Quantum (QMCO) 10-Q 7 Feb 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Dec. 31, 2013	Jan. 31, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'QUANTUM CORP /DE/	'
Entity Central Index Key	'0000709283	'
Current Fiscal Year End Date	'--03-31	'
Entity Filer Category	'Accelerated Filer	'
Trading Symbol	'QTM	'
Entity Common Stock, Shares Outstanding	'	248,631,352
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Dec-13	'
Document Fiscal Period Focus	'Q3	'
Document Fiscal Year Focus	'2014	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$80,115	$68,976
Restricted cash	2,652	3,023
Accounts receivable, net of allowance for doubtful accounts of $61 and $62, respectively	105,121	97,546
Manufacturing inventories	43,621	53,075
Service parts inventories	27,743	35,368
Other current assets	11,063	11,831
Total current assets	270,315	269,819
Long-term assets:	'	'
Property and equipment, less accumulated depreciation	18,457	21,456
Intangible assets, less accumulated amortization	6,140	12,813
Goodwill	55,613	55,613
Other long-term assets	9,749	9,892
Total long-term assets	89,959	99,774
Total Assets	360,274	369,593
Current liabilities:	'	'
Accounts payable	38,994	47,634
Accrued warranty	6,127	7,520
Deferred revenue, current	88,968	91,108
Accrued restructuring charges, current	3,554	3,021
Accrued compensation	29,338	30,964
Other accrued liabilities	13,580	14,503
Total current liabilities	180,561	194,750
Long-term liabilities:	'	'
Deferred revenue, long-term	39,350	38,393
Convertible subordinated debt	205,000	205,000
Other long-term liabilities	14,992	15,232
Total long-term liabilities	259,342	258,625
Stockholders' deficit:	'	'
Common stock, $0.01 par value; 1,000,000 shares authorized; 248,220 and 243,080 shares issued and outstanding at December 31, 2013 and March 31, 2013, respectively	2,482	2,431
Capital in excess of par	438,452	427,611
Accumulated deficit	-526,998	-520,016
Accumulated other comprehensive income	6,435	6,192
Total stockholders' deficit	-79,629	-83,782
Total liabilities and stockholders' deficit	$360,274	$369,593

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
CONDENSED CONSOLIDATED BALANCE SHEETS [Abstract]	'	'
Allowance for doubtful accounts receivable	$61	$62
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	1,000,000	1,000,000
Common stock, shares issued	248,220	243,080
Common stock, shares outstanding	248,220	243,080

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, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]	'	'	'	'
Product revenue	$98,348	$112,490	$269,024	$306,316
Service revenue	36,926	35,340	109,612	107,138
Royalty revenue	10,656	11,538	46,693	34,081
Total revenue	145,930	159,368	425,329	447,535
Cost of product revenue	64,502	72,007	181,167	204,641
Cost of service revenue	19,706	19,360	56,053	59,896
Restructuring charges	288	'	377	'
Total cost of revenue	84,496	91,367	237,597	264,537
Gross margin	61,434	68,001	187,732	182,998
Operating expenses:	'	'	'	'
Research and development	16,010	18,615	49,063	56,639
Sales and marketing	29,424	33,588	89,577	102,473
General and administrative	14,279	14,851	43,789	46,910
Restructuring charges	1,758	6,602	4,525	6,602
Total operating expenses	61,471	73,656	186,954	212,624
Income (loss) from operations	-37	-5,655	778	-29,626
Other income and expense	370	60	791	-388
Interest expense	-2,440	-2,230	-7,319	-5,896
Loss before income taxes	-2,107	-7,825	-5,750	-35,910
Income tax provision	308	348	1,232	1,217
Net loss	($2,415)	($8,173)	($6,982)	($37,127)
Basic and diluted net loss per share:	($0.01)	($0.04)	($0.03)	($0.16)
Weighted average common and common equivalent shares:	'	'	'	'
Basic and diluted	248,135	240,786	246,183	239,099

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]	'	'	'	'
Net loss	($2,415)	($8,173)	($6,982)	($37,127)
Other comprehensive income, net of taxes:	'	'	'	'
Foreign currency translation adjustments	59	150	454	7
Net unrealized gain (loss) on revaluation of long-term intercompany balances	-49	-76	-211	98
Total other comprehensive income	10	74	243	105
Total comprehensive loss	($2,405)	($8,099)	($6,739)	($37,022)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:	'	'
Net loss	($6,982)	($37,127)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'	'
Depreciation	8,217	9,283
Amortization	7,898	12,013
Service parts lower of cost or market adjustment	8,715	7,026
Deferred income taxes	86	231
Share-based compensation	10,268	11,729
Changes in assets and liabilities:	'	'
Accounts receivable	-7,575	-5,074
Manufacturing inventories	5,372	1,502
Service parts inventories	2,993	2,857
Accounts payable	-8,672	-9,748
Accrued warranty	-1,393	160
Deferred revenue	-1,182	-4,650
Accrued restructuring charges	309	3,184
Accrued compensation	-1,786	-538
Other assets and liabilities	-732	1,020
Net cash provided by (used in) operating activities	15,536	-8,132
Cash flows from investing activities:	'	'
Purchases of property and equipment	-5,026	-9,389
Decrease in restricted cash	517	691
Purchases of other investments	-534	-2,169
Return of principal from other investments	'	208
Net cash used in investing activities	-5,043	-10,659
Cash flows from financing activities:	'	'
Repayments of long-term debt	'	-49,495
Borrowings of convertible subordinated debt, net	'	67,701
Payment of taxes due upon vesting of restricted stock	-1,807	-1,926
Proceeds from issuance of common stock	2,431	2,604
Net cash provided by financing activities	624	18,884
Effect of exchange rate changes on cash and cash equivalents	22	-14
Net increase in cash and cash equivalents	11,139	79
Cash and cash equivalents at beginning of period	68,976	51,621
Cash and cash equivalents at end of period	80,115	51,340
Supplemental disclosure of cash flow information:	'	'
Purchases of property and equipment included in accounts payable	$514	$460

BASIS_OF_PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Dec. 31, 2013
BASIS OF PRESENTATION [Abstract]	'
BASIS OF PRESENTATION	'
	NOTE 1: BASIS OF PRESENTATION
	Quantum Corporation ("Quantum", the "Company", "us" or "we"), founded in 1980, is a leading expert in end-to-end scale-out storage and data protection, providing solutions for sharing, archiving and accessing digital assets over the entire data lifecycle. Our customers, ranging from small businesses to major enterprises, have trusted us to address their most demanding content workflow challenges. We provide solutions for storing and protecting information in physical, virtual and cloud environments that are designed to help customers Be CertainTM they have a comprehensive storage foundation to maximize the value of their data by making it accessible whenever and wherever needed, offering indefinite retention 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. In the Condensed Consolidated Statements of Cash Flows prior period income taxes payable has been reclassified into other assets and liabilities to conform to current period presentation. This reclassification had no impact on total assets, total liabilities, income (loss) from operations, net loss or net cash provided by (used in) operating activities. 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, 2013 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, 2013 included in our Annual Report on Form 10-K, as filed with the Securities and Exchange Commission on June 7, 2013.
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 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 an 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 will adopt ASU 2013-11 prospectively in the first quarter of fiscal 2015 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, 2013
REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS [Abstract]	'
REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS	'
	NOTE 2: REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS
	During the first quarter of fiscal 2014, we identified an error related to certain allowances recorded for estimated future price adjustments on products and services sold to our customers that had accumulated over a significant number of years, resulting in a $1.5 million cumulative overstatement of revenue and accounts receivable at April 1, 2013. Revenue for fiscal 2013, 2012 and 2011 was $0.1 million overstated, $0.1 million understated and $0.1 million overstated, respectively, for this error. In addition, we identified a $0.7 million under accrual of sales commission expense for the fourth quarter of fiscal 2013 that was not recorded in fiscal 2013. The cumulative effect of recording these two items in the first quarter of fiscal 2014 would have been a $2.2 million reduction in net income.
	During fiscal 2014, we also identified three balance sheet misclassifications between current and long-term related to certain prepaid expenses, restructuring accruals and straight-line rent balances. As of March 31, 2013, current assets were overstated by $0.4 million and current liabilities were overstated by $7.4 million for these items. As of March 31, 2012, current liabilities were overstated by $5.2 million for the straight-line rent item.
	In addition, we had previously identified the following items:
	A $0.7 million overstatement of DXi OEM software revenue in fiscal 2010 that was corrected as an out-of-period adjustment in fiscal 2011;
	A $0.5 million understatement of royalty revenue in fiscal 2011 that was corrected as an out-of-period adjustment in fiscal 2012; and
	A $0.9 million understatement of payroll tax expense on commissions that was corrected as an out-of-period adjustment in fiscal 2013. Of the cumulative adjustment, $0.3 million related to fiscal 2012 and $0.6 million related to periods prior to fiscal 2011.
	We evaluated these errors in accordance with the Securities and Exchange Commission ("SEC") Staff Accounting Bulletin No. 99 and determined that the errors were 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 error had been recorded during the first quarter of fiscal 2014, the impact would have been significant to the Condensed Consolidated Statement of Operations for the quarter ended June 30, 2013. As a result, we have determined that it is appropriate to revise our prior period financial statements in accordance with the SEC's Staff Accounting Bulletin No. 108 for the items discussed above. The revisions to correct these items in the applicable prior periods are reflected in the financial information herein and will be reflected in future filings containing such financial information. The revisions had no net impact on our net income (loss) per diluted share for any prior period.
	The foregoing revisions are not material to any prior period's Consolidated Balance Sheets, Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income (Loss) or Consolidated Statements of Stockholders' Deficit and have no impact on the Consolidated Statement of Cash Flows. The impact of these revisions to our Consolidated Balance Sheets at March 31, 2013 and 2012; our Consolidated Statements of Operations for the years ended March 31, 2013, 2012 and 2011; and our Condensed Consolidated Statements of Operations for each quarter of fiscal 2013 and 2012 and the nine months ended December 31, 2013 and 2012 is summarized as follows (in thousands, except per share amounts):
	Consolidated Balance Sheets
	The As Reported column includes certain reclassifications to conform to the current presentation.
		As of March 31,
		2013							2012
		As Reported				As Revised			As Reported			As Revised
	Accounts receivable	$	99,093			$	97,546		$	110,840		$	109,399
	Other current assets		12,192				11,831			14,729			14,729
	Total current assets		271,727				269,819			281,221			279,780
	Other long-term assets		9,531				9,892			6,962			6,962
	Total long-term assets		99,413				99,774			114,127			114,127
	Total assets		371,140				369,593			395,348			393,907
	Accrued restructuring charges, current		4,756				3,021			1,752			1,752
	Accrued compensation		30,311				30,964			31,971			32,835
	Other accrued liabilities		20,188				14,503			18,999			13,798
	Total current liabilities		201,517				194,750			210,053			205,716
	Other long-term liabilities		7,812				15,232			11,050			16,251
	Total long-term liabilities		251,205				258,625			231,975			237,176
	Accumulated deficit		(517,816	)			(520,016	)		(465,397	)		(467,702	)
	Total stockholders' deficit		(81,582	)			(83,782	)		(46,680	)		(48,985	)
	Total liabilities and stockholders' deficit		371,140				369,593			395,348			393,907
	Consolidated Statements of Operations - Annual
		Fiscal Year Ended March 31,
		2013							2012						2011
		As Reported				As Revised			As Reported			As Revised			As Reported		As Revised
	Product revenue	$	399,043			$	398,937		$	451,340		$	451,468		$	456,903	$	457,505
	Royalty revenue		44,492				44,492			56,666			56,154			64,272		64,784
	Total revenue		587,572				587,466			652,370			651,986			672,270		673,384
	Cost of service revenue		79,647				79,604			88,459			88,466			94,311		94,311
	Total cost of revenue		346,921				346,878			378,535			378,542			389,288		389,288
	Gross margin		240,651				240,588			273,835			273,444			282,982		284,096
	Sales and marketing expenses		137,041				136,873			130,938			131,239			122,768		122,767
	Total operating expenses		283,351				283,183			270,143			270,444			258,278		258,277
	Income (loss) from operations		(42,700	)			(42,595	)		5,192			4,500			24,704		25,819
	Income (loss) before income taxes		(51,258	)			(51,153	)		(7,922	)		(8,614	)		4,554		5,669
	Net income (loss)		(52,419	)			(52,314	)		(8,809	)		(9,501	)		4,541		5,656
	Diluted net income (loss) per share		(0.22	)			(0.22	)		(0.04	)		(0.04	)		0.02		0.02
	Consolidated Statements of Operations - Quarterly - Fiscal 2013
		Fiscal 2013
		1st Quarter							2nd Quarter
		As Reported				As Revised			As Reported			As Revised
	Product revenue	$	93,811			$	93,785		$	100,067		$	100,041
	Total revenue		140,879				140,853			147,340			147,314
	Cost of service revenue		20,334				20,304			20,232			20,232
	Total cost of revenue		85,084				85,054			88,116			88,116
	Gross margin		55,795				55,799			59,224			59,198
	Sales and marketing expenses		35,278				34,444			34,441			34,441
	Total operating expenses		70,607				69,773			69,195			69,195
	Loss from operations		(14,812	)			(13,974	)		(9,971	)		(9,997	)
	Loss before income taxes		(16,999	)			(16,161	)		(11,898	)		(11,924	)
	Net loss		(17,498	)			(16,660	)		(12,268	)		(12,294	)
	Diluted net loss per share		(0.07	)			(0.07	)		(0.05	)		(0.05	)
		3rd Quarter							4th Quarter
		As Reported				As Revised			As Reported			As Revised
	Product revenue	$	112,517			$	112,490		$	92,648		$	92,621
Total revenue		159,395				159,368			139,958			139,931
Cost of service revenue		19,360				19,360			19,721			19,708
Total cost of revenue		91,367				91,367			82,354			82,341
Gross margin		68,028				68,001			57,604			57,590
Sales and marketing expenses		33,588				33,588			33,734			34,400
Total operating expenses		73,656				73,656			69,893			70,559
Loss from operations		(5,628	)			(5,655	)		(12,289	)		(12,969	)
Loss before income taxes		(7,798	)			(7,825	)		(14,563	)		(15,243	)
Net loss		(8,146	)			(8,173	)		(14,507	)		(15,187	)
Diluted net loss per share		(0.04	)			(0.04	)		(0.06	)		(0.06	)
	Nine Months Ended
	31-Dec-12
	As Reported				As Revised
Product revenue	$	306,395			$	306,316
Total revenue		447,614				447,535
Cost of service revenue		59,926				59,896
Total cost of revenue		264,567				264,537
Gross margin		183,047				182,998
Sales and marketing expenses		103,307				102,473
Total operating expenses		213,458				212,624
Loss from operations		(30,411	)			(29,626	)
Loss before income taxes		(36,695	)			(35,910	)
Net loss		(37,912	)			(37,127	)
Diluted net loss per share		(0.16	)			(0.16	)
Consolidated Statements of Operations - Quarterly - Fiscal 2012
	Fiscal 2012
	1st Quarter							2nd Quarter
	As Reported				As Revised			As Reported			As Revised
Product revenue	$	102,268			$	102,300		$	115,126		$	115,158
Royalty revenue		14,571				14,059			14,015			14,015
Total revenue		153,535				153,055			165,039			165,071
Cost of service revenue		22,066				22,064			21,129			21,132
Total cost of revenue		90,273				90,271			93,428			93,431
Gross margin		63,262				62,784			71,611			71,640
Sales and marketing expenses		30,525				30,263			31,115			31,171
Total operating expenses		64,943				64,681			66,211			66,267
Income (loss) from operations		(1,681	)			(1,897	)		6,900			6,873
Income (loss) before income taxes		(4,588	)			(4,804	)		3,866			3,839
Net income (loss)		(5,226	)			(5,442	)		3,561			3,534
Diluted net income (loss) per share		(0.02	)			(0.02	)		0.01			0.01
	3rd Quarter							4th Quarter
	As Reported				As Revised			As Reported			As Revised
Product revenue	$	124,081			$	124,113		$	109,865		$	109,897
Royalty revenue		14,049				14,049			14,031			14,031
Total revenue		173,492				173,524			160,304			160,336
Cost of service revenue		22,537				22,548			22,727			22,722
Total cost of revenue		99,775				99,786			95,059			95,054
Gross margin		73,717				73,738			65,245			65,282
Sales and marketing expenses		33,350				33,736			35,948			36,069
Total operating expenses		66,738				67,124			72,251			72,372
Income (loss) from operations		6,979				6,614			(7,006	)		(7,090	)
Income (loss) before income taxes		4,387				4,022			(11,587	)		(11,671	)
Net income (loss)		3,914				3,549			(11,058	)		(11,142	)
Diluted net income (loss) per share		0.02				0.02			(0.05	)		(0.05	)
	Nine Months Ended
	31-Dec-11
	As Reported			As Revised
Product revenue	$	341,475		$	341,571
Royalty revenue		42,635			42,123
Total revenue		492,066			491,650
Cost of service revenue		65,732			65,744
Total cost of revenue		283,476			283,488
Gross margin		208,590			208,162
Sales and marketing expenses		94,990			95,170
Total operating expenses		197,892			198,072
Income from operations		12,198			11,590
Income before income taxes		3,665			3,057
Net income		2,249			1,641
Diluted net income per share		0.01			0.01
These revisions impacted our Condensed Consolidated Statements of Comprehensive Income (Loss) and Consolidated Statements of Stockholders' Deficit for each period by an amount equal to the impact to net income (loss) for the applicable period.

FAIR_VALUE

FAIR VALUE	9 Months Ended
	Dec. 31, 2013
FAIR VALUE [Abstract]	'
FAIR VALUE	'
	NOTE 3: FAIR VALUE
	The 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
		31-Dec-13		31-Mar-13
	Money market funds	$	72,327	$	60,496
	We did not record impairments to any non-financial assets in the third quarter and first nine months of fiscal 2014 or 2013. We do not have any non-financial liabilities measured and recorded at fair value on a non-recurring basis.
	We had $205.0 million in convertible subordinated debt at December 31, 2013, and the estimated fair value of our convertible subordinated debt was approximately $200.2 million, based on quoted market prices in less active markets (level 2 fair value measurements).

INVENTORIES

INVENTORIES	9 Months Ended
	Dec. 31, 2013
INVENTORIES [Abstract]	'
INVENTORIES	'
	NOTE 4: INVENTORIES
	Manufacturing inventories and service parts inventories consisted of the following (in thousands):
		As of
		31-Dec-13		31-Mar-13
	Manufacturing inventories:
	Finished goods	$	22,002	$	19,480
	Work in process		1,611		8,633
	Materials and purchased parts		20,008		24,962
		$	43,621	$	53,075
		As of
		31-Dec-13		31-Mar-13
	Service parts inventories:
	Finished goods	$	18,331	$	19,750
	Component parts		9,412		15,618
		$	27,743	$	35,368

INTANGIBLE_ASSETS_AND_GOODWILL

INTANGIBLE ASSETS AND GOODWILL	9 Months Ended
	Dec. 31, 2013
INTANGIBLE ASSETS AND GOODWILL [Abstract]	'
INTANGIBLE ASSETS AND GOODWILL	'
	NOTE 5: INTANGIBLE ASSETS AND GOODWILL
	We evaluate our amortizable and indefinite-lived intangible assets ("long-lived assets") for impairment whenever indicators of impairment exist and 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 2014 and 2013. The following provides a summary of the carrying value of intangible assets (in thousands):
		As of
		31-Dec-13							31-Mar-13
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Amount		Amortization			Amount		Amount		Amortization			Amount
	Purchased technology	$	180,613	$	(179,272	)	$	1,341	$	180,613	$	(178,168	)	$	2,445
	Trademarks		3,900		(3,900	)		-		3,900		(3,900	)		-
	Customer lists		105,719		(101,078	)		4,641		105,719		(95,509	)		10,210
	In-process research and development		158		-			158		158		-			158
		$	290,390	$	(284,250	)	$	6,140	$	290,390	$	(277,577	)	$	12,813
	Total intangible amortization expense was $2.2 million and $6.7 million for the three and nine months ended December 31, 2013, respectively, and was $2.8 million and $11.1 million for the three and nine months ended December 31, 2012, respectively.
	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 2014. The following table provides a summary of the goodwill balance at both December 31, 2013 and March 31, 2013 (in thousands):
		Goodwill		Accumulated			Net Amount
				Impairment Losses
	Balance	$	394,613	$	(339,000	)	$	55,613

ACCRUED_WARRANTY

ACCRUED WARRANTY	9 Months Ended
	Dec. 31, 2013
ACCRUED WARRANTY [Abstract]	'
ACCRUED WARRANTY	'
	NOTE 6: ACCRUED WARRANTY
	The quarterly and year-to-date changes in the accrued warranty balance were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Beginning balance	$	6,489		$	7,904		$	7,520		$	7,586
	Additional warranties issued		2,018			2,037			5,947			7,240
	Adjustments for warranties issued in prior fiscal years		82			364			-			954
	Settlements		(2,462	)		(2,559	)		(7,340	)		(8,034	)
	Ending balance	$	6,127		$	7,746		$	6,127		$	7,746
	We generally warrant our products against defects for 1 to 3 years. A provision for estimated future costs and estimated returns for credit 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 including materials consumed in the repair, labor and overhead amounts necessary to perform the repair. If future actual failure rates differ from our estimates, we record the impact in subsequent periods. If future actual costs to repair were to differ significantly from our estimates, we record the impact of these unforeseen cost differences in subsequent periods.

RESTRUCTURING_CHARGES

RESTRUCTURING CHARGES	9 Months Ended
	Dec. 31, 2013
RESTRUCTURING CHARGES [Abstract]	'
RESTRUCTURING CHARGES	'
	NOTE 7: RESTRUCTURING CHARGES
	In the third quarter of fiscal 2014, restructuring charges were primarily the result of right-sizing our workforce with our continuing operations plans and for the first nine months of fiscal 2014 restructuring charges were largely due to strategic management decisions to outsource our manufacturing operations and further consolidate production and service activities. In the third quarter and first nine months of fiscal 2013, restructuring charges were primarily due to severance charges for various positions eliminated worldwide across most functions of the business to align spending with revenue expectations. The types of restructuring expense for the three and nine months ended December 31, 2013 and December 31, 2012 were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	By expense type
	Severance and benefits	$	1,645		$	6,363		$	4,236		$	6,363
	Facilities		41			239			129			239
	Other		360			-			537			-
	Total	$	2,046		$	6,602		$	4,902		$	6,602
	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, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Balance as of September 30, 2013	$	3,125			$	1,896			$	87		$	5,108
	Restructuring charges		1,834				41				360			2,235
	Restructuring charges reversal		(189	)			-				-			(189	)
	Cash payments		(1,659	)			(130	)			(307	)		(2,096	)
	Balance as of December 31, 2013	$	3,111			$	1,807			$	140		$	5,058
		Nine Months Ended December 31, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Balance as of March 31, 2013	$	2,711			$	2,045			$	-		$	4,756
	Restructuring charges		5,373				129				537			6,039
	Restructuring charges reversal		(1,137	)			-				-			(1,137	)
	Cash payments		(3,836	)			(367	)			(397	)		(4,600	)
	Balance as of December 31, 2013	$	3,111			$	1,807			$	140		$	5,058
		As of December 31, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Estimated timing of future payouts:
	Next twelve months	$	3,111			$	303			$	140		$	3,554
	January 2015 through February 2021		-				1,504				-			1,504
		$	3,111			$	1,807			$	140		$	5,058
	The $1.8 million of severance and benefit restructuring costs for the three months ended December 31, 2013 was primarily due to right-sizing our workforce with our continuing operations plans, and the $5.4 million severance and benefit restructuring costs for the nine months ended December 31, 2013 was primarily the result of deciding to outsource our manufacturing operations and further consolidate production and service activities. The restructuring charge reversal was primarily due to actual costs being lower than estimated, followed by employees transferring from eliminated positions to fill other staffing needs during the third quarter and first nine months of fiscal 2014. Other restructuring expenses were comprised of incremental retention bonuses for certain key employees whose positions are being eliminated, freight charges and travel costs incurred as a result of these restructuring actions.
	We anticipate the majority of the $3.1 million and $0.1 million severance and benefits and other restructuring accruals, respectively, will be paid by the end of fiscal 2014. Facility restructuring accruals will be paid in accordance with the respective facility lease terms. The $1.5 million of lease payments scheduled to occur between January 2015 and February 2021 is included in other long-term liabilities in the Condensed Consolidated Balance Sheets.

STOCK_INCENTIVE_PLANS_AND_SHAR

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION	9 Months Ended
	Dec. 31, 2013
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION [Abstract]	'
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION	'
	NOTE 8: 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,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Share-based compensation:
	Cost of revenue	$	509		$	626		$	1,560		$	1,839
	Research and development		862			925			2,638			2,772
	Sales and marketing		994			1,273			3,148			3,603
	General and administrative		1,056			892			2,922			3,515
		$	3,421		$	3,716		$	10,268		$	11,729
	Share-based compensation by type of award:
	Stock options	$	207		$	239		$	647		$	1,445
	Restricted stock		2,923			2,986			8,629			8,767
	Stock purchase plan		291			491			992			1,517
		$	3,421		$	3,716		$	10,268		$	11,729
	Stock Options
	No stock options were granted during the third quarter or first nine months of fiscal 2014 or 2013. 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 restricted stock units are granted at no cost to the employees. 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. The weighted-average grant date fair values of RSUs granted during the third quarter and first nine months of fiscal 2013 were $1.44 and $1.99, respectively
	During the third quarter of fiscal 2014, we granted 0.2 million RSUs with performance conditions ("performance RSUs") and the fair value of the performance RSUs at the grant date was $0.2 million. Performance RSUs will become eligible for vesting based on Quantum achieving certain revenue and operating income targets through the end of fiscal 2014. Share-based compensation expense for performance RSUs is recognized when it is probable that the performance conditions will be achieved. As of December 31, 2013, no share-based compensation expense was recognized for the performance RSUs.
	During the second quarter of fiscal 2014, we granted 0.8 million RSUs with market conditions ("market RSUs") and estimated the fair value of these market RSUs using a Monte Carlo simulation model. The number of market RSUs is dependent on Quantum's common stock achieving certain 60-day average stock price targets as of specified dates, which vest immediately to two years after the specified dates.
	The Monte Carlo model requires the input of assumptions including expected volatility, risk-free interest rate and expected term in order to simulate a large number of possible outcomes to provide an estimated fair value of the market RSUs. We used an expected volatility of 66%, a risk free interest rate of 0.5% and expected terms of ten months, twenty two months and thirty four months that mirrors the various vesting dates of the awards. The estimated fair value of the market RSUs was $0.7 million which will be recognized over the respective vesting periods of the awards.
	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 2014 and fiscal 2013, respectively, was estimated at the date of the grant. The weighted-average grant date fair values and the assumptions used in calculating fair values for the nine months ended December 31, 2013 and 2012 are as follows:
		Nine Months Ended
		December 31,				December 31,
		2013				2012
	Option life (in years)		0.5				0.5
	Risk-free interest rate		0.07	%			0.15	%
	Stock price volatility		47.65	%			74.81	%
	Weighted-average grant date fair value	$	0.47			$	0.51
	Stock 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, 2013	16,050			$	2.14
	Exercised	(535	)			0.99
	Forfeited	(1,108	)			2.2
	Expired	(3,011	)			2.07
	Outstanding as of December 31, 2013	11,396			$	2.21		1.66		$	1,031
	Vested and expected to vest at December 31, 2013	11,369			$	2.2		1.66		$	1,031
	Exercisable as of December 31, 2013	10,944			$	2.19		1.56		$	1,027
	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, 2013	9,887			$	2.43
	Granted	7,751				1.4
	Vested	(4,241	)			2.4
	Forfeited	(1,041	)			2.06
	Nonvested at December 31, 2013	12,356			$	1.83

INCOME_TAXES

INCOME TAXES	9 Months Ended
	Dec. 31, 2013
INCOME TAXES [Abstract]	'
INCOME TAXES	'
	NOTE 9: INCOME TAXES
	Income tax provisions for the third quarter and first nine months of fiscal 2014 were $0.3 million and $1.2 million, respectively, and were $0.3 million and $1.2 million for the third quarter and first nine months of fiscal 2013, 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_LOSS_PER_SHARE

NET LOSS PER SHARE	9 Months Ended
	Dec. 31, 2013
NET LOSS PER SHARE [Abstract]	'
NET LOSS PER SHARE	'
	NOTE 10: NET LOSS PER SHARE
	The following is the computation of basic and diluted net loss per share (in thousands, except per share data):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Net loss	$	(2,415	)	$	(8,173	)	$	(6,982	)	$	(37,127	)
	Weighted average basic and diluted shares		248,135			240,786			246,183			239,099
	Basic and diluted net loss per share	$	(0.01	)	$	(0.04	)	$	(0.03	)	$	(0.16	)
	The computations of diluted net loss per share for the periods presented exclude the following because the effect would have been anti-dilutive:
	For all periods presented, 31.2 million weighted equivalent shares of 3.50% convertible subordinated notes were excluded. For the third quarter and first nine months of fiscal 2014, 42.5 million weighted equivalent shares of 4.50% convertible subordinated notes were excluded. For the third quarter and first nine months of fiscal 2013, 28.5 million and 9.4 million weighted equivalent shares of 4.50% convertible subordinated notes 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. For the third quarter and first nine months of fiscal 2013, options to purchase 16.4 million and 17.7 million weighted average shares, respectively, 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. Unvested RSUs of 10.7 million and 10.1 million weighted average shares for the third quarter and first nine months of fiscal 2013, respectively, were excluded.

LEGAL_PROCEEDINGS

LEGAL PROCEEDINGS	9 Months Ended
	Dec. 31, 2013
LEGAL PROCEEDINGS [Abstract]	'
LEGAL PROCEEDINGS	'
	NOTE 11: LEGAL PROCEEDINGS
	Overland
	On June 28, 2012, Overland Storage, Inc. ("Overland") filed a patent infringement lawsuit against Quantum in the U.S. District Court for the Southern District of California, alleging that certain of its automated tape libraries fall within the scope of patents 6,328,766 and 6,353,581. Overland is seeking injunctive relief, as well as the recovery of unspecified monetary damages, including treble damages for willful infringement. We do not believe we infringe the Overland patents and we will defend ourselves vigorously. We do not believe there is a reasonable possibility that we will pay material damages related to this lawsuit.
	On August 28, 2012, we filed a lawsuit against Overland in the U.S. District Court for the Southern District of California, for patent infringements of our patents 6,542,787; 6,498,771; 5,925,119 and 5,491,812 by the products in Overland's NEO tape library and SnapServer product lines. We are seeking injunctive relief and the recovery of monetary damages.
	On April 12, 2013, we filed a lawsuit against Overland in the U.S. District Court for the Southern District of California, for patent infringements of our patent 7,263,596 by the products in Overland's SnapScale product lines. We are seeking injunctive relief and the recovery of monetary damages.
	Compression Technology Solutions
	On September 12, 2011, Compression Technology Solutions LLC ("CTS") filed a patent infringement lawsuit against a group of companies, consisting of Quantum, CA., Inc., EMC Corporation, Hewlett-Packard Company, International Business Machines Corp., NetApp, Inc. and Quest Software, Inc., in the U.S. District Court for the Eastern District of Missouri, alleging that certain unspecified products of the defendants, characterized as "deduplication software systems," and, in the case of Quantum, including Quantum's "DXi Series Deduplication software," fall within the scope of patent 5,414,650. CTS was seeking injunctive relief, as well as the recovery of monetary damages, including treble damages for willful infringement. We do not believe we infringe the CTS patent; we believe that the CTS patent is invalid, and we defended ourselves vigorously. In April 2012, our motion to transfer venue was granted and the lawsuit was transferred to the U.S. District Court for the Northern District of California. On May 29, 2013, our motion for summary judgment was granted, with all of the asserted claims held invalid by the District Court, and the lawsuit against Quantum and the other defendants has been dismissed with prejudice. On July 10, 2013, CTS appealed the decision of the District Court to the United States Court of Appeals for the Federal Circuit.

REVISION_OF_PRIOR_PERIOD_FINAN1

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Tables)	9 Months Ended
	Dec. 31, 2013
REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS [Abstract]	'
Revision to Prior Year Income	'
	Consolidated Balance Sheets
	The As Reported column includes certain reclassifications to conform to the current presentation.
		As of March 31,
		2013							2012
		As Reported				As Revised			As Reported			As Revised
	Accounts receivable	$	99,093			$	97,546		$	110,840		$	109,399
	Other current assets		12,192				11,831			14,729			14,729
	Total current assets		271,727				269,819			281,221			279,780
	Other long-term assets		9,531				9,892			6,962			6,962
	Total long-term assets		99,413				99,774			114,127			114,127
	Total assets		371,140				369,593			395,348			393,907
	Accrued restructuring charges, current		4,756				3,021			1,752			1,752
	Accrued compensation		30,311				30,964			31,971			32,835
	Other accrued liabilities		20,188				14,503			18,999			13,798
	Total current liabilities		201,517				194,750			210,053			205,716
	Other long-term liabilities		7,812				15,232			11,050			16,251
	Total long-term liabilities		251,205				258,625			231,975			237,176
	Accumulated deficit		(517,816	)			(520,016	)		(465,397	)		(467,702	)
	Total stockholders' deficit		(81,582	)			(83,782	)		(46,680	)		(48,985	)
	Total liabilities and stockholders' deficit		371,140				369,593			395,348			393,907
	Consolidated Statements of Operations - Annual
		Fiscal Year Ended March 31,
		2013							2012						2011
		As Reported				As Revised			As Reported			As Revised			As Reported		As Revised
	Product revenue	$	399,043			$	398,937		$	451,340		$	451,468		$	456,903	$	457,505
	Royalty revenue		44,492				44,492			56,666			56,154			64,272		64,784
	Total revenue		587,572				587,466			652,370			651,986			672,270		673,384
	Cost of service revenue		79,647				79,604			88,459			88,466			94,311		94,311
	Total cost of revenue		346,921				346,878			378,535			378,542			389,288		389,288
	Gross margin		240,651				240,588			273,835			273,444			282,982		284,096
	Sales and marketing expenses		137,041				136,873			130,938			131,239			122,768		122,767
	Total operating expenses		283,351				283,183			270,143			270,444			258,278		258,277
	Income (loss) from operations		(42,700	)			(42,595	)		5,192			4,500			24,704		25,819
	Income (loss) before income taxes		(51,258	)			(51,153	)		(7,922	)		(8,614	)		4,554		5,669
	Net income (loss)		(52,419	)			(52,314	)		(8,809	)		(9,501	)		4,541		5,656
	Diluted net income (loss) per share		(0.22	)			(0.22	)		(0.04	)		(0.04	)		0.02		0.02
	Consolidated Statements of Operations - Quarterly - Fiscal 2013
		Fiscal 2013
		1st Quarter							2nd Quarter
		As Reported				As Revised			As Reported			As Revised
	Product revenue	$	93,811			$	93,785		$	100,067		$	100,041
	Total revenue		140,879				140,853			147,340			147,314
	Cost of service revenue		20,334				20,304			20,232			20,232
	Total cost of revenue		85,084				85,054			88,116			88,116
	Gross margin		55,795				55,799			59,224			59,198
	Sales and marketing expenses		35,278				34,444			34,441			34,441
	Total operating expenses		70,607				69,773			69,195			69,195
	Loss from operations		(14,812	)			(13,974	)		(9,971	)		(9,997	)
	Loss before income taxes		(16,999	)			(16,161	)		(11,898	)		(11,924	)
	Net loss		(17,498	)			(16,660	)		(12,268	)		(12,294	)
	Diluted net loss per share		(0.07	)			(0.07	)		(0.05	)		(0.05	)
		3rd Quarter							4th Quarter
		As Reported				As Revised			As Reported			As Revised
	Product revenue	$	112,517			$	112,490		$	92,648		$	92,621
	Total revenue		159,395				159,368			139,958			139,931
	Cost of service revenue		19,360				19,360			19,721			19,708
	Total cost of revenue		91,367				91,367			82,354			82,341
	Gross margin		68,028				68,001			57,604			57,590
	Sales and marketing expenses		33,588				33,588			33,734			34,400
	Total operating expenses		73,656				73,656			69,893			70,559
	Loss from operations		(5,628	)			(5,655	)		(12,289	)		(12,969	)
	Loss before income taxes		(7,798	)			(7,825	)		(14,563	)		(15,243	)
	Net loss		(8,146	)			(8,173	)		(14,507	)		(15,187	)
Diluted net loss per share		(0.04	)			(0.04	)		(0.06	)		(0.06	)
	Nine Months Ended
	31-Dec-12
	As Reported				As Revised
Product revenue	$	306,395			$	306,316
Total revenue		447,614				447,535
Cost of service revenue		59,926				59,896
Total cost of revenue		264,567				264,537
Gross margin		183,047				182,998
Sales and marketing expenses		103,307				102,473
Total operating expenses		213,458				212,624
Loss from operations		(30,411	)			(29,626	)
Loss before income taxes		(36,695	)			(35,910	)
Net loss		(37,912	)			(37,127	)
Diluted net loss per share		(0.16	)			(0.16	)
Consolidated Statements of Operations - Quarterly - Fiscal 2012
	Fiscal 2012
	1st Quarter							2nd Quarter
	As Reported				As Revised			As Reported			As Revised
Product revenue	$	102,268			$	102,300		$	115,126		$	115,158
Royalty revenue		14,571				14,059			14,015			14,015
Total revenue		153,535				153,055			165,039			165,071
Cost of service revenue		22,066				22,064			21,129			21,132
Total cost of revenue		90,273				90,271			93,428			93,431
Gross margin		63,262				62,784			71,611			71,640
Sales and marketing expenses		30,525				30,263			31,115			31,171
Total operating expenses		64,943				64,681			66,211			66,267
Income (loss) from operations		(1,681	)			(1,897	)		6,900			6,873
Income (loss) before income taxes		(4,588	)			(4,804	)		3,866			3,839
Net income (loss)		(5,226	)			(5,442	)		3,561			3,534
Diluted net income (loss) per share		(0.02	)			(0.02	)		0.01			0.01
	3rd Quarter							4th Quarter
	As Reported				As Revised			As Reported			As Revised
Product revenue	$	124,081			$	124,113		$	109,865		$	109,897
Royalty revenue		14,049				14,049			14,031			14,031
Total revenue		173,492				173,524			160,304			160,336
Cost of service revenue		22,537				22,548			22,727			22,722
Total cost of revenue		99,775				99,786			95,059			95,054
Gross margin		73,717				73,738			65,245			65,282
Sales and marketing expenses		33,350				33,736			35,948			36,069
Total operating expenses		66,738				67,124			72,251			72,372
Income (loss) from operations		6,979				6,614			(7,006	)		(7,090	)
Income (loss) before income taxes		4,387				4,022			(11,587	)		(11,671	)
Net income (loss)		3,914				3,549			(11,058	)		(11,142	)
Diluted net income (loss) per share		0.02				0.02			(0.05	)		(0.05	)
	Nine Months Ended
	31-Dec-11
	As Reported			As Revised
Product revenue	$	341,475		$	341,571
Royalty revenue		42,635			42,123
Total revenue		492,066			491,650
Cost of service revenue		65,732			65,744
Total cost of revenue		283,476			283,488
Gross margin		208,590			208,162
Sales and marketing expenses		94,990			95,170
Total operating expenses		197,892			198,072
Income from operations		12,198			11,590
Income before income taxes		3,665			3,057
Net income		2,249			1,641
Diluted net income per share		0.01			0.01

FAIR_VALUE_Tables

FAIR VALUE (Tables)	9 Months Ended
	Dec. 31, 2013
FAIR VALUE [Abstract]	'
Fair Value, Assets Measured on Recurring Basis	'
	The 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
		31-Dec-13		31-Mar-13
	Money market funds	$	72,327	$	60,496

INVENTORIES_Tables

INVENTORIES (Tables)	9 Months Ended
	Dec. 31, 2013
INVENTORIES [Abstract]	'
Schedule of Manufacturing Inventories	'
	Manufacturing inventories and service parts inventories consisted of the following (in thousands):
		As of
		31-Dec-13		31-Mar-13
	Manufacturing inventories:
	Finished goods	$	22,002	$	19,480
	Work in process		1,611		8,633
	Materials and purchased parts		20,008		24,962
		$	43,621	$	53,075
Schedule of Service Parts Inventories	'
		As of
		31-Dec-13		31-Mar-13
	Service parts inventories:
	Finished goods	$	18,331	$	19,750
	Component parts		9,412		15,618
		$	27,743	$	35,368

INTANGIBLE_ASSETS_AND_GOODWILL1

INTANGIBLE ASSETS AND GOODWILL (Tables)	9 Months Ended
	Dec. 31, 2013
INTANGIBLE ASSETS AND GOODWILL [Abstract]	'
Schedule of Intangible Assets	'
	The following provides a summary of the carrying value of intangible assets (in thousands):
		As of
		31-Dec-13							31-Mar-13
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Amount		Amortization			Amount		Amount		Amortization			Amount
	Purchased technology	$	180,613	$	(179,272	)	$	1,341	$	180,613	$	(178,168	)	$	2,445
	Trademarks		3,900		(3,900	)		-		3,900		(3,900	)		-
	Customer lists		105,719		(101,078	)		4,641		105,719		(95,509	)		10,210
	In-process research and development		158		-			158		158		-			158
		$	290,390	$	(284,250	)	$	6,140	$	290,390	$	(277,577	)	$	12,813
Schedule of Goodwill	'
	The following table provides a summary of the goodwill balance at both December 31, 2013 and March 31, 2013 (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, 2013
ACCRUED WARRANTY [Abstract]	'
Schedule of Product Warranty Liability	'
	The quarterly and year-to-date changes in the accrued warranty balance were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Beginning balance	$	6,489		$	7,904		$	7,520		$	7,586
	Additional warranties issued		2,018			2,037			5,947			7,240
	Adjustments for warranties issued in prior fiscal years		82			364			-			954
	Settlements		(2,462	)		(2,559	)		(7,340	)		(8,034	)
	Ending balance	$	6,127		$	7,746		$	6,127		$	7,746

RESTRUCTURING_CHARGES_Tables

RESTRUCTURING CHARGES (Tables)	9 Months Ended
	Dec. 31, 2013
RESTRUCTURING CHARGES [Abstract]	'
Schedule of Restructuring and Related Costs	'
	The types of restructuring expense for the three and nine months ended December 31, 2013 and December 31, 2012 were (in thousands):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	By expense type
	Severance and benefits	$	1,645		$	6,363		$	4,236		$	6,363
	Facilities		41			239			129			239
	Other		360			-			537			-
	Total	$	2,046		$	6,602		$	4,902		$	6,602
Schedule of Restructuring Reserve by Type of Cost	'
	The following tables show the activity and the estimated timing of future payouts for accrued restructuring (in thousands):
		Three Months Ended December 31, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Balance as of September 30, 2013	$	3,125			$	1,896			$	87		$	5,108
	Restructuring charges		1,834				41				360			2,235
	Restructuring charges reversal		(189	)			-				-			(189	)
	Cash payments		(1,659	)			(130	)			(307	)		(2,096	)
	Balance as of December 31, 2013	$	3,111			$	1,807			$	140		$	5,058
		Nine Months Ended December 31, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Balance as of March 31, 2013	$	2,711			$	2,045			$	-		$	4,756
	Restructuring charges		5,373				129				537			6,039
	Restructuring charges reversal		(1,137	)			-				-			(1,137	)
	Cash payments		(3,836	)			(367	)			(397	)		(4,600	)
	Balance as of December 31, 2013	$	3,111			$	1,807			$	140		$	5,058
Schedule of Estimated Future Payouts for Accrued Restructuring	'
		As of December 31, 2013
		Severance				Facilities				Other			Total
		and Benefits
	Estimated timing of future payouts:
	Next twelve months	$	3,111			$	303			$	140		$	3,554
	January 2015 through February 2021		-				1,504				-			1,504
		$	3,111			$	1,807			$	140		$	5,058

STOCK_INCENTIVE_PLANS_AND_SHAR1

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Tables)	9 Months Ended
	Dec. 31, 2013
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION [Abstract]	'
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	'
	The following table summarizes share-based compensation (in thousands):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Share-based compensation:
	Cost of revenue	$	509		$	626		$	1,560		$	1,839
	Research and development		862			925			2,638			2,772
	Sales and marketing		994			1,273			3,148			3,603
	General and administrative		1,056			892			2,922			3,515
		$	3,421		$	3,716		$	10,268		$	11,729
	Share-based compensation by type of award:
	Stock options	$	207		$	239		$	647		$	1,445
	Restricted stock		2,923			2,986			8,629			8,767
	Stock purchase plan		291			491			992			1,517
		$	3,421		$	3,716		$	10,268		$	11,729
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	'
	The weighted-average grant date fair values and the assumptions used in calculating fair values for the nine months ended December 31, 2013 and 2012 are as follows:
		Nine Months Ended
		December 31,				December 31,
		2013				2012
	Option life (in years)		0.5				0.5
	Risk-free interest rate		0.07	%			0.15	%
	Stock price volatility		47.65	%			74.81	%
	Weighted-average grant date fair value	$	0.47			$	0.51
Schedule of Share-based Compensation, Stock Options, Activity	'
	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, 2013	16,050			$	2.14
	Exercised	(535	)			0.99
	Forfeited	(1,108	)			2.2
	Expired	(3,011	)			2.07
	Outstanding as of December 31, 2013	11,396			$	2.21		1.66		$	1,031
	Vested and expected to vest at December 31, 2013	11,369			$	2.2		1.66		$	1,031
	Exercisable as of December 31, 2013	10,944			$	2.19		1.56		$	1,027
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	'
	A summary of activity relating to our restricted stock follows (shares in thousands):
		Shares			Weighted-Average
					Grant Date
					Fair Value
	Nonvested at March 31, 2013	9,887			$	2.43
	Granted	7,751				1.4
	Vested	(4,241	)			2.4
	Forfeited	(1,041	)			2.06
	Nonvested at December 31, 2013	12,356			$	1.83

NET_LOSS_PER_SHARE_Tables

NET LOSS PER SHARE (Tables)	9 Months Ended
	Dec. 31, 2013
NET LOSS PER SHARE [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The following is the computation of basic and diluted net loss per share (in thousands, except per share data):
		Three Months Ended						Nine Months Ended
		December 31,			December 31,			December 31,			December 31,
		2013			2012			2013			2012
	Net loss	$	(2,415	)	$	(8,173	)	$	(6,982	)	$	(37,127	)
	Weighted average basic and diluted shares		248,135			240,786			246,183			239,099
	Basic and diluted net loss per share	$	(0.01	)	$	(0.04	)	$	(0.03	)	$	(0.16	)

REVISION_OF_PRIOR_PERIOD_FINAN2

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Narrative) (Details) (USD $)

12 Months Ended

3 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2011

Mar. 31, 2013

Jun. 30, 2013

Mar. 31, 2010

Mar. 31, 2011

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2011

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2012

Cumulative Overstatement of Revenue and Accounts Receivable [Member]

Overstatement (Understatement) of Revenue [Member]

Overstatement (Understatement) of Revenue [Member]

Overstatement (Understatement) of Revenue [Member]

(Understatement) of Accrual of Sales Commission Expense [Member]

Cumulative Effect to Net Income if Recorded [Member]

Out of Period Correction of DXi OEM Software Revenue [Member]

Out of Period Correction of Royalty Revenue [Member]

Out of Period Correction of Payroll Tax Expense on Commissions [Member]

Out of Period Correction of Payroll Tax Expense on Commissions [Member]

Out of Period Correction of Payroll Tax Expense on Commissions [Member]

Current Assets - Balance Sheet Misclassification [Member]

Current Liabilities - Balance Sheet Misclassification [Member]

Current Liabilities - Balance Sheet Misclassification [Member]

Error Corrections And Prior Period Adjustments Revisions [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of error

$1.50

$0.10

($0.10)

$0.10

($0.70)

($2.20)

$0.70

($0.50)

($0.90)

($0.30)

($0.60)

$0.40

$7.40

$5.20

REVISION_OF_PRIOR_PERIOD_FINAN3

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Consolidated Balance Sheets) (Details) (USD $)	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
In Thousands, unless otherwise specified			As Reported [Member]	As Reported [Member]	As Revised [Member]	As Revised [Member]
Error Corrections And Prior Period Adjustments Revisions [Line Items]	'	'	'	'	'	'
Accounts receivable	$105,121	$97,546	$99,093	$110,840	$97,546	$109,399
Other current assets	11,063	11,831	12,192	14,729	11,831	14,729
Total current assets	270,315	269,819	271,727	281,221	269,819	279,780
Other long-term assets	9,749	9,892	9,531	6,962	9,892	6,962
Total long-term assets	89,959	99,774	99,413	114,127	99,774	114,127
Total assets	360,274	369,593	371,140	395,348	369,593	393,907
Accrued restructuring charges, current	3,554	3,021	4,756	1,752	3,021	1,752
Accrued compensation	29,338	30,964	30,311	31,971	30,964	32,835
Other accrued liabilities	13,580	14,503	20,188	18,999	14,503	13,798
Total current liabilities	180,561	194,750	201,517	210,053	194,750	205,716
Other long-term liabilities	14,992	15,232	7,812	11,050	15,232	16,251
Total long-term liabilities	259,342	258,625	251,205	231,975	258,625	237,176
Accumulated deficit	-526,998	-520,016	-517,816	-465,397	-520,016	-467,702
Total stockholders' deficit	-79,629	-83,782	-81,582	-46,680	-83,782	-48,985
Total liabilities and stockholders' deficit	$360,274	$369,593	$371,140	$395,348	$369,593	$393,907

REVISION_OF_PRIOR_PERIOD_FINAN4

REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Consolidated Statements of Operations) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended								9 Months Ended		12 Months Ended			3 Months Ended								9 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
					As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Reported [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]	As Revised [Member]
Error Corrections And Prior Period Adjustments Revisions [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Product revenue	$98,348	$112,490	$269,024	$306,316	$92,648	$112,517	$100,067	$93,811	$109,865	$124,081	$115,126	$102,268	$306,395	$341,475	$399,043	$451,340	$456,903	$92,621	$112,490	$100,041	$93,785	$109,897	$124,113	$115,158	$102,300	$306,316	$341,571	$398,937	$451,468	$457,505
Royalty revenue	10,656	11,538	46,693	34,081	'	'	'	'	14,031	14,049	14,015	14,571	'	42,635	44,492	56,666	64,272	'	'	'	'	14,031	14,049	14,015	14,059	'	42,123	44,492	56,154	64,784
Total revenue	145,930	159,368	425,329	447,535	139,958	159,395	147,340	140,879	160,304	173,492	165,039	153,535	447,614	492,066	587,572	652,370	672,270	139,931	159,368	147,314	140,853	160,336	173,524	165,071	153,055	447,535	491,650	587,466	651,986	673,384
Cost of service revenue	19,706	19,360	56,053	59,896	19,721	19,360	20,232	20,334	22,727	22,537	21,129	22,066	59,926	65,732	79,647	88,459	94,311	19,708	19,360	20,232	20,304	22,722	22,548	21,132	22,064	59,896	65,744	79,604	88,466	94,311
Total cost of revenue	84,496	91,367	237,597	264,537	82,354	91,367	88,116	85,084	95,059	99,775	93,428	90,273	264,567	283,476	346,921	378,535	389,288	82,341	91,367	88,116	85,054	95,054	99,786	93,431	90,271	264,537	283,488	346,878	378,542	389,288
Gross margin	61,434	68,001	187,732	182,998	57,604	68,028	59,224	55,795	65,245	73,717	71,611	63,262	183,047	208,590	240,651	273,835	282,982	57,590	68,001	59,198	55,799	65,282	73,738	71,640	62,784	182,998	208,162	240,588	273,444	284,096
Sales and marketing	29,424	33,588	89,577	102,473	33,734	33,588	34,441	35,278	35,948	33,350	31,115	30,525	103,307	94,990	137,041	130,938	122,768	34,400	33,588	34,441	34,444	36,069	33,736	31,171	30,263	102,473	95,170	136,873	131,239	122,767
Total operating expenses	61,471	73,656	186,954	212,624	69,893	73,656	69,195	70,607	72,251	66,738	66,211	64,943	213,458	197,892	283,351	270,143	258,278	70,559	73,656	69,195	69,773	72,372	67,124	66,267	64,681	212,624	198,072	283,183	270,444	258,277
Income (loss) from operations	-37	-5,655	778	-29,626	-12,289	-5,628	-9,971	-14,812	-7,006	6,979	6,900	-1,681	-30,411	12,198	-42,700	5,192	24,704	-12,969	-5,655	-9,997	-13,974	-7,090	6,614	6,873	-1,897	-29,626	11,590	-42,595	4,500	25,819
Income (loss) before income taxes	-2,107	-7,825	-5,750	-35,910	-14,563	-7,798	-11,898	-16,999	-11,587	4,387	3,866	-4,588	-36,695	3,665	-51,258	-7,922	4,554	-15,243	-7,825	-11,924	-16,161	-11,671	4,022	3,839	-4,804	-35,910	3,057	-51,153	-8,614	5,669
Net income (loss)	($2,415)	($8,173)	($6,982)	($37,127)	($14,507)	($8,146)	($12,268)	($17,498)	($11,058)	$3,914	$3,561	($5,226)	($37,912)	$2,249	($52,419)	($8,809)	$4,541	($15,187)	($8,173)	($12,294)	($16,660)	($11,142)	$3,549	$3,534	($5,442)	($37,127)	$1,641	($52,314)	($9,501)	$5,656
Diluted net income (loss) per share	'	'	'	'	($0.06)	($0.04)	($0.05)	($0.07)	($0.05)	$0.02	$0.01	($0.02)	($0.16)	$0.01	($0.22)	($0.04)	$0.02	($0.06)	($0.04)	($0.05)	($0.07)	($0.05)	$0.02	$0.01	($0.02)	($0.16)	$0.01	($0.22)	($0.04)	$0.02

FAIR_VALUE_Schedule_of_Fair_Va

FAIR VALUE (Schedule of Fair Value of Money Market Funds) (Details) (Fair Value, Inputs, Level 1 [Member], USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money market funds	$72,327	$60,496

FAIR_VALUE_Narrative_Details

FAIR VALUE (Narrative) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Convertible subordinated debt	$205
Fair Value, Inputs, Level 2 [Member]	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Estimated fair value of convertible subordinated debt	$200.20

INVENTORIES_Schedule_of_Manufa

INVENTORIES (Schedule of Manufacturing Inventories) (Details) (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Manufacturing inventories:	'	'
Finished goods	$22,002	$19,480
Work in process	1,611	8,633
Materials and purchased parts	20,008	24,962
Inventory, Net	$43,621	$53,075

INVENTORIES_Schedule_of_Servic

INVENTORIES (Schedule of Service Parts Inventories) (Details) (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Service parts inventories:	'	'
Finished goods	$18,331	$19,750
Component parts	9,412	15,618
Inventory, Parts and Components, Net of Reserves	$27,743	$35,368

INTANGIBLE_ASSETS_AND_GOODWILL2

INTANGIBLE ASSETS AND GOODWILL (Schedule of Intangible Assets) (Details) (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Intangible Assets Excluding Goodwill [Line Items]	'	'
Gross Amount	$290,390	$290,390
Accumulated Amortization	-284,250	-277,577
Net Amount	6,140	12,813
Purchased technology [Member]	'	'
Intangible Assets Excluding Goodwill [Line Items]	'	'
Gross Amount	180,613	180,613
Accumulated Amortization	-179,272	-178,168
Net Amount	1,341	2,445
Trademarks [Member]	'	'
Intangible Assets Excluding Goodwill [Line Items]	'	'
Gross Amount	3,900	3,900
Accumulated Amortization	-3,900	-3,900
Net Amount	'	'
Customer lists [Member]	'	'
Intangible Assets Excluding Goodwill [Line Items]	'	'
Gross Amount	105,719	105,719
Accumulated Amortization	-101,078	-95,509
Net Amount	4,641	10,210
In-process research and development [Member]	'	'
Intangible Assets Excluding Goodwill [Line Items]	'	'
Gross Amount	158	158
Accumulated Amortization	'	'
Net Amount	$158	$158

INTANGIBLE_ASSETS_AND_GOODWILL3

INTANGIBLE ASSETS AND GOODWILL (Schedule of Goodwill) (Details) (USD $)	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
INTANGIBLE ASSETS AND GOODWILL [Abstract]	'	'
Balance, Goodwill	$394,613	$394,613
Balance, Accumulated Impairment Losses	-339,000	-339,000
Balance, Net Amount	$55,613	$55,613

INTANGIBLE_ASSETS_AND_GOODWILL4

INTANGIBLE ASSETS AND GOODWILL (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
INTANGIBLE ASSETS AND GOODWILL [Abstract]	'	'	'	'
Amortization of Intangible Assets	$2.20	$2.80	$6.70	$11.10

ACCRUED_WARRANTY_Schedule_of_C

ACCRUED WARRANTY (Schedule of Change in Accrued Warranty Balance) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
ACCRUED WARRANTY [Abstract]	'	'	'	'
Beginning balance	$6,489	$7,904	$7,520	$7,586
Additional warranties issued	2,018	2,037	5,947	7,240
Adjustments for warranties issued in prior fiscal years	82	364	'	954
Settlements	-2,462	-2,559	-7,340	-8,034
Ending balance	$6,127	$7,746	$6,127	$7,746

RESTRUCTURING_CHARGES_Schedule

RESTRUCTURING CHARGES (Schedule of Restructuring Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
RESTRUCTURING CHARGES [Abstract]	'	'	'	'
Severance and benefits	$1,645	$6,363	$4,236	$6,363
Facilities	41	239	129	239
Other	360	'	537	'
Total	$2,046	$6,602	$4,902	$6,602

RESTRUCTURING_CHARGES_Schedule1

RESTRUCTURING CHARGES (Schedule of Accrued Restructuring) (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]	'	'
Balance	$5,108	$4,756
Restructuring costs	2,235	6,039
Restructuring charge reversal	-189	-1,137
Cash payments	-2,096	-4,600
Balance	5,058	5,058
Severance and Benefits [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Balance	3,125	2,711
Restructuring costs	1,834	5,373
Restructuring charge reversal	-189	-1,137
Cash payments	-1,659	-3,836
Balance	3,111	3,111
Facilities [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Balance	1,896	2,045
Restructuring costs	41	129
Restructuring charge reversal	'	'
Cash payments	-130	-367
Balance	1,807	1,807
Other [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Balance	87	'
Restructuring costs	360	537
Restructuring charge reversal	'	'
Cash payments	-307	-397
Balance	$140	$140

RESTRUCTURING_CHARGES_Schedule2

RESTRUCTURING CHARGES (Schedule of Estimated Timing of Future Payouts) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Estimated timing of future payouts:	'
Estimated timing of future payouts:	$5,058
Severance and Benefits [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	3,111
Facilities [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	1,807
Other [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	140
Next twelve months [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	3,554
Next twelve months [Member] | Severance and Benefits [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	3,111
Next twelve months [Member] | Facilities [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	303
Next twelve months [Member] | Other [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	140
January 2015 through February 2021 [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	1,504
January 2015 through February 2021 [Member] | Severance and Benefits [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	'
January 2015 through February 2021 [Member] | Facilities [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	1,504
January 2015 through February 2021 [Member] | Other [Member]	'
Estimated timing of future payouts:	'
Estimated timing of future payouts:	'

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, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Share-based compensation:	'	'	'	'
Share-based compensation	$3,421	$3,716	$10,268	$11,729
Cost of revenue [Member]	'	'	'	'
Share-based compensation:	'	'	'	'
Share-based compensation	509	626	1,560	1,839
Research and development [Member]	'	'	'	'
Share-based compensation:	'	'	'	'
Share-based compensation	862	925	2,638	2,772
Selling and marketing [Member]	'	'	'	'
Share-based compensation:	'	'	'	'
Share-based compensation	994	1,273	3,148	3,603
General and administrative [Member]	'	'	'	'
Share-based compensation:	'	'	'	'
Share-based compensation	$1,056	$892	$2,922	$3,515

STOCK_INCENTIVE_PLANS_AND_SHAR3

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Share-based Compensation by Type of Award) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Share-based compensation by type of award:	'	'	'	'
Stock options	$207	$239	$647	$1,445
Restricted stock	2,923	2,986	8,629	8,767
Stock purchase plan	291	491	992	1,517
Share-based compensation:	$3,421	$3,716	$10,268	$11,729

STOCK_INCENTIVE_PLANS_AND_SHAR4

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Restricted Stock) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
					Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]
							Vesting Date One [Member]	Vesting Date Two [Member]	Vesting Date Three [Member]
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION [Abstract]	'	'	'	'	'	'	'	'	'
Weighted-average grant date fair values of restricted stock units granted	$1.25	$1.44	$1.40	$1.99	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'
Granted	'	'	'	'	0.2	0.8	'	'	'
Fair value	'	'	'	'	$0.20	'	'	'	'
Model used to estimate fair value	'	'	'	'	'Monte Carlo	'	'	'	'
Expected volatility rate	'	'	'	'	66.00%	'	'	'	'
Risk free interest rate	'	'	'	'	0.50%	'	'	'	'
Expected term	'	'	'	'	'	'	'10 months	'22 months	'34 months
Estimated fair value	'	'	'	'	$0.70	'	'	'	'

STOCK_INCENTIVE_PLANS_AND_SHAR5

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Stock Purchase Plan Fair Value Assumptions) (Details) (Stock Purchase Plan [Member], USD $)	9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Stock Purchase Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Option life	'6 months	'6 months
Risk-free interest rate	0.07%	0.15%
Stock price volatility	47.65%	74.81%
Weighted-average grant date fair value	$0.47	$0.51

STOCK_INCENTIVE_PLANS_AND_SHAR6

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, 2013
Options	'
Outstanding as of March 31, 2013	16,050
Exercised	-535
Forfeited	-1,108
Expired	-3,011
Outstanding as of December 31, 2013	11,396
Vested and expected to vest at December 31, 2013	11,369
Exercisable as of December 31, 2013	10,944
Weighted-Average Exercise Price	'
Outstanding as of March 31, 2013	$2.14
Exercised	$0.99
Forfeited	$2.20
Expired	$2.07
Outstanding as of December 31, 2013	$2.21
Vested and expected to vest at December 31, 2013	$2.20
Exercisable as of December 31, 2013	$2.19
Weighted-Average Remaining Contractual Term	'
Outstanding as of December 31, 2013	'1 year 7 months 28 days
Vested and expected to vest at December 31, 2013	'1 year 7 months 28 days
Exercisable as of December 31, 2013	'1 year 6 months 22 days
Aggregate Intrinsic Value	'
Outstanding as of December 31, 2013	$1,031
Vested and expected to vest at December 31, 2013	1,031
Exercisable as of December 31, 2013	$1,027

STOCK_INCENTIVE_PLANS_AND_SHAR7

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Restricted Stock Activity) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Shares	'	'	'	'
Nonvested at March 31, 2013	'	'	9,887	'
Granted	'	'	7,751	'
Vested	'	'	-4,241	'
Forfeited	'	'	-1,041	'
Nonvested at December 31, 2013	12,356	'	12,356	'
Weighted-Average Grant Date Fair Value	'	'	'	'
Nonvested at March 31, 2013	'	'	$2.43	'
Granted	$1.25	$1.44	$1.40	$1.99
Vested	'	'	$2.40	'
Forfeited	'	'	$2.06	'
Nonvested at December 31, 2013	$1.83	'	$1.83	'

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
INCOME TAXES [Abstract]	'	'	'	'
Income tax provision	$308	$348	$1,232	$1,217

NET_LOSS_PER_SHARE_Computation

NET 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, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
NET LOSS PER SHARE [Abstract]	'	'	'	'
Net loss	($2,415)	($8,173)	($6,982)	($37,127)
Weighted average basic and diluted shares	248,135	240,786	246,183	239,099
Basic and diluted net loss per share	($0.01)	($0.04)	($0.03)	($0.16)

NET_LOSS_PER_SHARE_Narrative_D

NET LOSS PER SHARE (Narrative) (Details)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Stock Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	11.5	16.4	13.8	17.7
Unvested restricted stock units [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	11.5	10.7	10.7	10.1
3.50% convertible subordinated notes [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	31.2	31.2	31.2	31.2
Convertible subordinated notes, interest rate	3.50%	3.50%	3.50%	3.50%
4.50% convertible subordinated notes [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	42.5	28.5	42.5	9.4
Convertible subordinated notes, interest rate	4.50%	4.50%	4.50%	4.50%