Quantum (QMCO) 10-Q 6 Feb 15 2015 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Dec. 31, 2014	Jan. 31, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	QUANTUM CORP /DE/
Entity Central Index Key	709283
Current Fiscal Year End Date	-28
Entity Filer Category	Accelerated Filer
Trading Symbol	QTM
Document Type	10-Q
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q3
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		256,388,447

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$106,983	$99,125
Restricted cash	2,677	2,760
Accounts receivable, net of allowance for doubtful accounts of $235 and $88, respectively	110,628	101,605
Manufacturing inventories	38,298	34,815
Service parts inventories	24,361	25,629
Other current assets	10,174	10,161
Total current assets	293,121	274,095
Long-term assets:
Property and equipment, less accumulated depreciation	15,292	17,574
Intangible assets, less accumulated amortization	891	3,911
Goodwill	55,613	55,613
Other long-term assets	9,030	10,605
Total long-term assets	80,826	87,703
Total Assets	373,947	361,798
Current liabilities:
Accounts payable	51,081	41,792
Accrued warranty	4,788	6,116
Deferred revenue, current	89,973	98,098
Accrued restructuring charges, current	3,136	4,345
Convertible subordinated debt, current	133,735	0
Accrued compensation	31,270	25,036
Other accrued liabilities	13,901	15,168
Total current liabilities	327,884	190,555
Long-term liabilities:
Deferred revenue, long-term	39,251	40,054
Accrued restructuring charges, long-term	3,061	4,023
Convertible subordinated debt, long-term	70,000	203,735
Other long-term liabilities	10,423	10,831
Total long-term liabilities	122,735	258,643
Stockholders' deficit:
Common stock, $0.01 par value; 1,000,000 shares authorized; 256,244 and 250,410 shares issued and outstanding at December 31, 2014 and March 31, 2014, respectively	2,562	2,504
Capital in excess of par	451,992	443,547
Accumulated deficit	-536,216	-540,071
Accumulated other comprehensive income	4,990	6,620
Total stockholders’ deficit	-76,672	-87,400
Total liabilities and stockholders' deficit	$373,947	$361,798

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts of $235 and $88, respectively	$235	$88
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	256,244,000	250,410,000
Common stock, shares outstanding	256,244,000	250,410,000

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Product revenue	$92,166	$98,287	$257,576	$268,892
Service revenue	39,191	36,926	116,848	109,612
Royalty revenue	10,706	10,656	30,873	46,693
Total revenue	142,063	145,869	405,297	425,197
Cost of product revenue	59,772	64,502	170,273	181,167
Cost of service revenue	17,224	19,706	52,502	56,053
Restructuring charges related to cost of revenue	0	288	0	377
Total cost of revenue	76,996	84,496	222,775	237,597
Gross margin	65,067	61,373	182,522	187,600
Operating expenses:
Research and development	13,969	16,010	43,680	49,063
Sales and marketing	27,494	29,424	83,417	89,577
General and administrative	13,815	14,261	42,271	43,745
Restructuring charges	187	1,758	1,676	4,525
Total operating expenses	55,465	61,453	171,044	186,910
Gain on sale of assets	0	0	462	0
Income (loss) from operations	9,602	-80	11,940	690
Other income and expense	125	370	215	791
Interest expense	-2,460	-2,440	-7,360	-7,319
Income (loss) before income taxes	7,267	-2,150	4,795	-5,838
Income tax provision	336	308	940	1,232
Net income (loss)	$6,931	($2,458)	$3,855	($7,070)
Basic net income (loss) per share	$0.03	($0.01)	$0.02	($0.03)
Diluted net income (loss) per share	$0.03	($0.01)	$0.01	($0.03)
Weighted average shares:
Basic	255,860	248,135	253,773	246,183
Diluted	302,855	248,135	257,807	246,183

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$6,931	($2,458)	$3,855	($7,070)
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	-969	59	-2,061	454
Net unrealized gain (loss) on revaluation of long-term intercompany balances	148	-49	431	-211
Total other comprehensive income (loss)	-821	10	-1,630	243
Total comprehensive income (loss)	$6,110	($2,448)	$2,225	($6,827)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income (loss)	$3,855	($7,070)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	6,364	8,217
Amortization of intangible assets	3,537	6,673
Amortization of debt issuance costs	1,246	1,225
Service parts lower of cost or market adjustment	2,690	8,715
Gain on sale of assets	-462	0
Deferred income taxes	-11	86
Share-based compensation	8,655	10,268
Other non-cash	-302	0
Changes in assets and liabilities, net of effect of acquisition:
Accounts receivable	-9,023	-7,443
Manufacturing inventories	-6,145	5,372
Service parts inventories	-686	2,993
Accounts payable	9,325	-8,672
Accrued warranty	-1,328	-1,393
Deferred revenue	-8,928	-1,182
Accrued restructuring charges	-2,197	309
Accrued compensation	6,774	-1,786
Other assets and liabilities	-2,247	-776
Net cash provided by operating activities	11,117	15,536
Cash flows from investing activities:
Purchases of property and equipment	-2,882	-5,026
Proceeds from sale of assets	462	0
Change in restricted cash	-139	517
Purchases of other investments	-22	-534
Return of principal from other investments	104	0
Payment for business acquisition, net of cash acquired	-517	0
Net cash used in investing activities	-2,994	-5,043
Cash flows from investing activities:
Payment of taxes due upon vesting of restricted stock	-2,212	-1,807
Proceeds from issuance of common stock	2,060	2,431
Net cash provided by (used in) financing activities	-152	624
Effect of exchange rate changes on cash and cash equivalents	-113	22
Net increase in cash and cash equivalents	7,858	11,139
Cash and cash equivalents at beginning of period	99,125	68,976
Cash and cash equivalents at end of period	106,983	80,115
Supplemental disclosure of cash flow information:
Purchases of property and equipment included in accounts payable	$90	$514

BASIS_OF_PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION
	Quantum Corporation (“Quantum”, the “Company”, “us” or “we”), is a leading expert in scale-out storage, archive and data protection, providing solutions for capturing, sharing and preserving digital assets over the entire data lifecycle. Our customers, ranging from small businesses to major enterprises, trust us to address their most demanding data workflow challenges. We provide solutions for storing and protecting information in physical, virtual and cloud environments that are designed to help customers Be Certain™ they have an end-to-end storage foundation to maximize the value of their data by making it accessible whenever and wherever needed, retaining it indefinitely and reducing total cost and complexity. We work closely with a broad network of distributors, value-added resellers (“VARs”), direct marketing resellers (“DMRs”), original equipment manufacturers (“OEMs”) and other suppliers to meet customers’ evolving needs. Our stock is traded on the New York Stock Exchange under the symbol QTM.
	The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Quantum and our wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. The interim financial statements reflect all adjustments, consisting of normal recurring adjustments that, in the opinion of management, are necessary for a fair statement of the results for the periods shown. The results of operations for such periods are not necessarily indicative of the results expected for the full fiscal year. The Condensed Consolidated Balance Sheet as of March 31, 2014 has been derived from the audited financial statements at that date, but it does not include all disclosures required by accounting principles generally accepted in the United States for complete financial statements. The accompanying financial statements should be read in conjunction with the audited Consolidated Financial Statements for the fiscal year ended March 31, 2014 included in our Annual Report on Form 10-K, as filed with the Securities and Exchange Commission on June 6, 2014.
	Recently Adopted Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”). ASU 2013-11 requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. ASU 2013-11 does not require new recurring disclosures. ASU 2013-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. We adopted ASU 2013-11 prospectively in the first quarter of fiscal 2015. Adoption did not impact our statements of financial position or results of operations.
	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 requires entities to recognize revenue through the application of a five-step model, which includes identification of the contract, identification of the performance obligations, determination of the transaction price, allocation of the transaction price to the performance obligations and recognition of revenue as the entity satisfies the performance obligations. ASU 2014-09 will become effective for us beginning April 1, 2017, or fiscal 2018. We are currently evaluating the guidance to determine the potential impact on our financial condition, results of operations, cash flows and financial statement disclosures.
	In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern (Topic 205-40): Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern (“ASU 2014-15”). ASU 2014-15 requires that management assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. ASU 2014-15 is effective for annual periods ending after December 15, 2016, and for annual periods and interim periods thereafter. We plan to adopt ASU 2014-15 as of the end of our fiscal year ending March 31, 2017 and do not anticipate adoption will impact our statements of financial position or results of operations.

REVISION_OF_PRIOR_PERIOD_FINAN

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS	9 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS	REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS
	During the fourth quarter of fiscal 2014, we identified an error related to certain allowances recorded for estimated future price adjustments with a cumulative $0.7 million overstatement of revenue and accounts receivable at April 1, 2013. Revenue for both the third quarter and first nine months of fiscal 2014 was overstated by $0.1 million as a result of this error. We also identified an error related to straight-line rent expense that had accumulated since fiscal 2006, resulting in a $2.1 million cumulative overstatement of rent expense and total other accrued liabilities and other long-term liabilities at April 1, 2013. General and administrative expense was overstated by less than $0.1 million for both the third quarter and first nine months of fiscal 2014.
	In the fourth quarter of fiscal 2014, we evaluated these errors in accordance with the Securities and Exchange Commission (“SEC”) Staff Accounting Bulletin No. 99 and determined that the cumulative impact of the errors was not material to our results of operations, financial position or cash flows in our previously issued financial statements and therefore, amendments of previously filed reports are not required. However, if the entire correction of the errors had been recorded during the fourth quarter of fiscal 2014, the impact would have been significant to the Consolidated Statement of Operations for the quarter ended March 31, 2014. As a result, we revised our prior period financial statements in accordance with the SEC's Staff Accounting Bulletin No. 108.
	We believe the revisions are not material to the Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Comprehensive Loss or Condensed Consolidated Statements of Cash Flows for the third quarter or first nine months ended December 31, 2013.

ACQUISITION

ACQUISITION	9 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
ACQUISITION	ACQUISITION
	On July 29, 2014, we acquired a majority of the assets of Symform, Inc., a Washington corporation, for cash of approximately $0.5 million. The assets, consisting primarily of Symform technology, were recorded as purchased technology and are expected to enhance our cloud software capabilities and service offerings for data protection and scale-out storage. This acquisition was recorded as a business combination and the effect was not material to our financial position, results of operations or cash flows.

FAIR_VALUE

FAIR VALUE	9 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE
	Our assets measured and recorded at fair value on a recurring basis consist of money market funds, which are included in cash and cash equivalents in our Condensed Consolidated Balance Sheets, and are valued using quoted market prices (level 1 fair value measurements) at the respective balance sheet dates (in thousands):
		As of
		December 31, 2014		March 31, 2014
	Money market funds	$	65,562	$	93,077
	We did not record impairments to any non-financial assets in the third quarter or first nine months of fiscal 2015 or 2014. We do not have any non-financial liabilities measured and recorded at fair value on a non-recurring basis.
	Our financial liabilities were comprised primarily of convertible subordinated debt at December 31, 2014 and March 31, 2014. The carrying value and fair value based on quoted market prices in less active markets (level 2 fair value measurement) were as follows (in thousands):
		As of
		December 31, 2014				March 31, 2014
		Carrying Value		Fair Value		Carrying Value		Fair Value
	Convertible subordinated debt	$	203,735	$	219,820	$	203,735	$	203,820

INVENTORIES

INVENTORIES	9 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES
	Manufacturing inventories and service parts inventories consisted of the following (in thousands):
		As of
		December 31, 2014		March 31, 2014
	Manufacturing inventories:
	Finished goods	$	21,870	$	18,069
	Work in process	68		1,056
	Materials and purchased parts	16,360		15,690
		$	38,298	$	34,815
		As of
		December 31, 2014		March 31, 2014
	Service parts inventories:
	Finished goods	$	17,663	$	17,926
	Component parts	6,698		7,703
		$	24,361	$	25,629

INTANGIBLE_ASSETS_AND_GOODWILL

INTANGIBLE ASSETS AND GOODWILL	9 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS AND GOODWILL	INTANGIBLE ASSETS AND GOODWILL
	We evaluate our amortizable and indefinite-lived intangible assets (“long-lived assets”) for impairment whenever indicators of impairment exist. We concluded the carrying amount of our long-lived assets was recoverable and there was no impairment in the third quarter or first nine months of fiscal 2015 or 2014. The following provides a summary of the carrying value of intangible assets (in thousands):
		As of
		December 31, 2014							March 31, 2014
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Amount		Amortization			Amount		Amount		Amortization			Amount
	Purchased technology	$	179,992	$	(179,101	)	$	891	$	179,475	$	(178,348	)	$	1,127
	Trademarks	3,900		(3,900		)	—		3,900		(3,900		)	—
	Customer lists	76,019		(76,019		)	—		76,019		(73,235		)	2,784
		$	259,911	$	(259,020	)	$	891	$	259,394	$	(255,483	)	$	3,911
	We evaluate goodwill for impairment annually during the fourth quarter of our fiscal year, or more frequently when indicators of impairment are present. There were no changes to goodwill balances during the third quarter or first nine months of fiscal 2015. The following table provides a summary of the goodwill balance at both December 31, 2014 and March 31, 2014 (in thousands):
		Goodwill		Accumulated			Net Amount
				Impairment Losses
	Balance	$	394,613	$	(339,000	)	$	55,613

ACCRUED_WARRANTY

ACCRUED WARRANTY	9 Months Ended
	Dec. 31, 2014
Product Warranties Disclosures [Abstract]
ACCRUED WARRANTY	ACCRUED WARRANTY
	The quarterly changes in the accrued warranty balance were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31, 2014			December 31, 2013			December 31, 2014			December 31, 2013
	Beginning balance	$	5,290		$	6,489		$	6,116		$	7,520
	Additional warranties issued	1,596			2,018			4,843			5,947
	Adjustments for warranties issued in prior	(319		)	82			(179		)	—
	fiscal years
	Settlements	(1,779		)	(2,462		)	(5,992		)	(7,340		)
	Ending balance	$	4,788		$	6,127		$	4,788		$	6,127
	We warrant our products against certain defects for one to three years. A provision for estimated future costs and estimated returns for repair or replacement relating to warranty is recorded when products are shipped and revenue recognized. Our estimate of future costs to satisfy warranty obligations is primarily based on historical trends and, if believed to be significantly different from historical trends, estimates of future failure rates and future costs of repair. Future costs of repair include materials consumed in the repair, labor and overhead amounts necessary to perform the repair. If we determine in a future period that either actual failure rates or actual costs of repair were to differ from our estimates, we record the impact of those differences in that future period.

DEBT

DEBT	9 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
DEBT	DEBT
	On April 24, 2014, our credit agreement with Wells Fargo (as amended, the “WF credit agreement”) was amended to allow us to use proceeds from the credit agreement to repay our convertible subordinated notes so long as we have a fixed charge coverage ratio of 1.5 and liquidity of $25 million. The amendment also impacted the available line, maturity date and certain covenants and compliance obligations, which are reflected below.
	Under the WF credit agreement, we have the ability to borrow the lesser of $75 million or the amount of the monthly borrowing base under a senior secured revolving credit facility. The WF credit agreement matures March 29, 2017 so long as an amount sufficient to repay the $133.7 million of 3.50% convertible subordinated notes due November 15, 2015 ("3.50% notes") is available for borrowing under the WF credit agreement or is deposited in a WF controlled account prior to August 16, 2015. Otherwise, the WF credit agreement matures on August 16, 2015. Quarterly, we are required to pay a 0.375% commitment fee on undrawn amounts under the revolving credit facility. During the third quarter of fiscal 2015, the 3.50% notes were reclassified from convertible subordinated debt, long-term to convertible subordinated debt, current as they are due November 15, 2015.
	The WF credit agreement contains customary covenants, including cross-default provisions, as well as financial covenants. Average liquidity must exceed $15.0 million each month. The fixed charge coverage ratio is required to be greater than 1.2 for the 12 month period ending on the last day of any month in which the covenant is applicable. This covenant is applicable only in months in which borrowings exceed $5.0 million at any time during the month. To avoid triggering mandatory field audits and Wells Fargo controlling our cash receipts, we must maintain liquidity of at least $20.0 million at all times. The fixed charge coverage ratio, average liquidity and liquidity are defined in the WF credit agreement and/or amendments. Certain schedules in the compliance certificate must be filed monthly if borrowings exceed $5.0 million; otherwise they are to be filed quarterly.
	We have letters of credit totaling $1.0 million, reducing the maximum amount available to borrow by this amount at December 31, 2014. As of December 31, 2014, and during the third quarter and first nine months of fiscal 2015, we were in compliance with all covenants and had no outstanding balance on the line of credit.

RESTRUCTURING_CHARGES

RESTRUCTURING CHARGES	9 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
RESTRUCTURING CHARGES	RESTRUCTURING CHARGES
	The types of restructuring expense for the three and nine months ended December 31, 2014 and December 31, 2013 were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31, 2014			December 31, 2013			December 31, 2014			December 31, 2013
	Severance and benefits	$	279		$	1,645		$	384		$	4,236
	Facilities	(92		)	41			1,282			129
	Other	—			360			10			537
	Total	$	187		$	2,046		$	1,676		$	4,902
	For the first nine months of fiscal 2015, restructuring charges were primarily due to facilities costs as a result of further consolidating our facilities in the U.S. In the third quarter of fiscal 2014, restructuring charges were primarily due to severance and benefits costs as a result of right-sizing our workforce related to business model changes. For the first nine months of fiscal 2014, restructuring charges were largely due to severance and benefits costs resulting from strategic management decisions to outsource our manufacturing operations and further consolidate production and service activities.
	Accrued Restructuring
	The following tables show the activity and the estimated timing of future payouts for accrued restructuring (in thousands):
		Three Months Ended December 31, 2014
		Severance			Facilities			Total
		and Benefits
	Balance as of September 30, 2014	$	248		$	6,753		$	7,001
	Restructuring costs	368			179			547
	Restructuring charge reversal	(89		)	(271		)	(360		)
	Cash payments	(2		)	(987		)	(989		)
	Other non-cash	—			(2		)	(2		)
	Balance as of December 31, 2014	$	525		$	5,672		$	6,197
		Nine Months Ended December 31, 2014
		Severance			Facilities			Other			Total
		and Benefits
	Balance as of March 31, 2014	$	1,574		$	6,724		$	70		$	8,368
	Restructuring costs	687			1,553			13			2,253
	Restructuring charge reversal	(303		)	(271		)	(3		)	(577		)
	Cash payments	(1,433		)	(2,634		)	(80		)	(4,147		)
	Other non-cash	—			300			—			300
	Balance as of December 31, 2014	$	525		$	5,672		$	—		$	6,197
		As of December 31, 2014
		Severance and			Facilities			Total
		Benefits
	Estimated timing of future payouts:
	Next twelve months	$	376		$	2,760		$	3,136
	January 2016 through February 2021	149			2,912			3,061
		$	525		$	5,672		$	6,197
	Facility restructuring accruals will be paid in accordance with the respective facility lease terms.

STOCK_INCENTIVE_PLANS_AND_SHAR

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION	9 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION	STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION
	Share-Based Compensation
	The following table summarizes share-based compensation (in thousands):
		Three Months Ended								Nine Months Ended
		December 31, 2014				December 31, 2013				December 31, 2014			December 31, 2013
	Share-based compensation:
	Cost of revenue	$	362			$	509			$	1,109		$	1,560
	Research and development	600				862				1,983			2,638
	Sales and marketing	830				994				2,627			3,148
	General and administrative	1,126				1,056				2,936			2,922
		$	2,918			$	3,421			$	8,655		$	10,268
	Share-based compensation by type of award:
	Stock options	$	153			$	207			$	464		$	647
	Restricted stock	2,584				2,923				7,597			8,629
	Stock purchase plan	181				291				594			992
		$	2,918			$	3,421			$	8,655		$	10,268
	Stock Incentive Plans - Grants and Fair Value
	Stock Options
	No stock options were granted during the third quarter or first nine months of fiscal 2015 or 2014. The Black-Scholes option pricing model is used to estimate the fair value of stock options.
	Restricted Stock
	The fair value of restricted stock units (“RSUs”) granted is the intrinsic value as of the respective grant date since the RSUs are granted at no cost to the employee. The weighted-average grant date fair values of RSUs granted during the third quarter and first nine months of fiscal 2015 were $1.13 and $1.24, respectively. The weighted-average grant date fair values of RSUs granted during the third quarter and first nine months of fiscal 2014 were $1.25 and $1.40, respectively.
	During the second quarter of fiscal 2015, we granted 2.4 million RSUs with performance conditions (“performance RSUs”), and the total fair value of these RSUs at the grant date was $3.0 million. Performance RSUs will become eligible for vesting based on Quantum achieving certain revenue and operating income targets through the end of fiscal 2015. Share-based compensation expense for performance RSUs is recognized when it is probable that the performance conditions will be achieved. As of December 31, 2014, we have recorded $0.2 million of share-based compensation expense for the performance RSUs.
	Stock Purchase Plan
	Under the Stock Purchase Plan, rights to purchase shares are typically granted during the second and fourth quarter of each fiscal year. The value of rights to purchase shares granted in the first nine months of fiscal 2015 and fiscal 2014, respectively, was estimated at the date of the grant using the Black-Scholes option pricing model. The weighted-average grant date fair values and the assumptions used in calculating fair values for the nine month periods ended December 31, 2014 and 2013 were as follows:
		Nine Months Ended
		31-Dec-14				31-Dec-13
	Option life (in years)	0.5				0.5
	Risk-free interest rate	0.06		%		0.07		%
	Stock price volatility	32.19		%		47.65		%
	Weighted-average grant date fair value	$	0.3			$	0.47
	Stock Incentive Plans - Activity
	Stock Options
	A summary of activity relating to our stock options follows (options and aggregate intrinsic value in thousands):
		Options			Weighted-				Weighted-		Aggregate
					Average				Average		Intrinsic Value
					Exercise Price				Remaining
									Contractual Term
	Outstanding as of March 31, 2014	7,997			$	1.78
	Exercised	(684	)		0.97
	Forfeited	(109	)		2.19
	Expired	(2,018	)		2.84
	Outstanding as of December 31, 2014	5,186			$	1.46			1.92		$	2,709
	Vested and expected to vest at December 31, 2014	5,185			$	1.46			1.92		$	2,709
	Exercisable as of December 31, 2014	5,078			$	1.44			1.89		$	2,709
	Restricted Stock
	A summary of activity relating to our restricted stock follows (shares in thousands):
		Shares			Weighted-Average
					Grant Date
					Fair Value
	Nonvested at March 31, 2014	12,108			$	1.8
	Granted	10,282			1.24
	Vested	(5,540	)		2.17
	Forfeited	(767	)		1.53
	Nonvested at December 31, 2014	16,083			$	1.33

INCOME_TAXES

INCOME TAXES	9 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES
	Income tax provisions for the third quarter and first nine months of fiscal 2015 were $0.3 million and $0.9 million, respectively, and were $0.3 million and $1.2 million for the third quarter and first nine months of fiscal 2014, respectively. Income tax provisions for each of these periods reflect expenses for foreign income taxes and state taxes. We have provided a full valuation allowance against our U.S. net deferred tax assets due to our history of net losses, difficulty in predicting future results and our conclusion that we cannot rely on projections of future taxable income to realize the deferred tax assets. Significant management judgment is required in determining our deferred tax assets and liabilities and valuation allowances for purposes of assessing our ability to realize any future benefit from our net deferred tax assets. We intend to maintain this valuation allowance until sufficient positive evidence exists to support a reversal or decrease in this allowance. Future income tax expense will be reduced to the extent that we have sufficient positive evidence to support a reversal of, or decrease in, our valuation allowance.

NET_INCOME_LOSS_PER_SHARE

NET INCOME (LOSS) PER SHARE	9 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
NET INCOME (LOSS) PER SHARE	NET INCOME (LOSS) PER SHARE
	The following is the computation of basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended					Nine Months Ended
		December 31, 2014		December 31, 2013			December 31, 2014		December 31, 2013
	Numerator:
	Net income (loss)	$	6,931	$	(2,458	)	$	3,855	$	(7,070	)
	Adjustment for interest expense on convertible subordinated notes, net of taxes	902		—			—		—
	Income (loss) for purposes of computing income (loss) per diluted share	$	7,833	$	(2,458	)	$	3,855	$	(7,070	)
	Denominator:
	Weighted average shares:
	Basic	255,860		248,135			253,773		246,183
	Dilutive shares from stock plans	4,493		—			4,034		—
	Dilutive shares from convertible subordinated notes	42,502		—			—		—
	Diluted	302,855		248,135			257,807		246,183
	Basic net income (loss) per share	$	0.03	$	(0.01	)	$	0.02	$	(0.03	)
	Diluted net income (loss) per share	$	0.03	$	(0.01	)	$	0.01	$	(0.03	)
	Dilutive and potentially dilutive common shares from the Stock Incentive Plans are determined by applying the treasury stock method to the assumed exercise of outstanding options and the assumed vesting of outstanding restricted stock units. The dilutive impact related to our convertible subordinated notes is determined by applying the if-converted method, which includes adding the related weighted average shares to the denominator and the related interest expense to net income.
	The computations of diluted net income (loss) per share for the periods presented exclude the following because the effect would have been anti-dilutive:
	•	For the third quarter of fiscal 2014 and the first nine months of fiscal 2015 and fiscal 2014, 42.5 million weighted average shares related to our 4.50% convertible subordinated notes were excluded. For the third quarter of fiscal 2014, $0.9 million of related interest expense was excluded. For the first nine months of fiscal 2015 and 2014, $2.7 million of related interest was excluded.
	•	For the third quarter and the first nine months of fiscal 2015, 30.9 million weighted average shares related to our 3.50% convertible subordinated notes were excluded. For the third quarter and the first nine months of fiscal 2014, 31.2 million weighted average shares were excluded. For the third quarter of fiscal 2015 and 2014, $1.4 million of related interest expense was excluded. For the first nine months of fiscal 2015 and 2014, $4.3 million of related interest expense was excluded.
	•	For the third quarter and first nine months of fiscal 2015, options to purchase 1.8 million and 2.6 million weighted average shares, respectively, were excluded. For the third quarter and first nine months of fiscal 2014, options to purchase 11.5 million and 13.8 million weighted average shares, respectively, were excluded.
	•	Unvested RSUs of 0.1 million weighted average shares for the third quarter and first nine months of fiscal 2015 were excluded. Unvested RSUs of 11.5 million and 10.7 million weighted average shares for the third quarter and first nine months of fiscal 2014, respectively, were excluded.

LEGAL_PROCEEDINGS

LEGAL PROCEEDINGS	9 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
LEGAL PROCEEDINGS	LEGAL PROCEEDINGS
	On February 18, 2014, Crossroads Systems, Inc. (“Crossroads”) filed a patent infringement lawsuit against Quantum in the U.S. District Court for the Western District of Texas, alleging infringement of U.S. Patents 6,425,035 and 7,934,041. An amended complaint filed on April 15, 2014 also alleged infringement of U.S. patent 7,051,147. Crossroads asserts that we have incorporated Crossroads' patented technology into our StorNext QX and Q-Series lines of disk array products, and into our Scalar libraries. Crossroads seeks unspecified monetary damages and injunctive relief. Crossroads has already dismissed all claims of infringement with respect to the StorNext QX and Q-Series products. We do not believe it is reasonably possible that we will pay material damages related to this lawsuit.
	On September 23, 2014, we filed a lawsuit against Crossroads in the U.S. District Court for the Northern District of California alleging patent infringement of our patent 6,766,412 by Crossroad’s StrongBox VSeries Library Solution product. We are seeking injunctive relief and the recovery of monetary damages. On December 4, 2014, we amended our complaint alleging infringement of a second patent, 5,940,849, related to Crossroads's SPHiNX product line.

SUBSEQUENT_EVENT

SUBSEQUENT EVENT	9 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
SUBSEQUENT EVENT	On January 28, 2015, we entered into a private transaction with a note holder to repurchase $50.0 million of aggregate principal amount of the 3.50% convertible subordinated notes due November 15, 2015 for $51.0 million. In connection with this transaction, during the fourth quarter of fiscal 2015, we will record a loss on debt extinguishment of $1.3 million comprised of the loss of $1.0 million from the notes repurchased and $0.3 million of unamortized debt costs related to the repurchased notes. We also paid accrued interest on the repurchased notes of $0.4 million. We funded this transaction using cash on hand.

FAIR_VALUE_Tables

FAIR VALUE (Tables)	9 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of assets measured and recorded at fair value on a recurring basis	Our assets measured and recorded at fair value on a recurring basis consist of money market funds, which are included in cash and cash equivalents in our Condensed Consolidated Balance Sheets, and are valued using quoted market prices (level 1 fair value measurements) at the respective balance sheet dates (in thousands):
		As of
		December 31, 2014		March 31, 2014
	Money market funds	$	65,562	$	93,077
Schedule of carrying value and fair value of financial liabilities	Our financial liabilities were comprised primarily of convertible subordinated debt at December 31, 2014 and March 31, 2014. The carrying value and fair value based on quoted market prices in less active markets (level 2 fair value measurement) were as follows (in thousands):
		As of
		December 31, 2014				March 31, 2014
		Carrying Value		Fair Value		Carrying Value		Fair Value
	Convertible subordinated debt	$	203,735	$	219,820	$	203,735	$	203,820

INVENTORIES_Tables

INVENTORIES (Tables)	9 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Schedule of manufacturing inventories	Manufacturing inventories and service parts inventories consisted of the following (in thousands):
		As of
		December 31, 2014		March 31, 2014
	Manufacturing inventories:
	Finished goods	$	21,870	$	18,069
	Work in process	68		1,056
	Materials and purchased parts	16,360		15,690
		$	38,298	$	34,815
Schedule of service parts inventories
		As of
		December 31, 2014		March 31, 2014
	Service parts inventories:
	Finished goods	$	17,663	$	17,926
	Component parts	6,698		7,703
		$	24,361	$	25,629

INTANGIBLE_ASSETS_AND_GOODWILL1

INTANGIBLE ASSETS AND GOODWILL (Tables)	9 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of the carrying value of intangible assets	The following provides a summary of the carrying value of intangible assets (in thousands):
		As of
		December 31, 2014							March 31, 2014
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Amount		Amortization			Amount		Amount		Amortization			Amount
	Purchased technology	$	179,992	$	(179,101	)	$	891	$	179,475	$	(178,348	)	$	1,127
	Trademarks	3,900		(3,900		)	—		3,900		(3,900		)	—
	Customer lists	76,019		(76,019		)	—		76,019		(73,235		)	2,784
		$	259,911	$	(259,020	)	$	891	$	259,394	$	(255,483	)	$	3,911
Summary of the goodwill balance	The following table provides a summary of the goodwill balance at both December 31, 2014 and March 31, 2014 (in thousands):
		Goodwill		Accumulated			Net Amount
				Impairment Losses
	Balance	$	394,613	$	(339,000	)	$	55,613

ACCRUED_WARRANTY_Tables

ACCRUED WARRANTY (Tables)	9 Months Ended
	Dec. 31, 2014
Product Warranties Disclosures [Abstract]
Changes in the accrued warranty balance	The quarterly changes in the accrued warranty balance were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31, 2014			December 31, 2013			December 31, 2014			December 31, 2013
	Beginning balance	$	5,290		$	6,489		$	6,116		$	7,520
	Additional warranties issued	1,596			2,018			4,843			5,947
	Adjustments for warranties issued in prior	(319		)	82			(179		)	—
	fiscal years
	Settlements	(1,779		)	(2,462		)	(5,992		)	(7,340		)
	Ending balance	$	4,788		$	6,127		$	4,788		$	6,127

RESTRUCTURING_CHARGES_Tables

RESTRUCTURING CHARGES (Tables)	9 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Types of restructuring expense	The types of restructuring expense for the three and nine months ended December 31, 2014 and December 31, 2013 were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31, 2014			December 31, 2013			December 31, 2014			December 31, 2013
	Severance and benefits	$	279		$	1,645		$	384		$	4,236
	Facilities	(92		)	41			1,282			129
	Other	—			360			10			537
	Total	$	187		$	2,046		$	1,676		$	4,902
Activity for accrued restructuring	The following tables show the activity and the estimated timing of future payouts for accrued restructuring (in thousands):
		Three Months Ended December 31, 2014
		Severance			Facilities			Total
		and Benefits
	Balance as of September 30, 2014	$	248		$	6,753		$	7,001
	Restructuring costs	368			179			547
	Restructuring charge reversal	(89		)	(271		)	(360		)
	Cash payments	(2		)	(987		)	(989		)
	Other non-cash	—			(2		)	(2		)
	Balance as of December 31, 2014	$	525		$	5,672		$	6,197
		Nine Months Ended December 31, 2014
		Severance			Facilities			Other			Total
		and Benefits
	Balance as of March 31, 2014	$	1,574		$	6,724		$	70		$	8,368
	Restructuring costs	687			1,553			13			2,253
	Restructuring charge reversal	(303		)	(271		)	(3		)	(577		)
	Cash payments	(1,433		)	(2,634		)	(80		)	(4,147		)
	Other non-cash	—			300			—			300
	Balance as of December 31, 2014	$	525		$	5,672		$	—		$	6,197
Estimated timing of future payouts for accrued restructuring
		As of December 31, 2014
		Severance and			Facilities			Total
		Benefits
	Estimated timing of future payouts:
	Next twelve months	$	376		$	2,760		$	3,136
	January 2016 through February 2021	149			2,912			3,061
		$	525		$	5,672		$	6,197

STOCK_INCENTIVE_PLANS_AND_SHAR1

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Tables)	9 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of share-based compensation	The following table summarizes share-based compensation (in thousands):
		Three Months Ended								Nine Months Ended
		December 31, 2014				December 31, 2013				December 31, 2014			December 31, 2013
	Share-based compensation:
	Cost of revenue	$	362			$	509			$	1,109		$	1,560
	Research and development	600				862				1,983			2,638
	Sales and marketing	830				994				2,627			3,148
	General and administrative	1,126				1,056				2,936			2,922
		$	2,918			$	3,421			$	8,655		$	10,268
	Share-based compensation by type of award:
	Stock options	$	153			$	207			$	464		$	647
	Restricted stock	2,584				2,923				7,597			8,629
	Stock purchase plan	181				291				594			992
		$	2,918			$	3,421			$	8,655		$	10,268
Schedule of weighted-average grant date fair values and the assumptions used in calculating fair values	The weighted-average grant date fair values and the assumptions used in calculating fair values for the nine month periods ended December 31, 2014 and 2013 were as follows:
		Nine Months Ended
		31-Dec-14				31-Dec-13
	Option life (in years)	0.5				0.5
	Risk-free interest rate	0.06		%		0.07		%
	Stock price volatility	32.19		%		47.65		%
	Weighted-average grant date fair value	$	0.3			$	0.47
Summary of activity relating to stock options	A summary of activity relating to our stock options follows (options and aggregate intrinsic value in thousands):
		Options			Weighted-				Weighted-		Aggregate
					Average				Average		Intrinsic Value
					Exercise Price				Remaining
									Contractual Term
	Outstanding as of March 31, 2014	7,997			$	1.78
	Exercised	(684	)		0.97
	Forfeited	(109	)		2.19
	Expired	(2,018	)		2.84
	Outstanding as of December 31, 2014	5,186			$	1.46			1.92		$	2,709
	Vested and expected to vest at December 31, 2014	5,185			$	1.46			1.92		$	2,709
	Exercisable as of December 31, 2014	5,078			$	1.44			1.89		$	2,709
Summary of activity relating to restricted stock	A summary of activity relating to our restricted stock follows (shares in thousands):
		Shares			Weighted-Average
					Grant Date
					Fair Value
	Nonvested at March 31, 2014	12,108			$	1.8
	Granted	10,282			1.24
	Vested	(5,540	)		2.17
	Forfeited	(767	)		1.53
	Nonvested at December 31, 2014	16,083			$	1.33

NET_INCOME_LOSS_PER_SHARE_Tabl

NET INCOME (LOSS) PER SHARE (Tables)	9 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Computation of basic and diluted net income (loss) per share	The following is the computation of basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended					Nine Months Ended
		December 31, 2014		December 31, 2013			December 31, 2014		December 31, 2013
	Numerator:
	Net income (loss)	$	6,931	$	(2,458	)	$	3,855	$	(7,070	)
	Adjustment for interest expense on convertible subordinated notes, net of taxes	902		—			—		—
	Income (loss) for purposes of computing income (loss) per diluted share	$	7,833	$	(2,458	)	$	3,855	$	(7,070	)
	Denominator:
	Weighted average shares:
	Basic	255,860		248,135			253,773		246,183
	Dilutive shares from stock plans	4,493		—			4,034		—
	Dilutive shares from convertible subordinated notes	42,502		—			—		—
	Diluted	302,855		248,135			257,807		246,183
	Basic net income (loss) per share	$	0.03	$	(0.01	)	$	0.02	$	(0.03	)
	Diluted net income (loss) per share	$	0.03	$	(0.01	)	$	0.01	$	(0.03	)

REVISION_OF_PRIOR_PERIOD_FINAN1

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Details) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2013	Mar. 31, 2013
Cumulative overstatement of revenue and accounts receivable
Error Corrections And Prior Period Adjustments Revisions [Line Items]
Cumulative error			$0.70
Overstatement (understatement) of revenue
Error Corrections And Prior Period Adjustments Revisions [Line Items]
Amount of error	0.1	0.1
Cumulative overstatement of rent expense and total other accrued liabilities and other long-term liabilities
Error Corrections And Prior Period Adjustments Revisions [Line Items]
Cumulative error			2.1
Overstatement of general and administrative expense
Error Corrections And Prior Period Adjustments Revisions [Line Items]
Amount of error	$0.10	$0.10

ACQUISITION_Details

ACQUISITION (Details) (USD $)	0 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Jul. 29, 2014	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Payment for business acquisition, net of cash acquired	$517	$517	$0

FAIR_VALUE_Schedule_of_Fair_Va

FAIR VALUE (Schedule of Fair Value of Money Market Funds) (Details) (Level 1 fair value measurements, Money market funds, USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Level 1 fair value measurements | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$65,562	$93,077

FAIR_VALUE_Schedule_of_Carryin

FAIR VALUE (Schedule of Carrying Value and Fair Value of Financial Liabilities) (Details) (Convertible subordinated debt, USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Carrying Value	$203,735	$203,735
Level 2 fair value measurements
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	$219,820	$203,820

INVENTORIES_Schedule_of_Manufa

INVENTORIES (Schedule of Manufacturing Inventories) (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Manufacturing inventories:
Finished goods	$21,870	$18,069
Work in process	68	1,056
Materials and purchased parts	16,360	15,690
Manufacturing inventories	$38,298	$34,815

INVENTORIES_Schedule_of_Servic

INVENTORIES (Schedule of Service Parts Inventories) (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Service parts inventories:
Finished goods	$17,663	$17,926
Component parts	6,698	7,703
Service parts inventories	$24,361	$25,629

INTANGIBLE_ASSETS_AND_GOODWILL2

INTANGIBLE ASSETS AND GOODWILL (Schedule of Intangible Assets) (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$259,911	$259,394
Accumulated Amortization	-259,020	-255,483
Net Amount	891	3,911
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	179,992	179,475
Accumulated Amortization	-179,101	-178,348
Net Amount	891	1,127
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Amount	3,900	3,900
Accumulated Amortization	-3,900	-3,900
Net Amount	0	0
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Amount	76,019	76,019
Accumulated Amortization	-76,019	-73,235
Net Amount	$0	$2,784

INTANGIBLE_ASSETS_AND_GOODWILL3

INTANGIBLE ASSETS AND GOODWILL (Schedule of Goodwill) (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$394,613	$394,613
Accumulated Impairment Losses	-339,000	-339,000
Net Amount	$55,613	$55,613

ACCRUED_WARRANTY_Details

ACCRUED WARRANTY (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$5,290	$6,489	$6,116	$7,520
Additional warranties issued	1,596	2,018	4,843	5,947
Adjustments for warranties issued in prior fiscal years	-319	82	-179	0
Settlements	-1,779	-2,462	-5,992	-7,340
Ending balance	$4,788	$6,127	$4,788	$6,127

DEBT_Details

DEBT (Details) (USD $)	0 Months Ended
	Apr. 24, 2014	Dec. 31, 2014	Apr. 24, 2014	Dec. 31, 2013
3.50% convertible subordinated notes
Debt Instrument [Line Items]
Principal amount outstanding	$133,700,000		$133,700,000
Interest per annum on the principal amount	3.50%	3.50%	3.50%	3.50%
Debt due date	15-Nov-15
Wells Fargo credit agreement
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.5		1.5
Amount of liquidity to be below for covenant to be applicable	25,000,000		25,000,000
Line of credit facility, maximum borrowing amount	75,000,000		75,000,000
Line of credit facility due date	29-Mar-17
Line of credit facility, frequency of commitment fee payment	Quarterly
Line of credit facility, percent commitment fee	0.38%
Line of credit facility, average liquidity when covenant is applied	15,000,000		15,000,000
Fixed charge coverage ratio, ratio when covenant is applicable	1.2		1.2
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly	5,000,000		5,000,000
Amount of liquidity required to avoid mandatory field audits	20,000,000		20,000,000
Wells Fargo credit agreement | Letter of credit
Debt Instrument [Line Items]
Total letters of credit outstanding		1,000,000

RESTRUCTURING_CHARGES_Schedule

RESTRUCTURING CHARGES (Schedule of Restructuring Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Restructuring and Related Activities [Abstract]
Severance and benefits	$279	$1,645	$384	$4,236
Facilities	-92	41	1,282	129
Other	0	360	10	537
Total	$187	$2,046	$1,676	$4,902

RESTRUCTURING_CHARGES_Schedule1

RESTRUCTURING CHARGES (Schedule of Accrued Restructuring) (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Beginning balance	$7,001	$8,368
Restructuring costs	547	2,253
Restructuring charge reversal	-360	-577
Cash payments	-989	-4,147
Other non-cash	-2	300
Ending balance	6,197	6,197
Severance and Benefits
Restructuring Reserve [Roll Forward]
Beginning balance	248	1,574
Restructuring costs	368	687
Restructuring charge reversal	-89	-303
Cash payments	-2	-1,433
Other non-cash	0	0
Ending balance	525	525
Facilities
Restructuring Reserve [Roll Forward]
Beginning balance	6,753	6,724
Restructuring costs	179	1,553
Restructuring charge reversal	-271	-271
Cash payments	-987	-2,634
Other non-cash	-2	300
Ending balance	5,672	5,672
Other
Restructuring Reserve [Roll Forward]
Beginning balance		70
Restructuring costs		13
Restructuring charge reversal		-3
Cash payments		-80
Other non-cash		0
Ending balance	$0	$0

RESTRUCTURING_CHARGES_Schedule2

RESTRUCTURING CHARGES (Schedule of Estimated Timing of Future Payouts) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	$6,197
Next twelve months
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	3,136
January 2016 through February 2021
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	3,061
Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	525
Severance and Benefits | Next twelve months
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	376
Severance and Benefits | January 2016 through February 2021
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	149
Facilities
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	5,672
Facilities | Next twelve months
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	2,760
Facilities | January 2016 through February 2021
Restructuring Cost and Reserve [Line Items]
Estimated future payouts of severance and benefits	$2,912

STOCK_INCENTIVE_PLANS_AND_SHAR2

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Share-based Compensation) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	$2,918	$3,421	$8,655	$10,268
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	153	207	464	647
Restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	2,584	2,923	7,597	8,629
Stock purchase plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	181	291	594	992
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	362	509	1,109	1,560
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	600	862	1,983	2,638
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	830	994	2,627	3,148
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	$1,126	$1,056	$2,936	$2,922

STOCK_INCENTIVE_PLANS_AND_SHAR3

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Restricted Stock) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$2,918,000	$3,421,000	$8,655,000	$10,268,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair values of RSUs	$1.13	$1.25	$1.24	$1.40
Number of shares granted, stock awards			10,282
Performance RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, stock awards					2,400
Fair value of RSUs at the grant date					3,000,000
Share-based Compensation			$200,000

STOCK_INCENTIVE_PLANS_AND_SHAR4

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Assumptions Used) (Details) (Stock purchase plan, USD $)	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option life (in years)	0 years 6 months 0 days	0 years 6 months 0 days
Risk-free interest rate	0.06%	0.07%
Stock price volatility	32.19%	47.65%
Weighted-average grant date fair value	$0.30	$0.47

STOCK_INCENTIVE_PLANS_AND_SHAR5

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Stock Option Activity) (Details) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Options
Outstanding, beginning balance	7,997
Exercised	-684
Forfeited	-109
Expired	-2,018
Outstanding, ending balance	5,186
Vested and expected to vest	5,185
Exercisable	5,078
Weighted- Average Exercise Price
Outstanding, beginning balance	$1.78
Exercised	$0.97
Forfeited	$2.19
Expired	$2.84
Outstanding, ending balance	$1.46
Vested and expected to vest	$1.46
Exercisable	$1.44
Weighted- Average Remaining Contractual Term
Outstanding	1 year 10 months 30 days
Vested and expected to vest	1 year 10 months 30 days
Exercisable	1 year 10 months 20 days
Aggregate Intrinsic Value
Outstanding	$2,709
Vested and expected to vest	2,709
Exercisable	$2,709

STOCK_INCENTIVE_PLANS_AND_SHAR6

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Restricted Stock Activity) (Details) (Restricted Stock, USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock
Shares
Nonvested, beginning balance			12,108
Granted			10,282
Vested			-5,540
Forfeited			-767
Nonvested, ending balance	16,083		16,083
Weighted-Average Grant Date Fair Value
Nonvested, beginning balance			$1.80
Granted	$1.13	$1.25	$1.24	$1.40
Vested			$2.17
Forfeited			$1.53
Nonvested, ending balance	$1.33		$1.33

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision	$336	$308	$940	$1,232

NET_INCOME_LOSS_PER_SHARE_Comp

NET INCOME (LOSS) PER SHARE (Computation of Net Income (Loss) Per Share) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income (loss)	$6,931	($2,458)	$3,855	($7,070)
Adjustment for interest expense on convertible subordinated notes, net of taxes	902	0	0	0
Income (loss) for purposes of computing income (loss) per diluted share	$7,833	($2,458)	$3,855	($7,070)
Weighted average shares:
Basic	255,860	248,135	253,773	246,183
Dilutive shares from stock plans	4,493	0	4,034	0
Dilutive shares from convertible subordinated notes	42,502	0	0	0
Diluted	302,855	248,135	257,807	246,183
Basic net income (loss) per share	$0.03	($0.01)	$0.02	($0.03)
Diluted net income (loss) per share	$0.03	($0.01)	$0.01	($0.03)

NET_INCOME_LOSS_PER_SHARE_Narr

NET INCOME (LOSS) PER SHARE (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Apr. 24, 2014
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	1.8	11.5	2.6	13.8
Restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	0.1	11.5	0.1	10.7
4.50% convertible subordinated notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		42.5	42.5	42.5
Interest per annum on the principal amount	4.50%		4.50%
Antidilutive income excluded from computation of earnings per share		$0.90	$2.70	$2.70
3.50% convertible subordinated notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	30.9	31.2	30.9	31.2
Interest per annum on the principal amount	3.50%	3.50%	3.50%	3.50%	3.50%
Antidilutive income excluded from computation of earnings per share	$1.40	$1.40	$4.30	$4.30

SUBSEQUENT_EVENT_Details

SUBSEQUENT EVENT (Details) (3.50% convertible subordinated notes, USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Apr. 24, 2014	Dec. 31, 2013	Jan. 28, 2015
Subsequent Event [Line Items]
Interest per annum on the principal amount		3.50%	3.50%	3.50%
Forecast
Subsequent Event [Line Items]
Unamortized debt costs	$300,000
Accrued interest paid	400,000
Subsequent event
Subsequent Event [Line Items]
Aggregate principal amount					50,000,000
Interest per annum on the principal amount					3.50%
Repurchase amount					51,000,000
Loss on debt extinguishment	1,300,000
Loss from notes repurchased	$1,000,000