fiscal 2017	8.6	'
Stock-based compensation not yet recognized, expects to amortize based upon equity awards outstanding in fiscal 2018	3.2	'
Stock-based compensation not yet recognized, expects to amortize based upon equity awards outstanding in fiscal 2019	0.2	'
Capitalized stock-based compensation expense	0	'
Stock based compensation of non-employee awards	0.2	0.3
Non-Employees [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Additional share-based compensation expense	$2	'

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Assumptions to Estimate Fair Value of Options and Purchase Rights under ESPP (Detail)	3 Months Ended
	Apr. 30, 2014
Employee Stock Purchase Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Expected life of options (in years)	'2 years 2 months 5 days
Expected volatility	45.60%
Risk-free interest rate	0.12%
Dividend yield	0.00%
Employee Stock Options [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Expected life of options (in years)	'5 years 1 month 24 days
Expected volatility	47.70%
Risk-free interest rate	1.50%
Dividend yield	0.00%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Income tax expense	$6	$20
Unrecognized tax benefits	$0	'

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended				0 Months Ended
	Nov. 26, 2013	Apr. 30, 2014	Jul. 31, 2013	Jul. 31, 2012	Apr. 30, 2014	Aug. 26, 2013	Apr. 30, 2014	Jan. 31, 2014	Apr. 30, 2014	Apr. 30, 2014
	Lawsuits	Milestone			Amendment of the Agreement [Member]	Savvian Litigation [Member]	Indemnification Agreement [Member]	Indemnification Agreement [Member]	Software Vendor [Member]	Other Software Vendor [Member]
Loss Contingencies [Line Items]	'	'	'	'	'	'	'	'	'	'
Offering fees, payment sought	'	'	'	'	'	$10,000,000	'	'	'	'
Number of lawsuits filed	4	'	'	'	'	'	'	'	'	'
Class action filing date	'	26-Nov-13	'	'	'	'	'	'	'	'
Liabilities recorded for indemnification agreements	'	'	'	'	'	'	0	0	'	'
Outstanding purchase commitments	'	6,900,000	'	'	'	'	'	'	'	'
Purchase commitments obligations	'	'	12,000,000	5,000,000	'	'	'	'	'	'
Remaining purchase commitment	'	'	'	'	'	'	'	'	6,000,000	3,900,000
Number of milestones completed	'	0	'	'	'	'	'	'	'	'
Advertising Commitment description	'	'In June 2012, the Company entered into an agreement with the Forty Niners SC Stadium Company LLC, or the Team. As part of this agreement, the Company will receive advertising and related benefits at the stadium under construction in Santa Clara, California from 2014 through 2023. Under the agreement, the Company was committed to make payments to the Team of $4.0 million per year beginning in fiscal 2015 and for nine years thereafter.	'	'	'	'	'	'	'	'
Advertising commitment	'	4,000,000	'	'	1,750,000	'	'	'	'	'
Payment commitment period	'	'Beginning in fiscal 2015 and for nine years thereafter.	'	'	'	'	'	'	'	'
Advertising commitment agreement term	'	'10 years	'	'	'	'	'	'	'	'
Advertising commitment first year's payments amount	'	1,250,000	'	'	'	'	'	'	'	'
Adverting commitment first payment date	'	5-Nov-14	'	'	'	'	'	'	'	'
Advertising expenses recognized	'	$0	'	'	'	'	'	'	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments under Operating Leases (Detail) (USD $)	Apr. 30, 2014
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
2015	$2,255
2016	3,638
2017	3,515
2018	294
Total	$9,702

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)

Apr. 30, 2014

Jan. 31, 2014

Jul. 31, 2013

Apr. 30, 2014

Jun. 30, 2011

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2014

Apr. 30, 2013

Jul. 31, 2013

Jan. 31, 2014

Jul. 31, 2013

Jan. 31, 2014

Share data in Thousands, unless otherwise specified

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Toshiba Corporation [Member]

Flash Memory [Member]

Flash Memory Array and services[Member]

Flash Memory Array and services[Member]

NAND Flash Memory [Member]

NAND Flash Memory [Member]

Development of PCIe Cards [Member]

Development of PCIe Cards [Member]

Sample PCIe Cards [Member]

Sample PCIe Cards [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock outstanding

87,747

83,057

'

9,200

'

'

'

'

'

'

'

'

'

Percentage of common stock outstanding

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

Sales agreement purchase percentage

'

'

'

'

70.00%

'

'

'

'

'

'

'

'

Purchases from related party

'

'

'

'

'

'

'

$5,600,000

$7,300,000

'

'

'

'

Revenue recognized from related party

'

'

'

1,000,000

'

500,000

1,700,000

'

'

'

'

'

'

Prepayment received from related party

'

'

16,000,000

'

'

'

'

'

'

8,000,000

'

8,000,000

'

Revenue recognized related to development

'

'

'

'

'

'

'

'

'

'

6,000,000

'

3,200,000

Remaining agreement value composed of prepaid development services and sample cards

$11,370,000

$12,208,000

'

$5,800,000

'

'

'

'

'

'

'

'

'

Termination date of agreement

'

'

'

'2014-05

'

'

'

'

'

'

'

'

'

Restructuring_and_Transition_C2

Restructuring and Transition Charges - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2014
Reorganizations [Abstract]	'
Incurred restructuring and transition charges	$6.60

Restructuring_and_Transition_C3

Restructuring and Transition Charges - Information Related to Restructuring and Transition Related Activities (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014
Restructuring Cost and Reserve [Line Items]	'
Restructuring and transition charges, beginning balance	$3,248
Restructuring provision	1,756
Payments	-2,710
Restructuring and transition charges, ending balance	2,294
Severance and Related Charges [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring and transition charges, beginning balance	2,371
Restructuring provision	858
Payments	-2,148
Restructuring and transition charges, ending balance	1,081
Excess Facility Charges [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring and transition charges, beginning balance	511
Restructuring provision	834
Payments	-145
Restructuring and transition charges, ending balance	1,200
Other Charges [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring and transition charges, beginning balance	366
Restructuring provision	64
Payments	-417
Restructuring and transition charges, ending balance	$13

Segment_Information_and_Custom2

Segment Information and Customer Concentration - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Jan. 31, 2014
	Customer	Customer	Customer
	Segment
Segment Reporting Information [Line Items]	'	'	'
Number of reportable segment	1	'	'
Number of operating segment	1	'	'
Number of single customer accounted for accounts receivable	0	0	'
Number of single customer accounted for accounts receivable	0	'	0
Largest Customers [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Number of single customer accounted for accounts receivable	5	5	'
Net Revenue [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	'	10.00%	'
Net Revenue [Member] | Avnet, Inc. [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	'	24.00%	'
Net Revenue [Member] | Largest Customers [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	36.00%	48.00%	'
Accounts Receivable [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	'	'	10.00%
Accounts Receivable [Member] | Avnet, Inc. [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	'	'	15.00%
Accounts Receivable [Member] | Commtech Innovative Solutions [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	'	'	27.00%
Minimum [Member] | Net Revenue [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	10.00%	'	'
Minimum [Member] | Accounts Receivable [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Percentage of customers represented	10.00%	'	'

Segment_Information_and_Custom3

Segment Information and Customer Concentration - Schedule of Revenue and Property and Equipment by Geographic Area (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Jan. 31, 2014
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	$18,133	$24,798	'
Property and equipment, net	13,502	'	13,653
United States [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	9,501	17,507	'
Property and equipment, net	13,129	'	13,232
Other Americas [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	297	14	'
Americas [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	9,798	17,521	'
United Kingdom [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	1,082	629	'
Other Europe [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	3,493	2,123	'
Europe [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	4,575	2,752	'
Property and equipment, net	367	'	415
Asia Pacific [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total Revenue	3,760	4,525	'
Property and equipment, net	$6	'	$6

Net_Loss_Per_Share_Schedule_of

Net Loss Per Share - Schedule of Computation of Historical Basic and Diluted Net Loss Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Numerator:	'	'
Net loss	($30,143)	($28,524)
Denominator:	'	'
Weighted average common shares outstanding	86,003	15,645
Less: Weighted average unvested common shares subject to repurchase	52	287
Weighted average shares used to compute net loss per share of common stock, basic and diluted	85,951	15,358
Net loss per share of common stock, basic and diluted	($0.35)	($1.86)

Net_Loss_Per_Share_Schedule_of1

Net Loss Per Share - Schedule of Common Stock Equivalents Excluded from Computation of Diluted Net Loss Per Share (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total common stock equivalents excluded from computation of diluted net loss per share	22,380	39,917
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	34	219
Warrants Related to Common 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	84	'
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	22,262	16,162
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	'	23,536

Debt_and_Line_of_Credit_Additi

Debt and Line of Credit - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended			3 Months Ended		3 Months Ended
	31-May-14	Apr. 30, 2014	Apr. 30, 2014	31-May-13	Apr. 30, 2014	Apr. 30, 2014	Apr. 30, 2014
	Subsequent Events [Member]	Line of Credit [Member]	TriplePoint Capital, LLC [Member]	TriplePoint Capital, LLC [Member]	Minimum [Member]	Maximum [Member]	Maximum [Member]
			Secured Debt [Member]	Secured Debt [Member]	TriplePoint Capital, LLC [Member]	Line of Credit [Member]	TriplePoint Capital, LLC [Member]
					Secured Debt [Member]		Secured Debt [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'
Debt facility, maximum borrowing capacity	'	$7,500,000	'	$50,000,000	'	'	'
Debt facility, collateral description	'	'	'The facility had first secured interest in substantially all of the Company's assets and intellectual property other than $7.5 million of accounts receivable.	'	'	'	'
Debt facility period	'	'	'1 year	'	'	'	'
Borrowing options, expiration period	'	'2 years	'	'	'3 months	'	'5 years
Debt instrument, interest rate, minimum	'	'	7.00%	'	'	'	'
Debt instrument, interest rate, maximum	'	'	13.50%	'	'	'	'
Debt instrument, interest rate at period end	'	'	'	'	0.50%	'	14.00%
Debt instrument, outstanding	'	'	0	'	'	'	'
Expiration date of the loan agreement terminated	12-May-14	'	'	'	'	'	'
Line of credit, borrowing capacity description	'	'The Company can borrow up to 80% of its current U.S.-based receivables, or $7.5 million, whichever is lower.	'	'	'	'	'
Percentage of receivable	'	'	'	'	'	80.00%	'
Line of credit facility, interest rate spread	'	1.00%	'	'	'	'	'
Line of credit facility, interest rate at period end	'	4.25%	'	'	'	'	'
Line of credit facility, expiration date	'	31-Jul-15	'	'	'	'	'
Line of credit facility, amount outstanding	'	$7,500,000	'	'	'	'	'

Subsequent_events_Addition_Inf

Subsequent events - Addition Information (Detail) (USD $)	3 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2015	Apr. 30, 2014	Apr. 30, 2014	29-May-14
	Scenario, Forecast [Member]	Toshiba Corporation [Member]	TriplePoint Capital, LLC [Member]	Subsequent Events [Member]
Subsequent Event [Line Items]	'	'	'	'
Termination date of agreement	'	'2014-05	'2014-05	'
Asset purchase agreement cash consideration	'	'	'	$23
Employee-related liabilities	'	'	'	0.5
Purchase price held in escrow	'	'	'	2.3
Percentage of purchase price held in escrow	'	'	'	10.00%
Period of purchase price held in escrow	'	'	'	'12 months
Transaction closing fees and expenses	$4	'	'	'