Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified		Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Balance, beginning of period at Mar. 31, 2011		$ 261,810	$ 637	$ 5,891,036	$ (1,597)	$ (5,628,266)
Balance, shares, beginning of period at Mar. 31, 2011			63,666
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock		3,873	27	3,846
Issuance of common stock, shares			2,727
Repurchase of common stock		(20,852)	(35)	(20,817)
Repurchase of common stock, shares			(3,487)
Funding of structured stock repurchase agreements		(10,000)	(10)	(9,990)
Funding of structured stock repurchase agreements, shares			(1,027)
Stock-based compensation expense	[1]	17,261		17,261
Other comprehensive (loss) gain		(168)			(168)
Net loss		(82,688)				(82,688)
Balance, end of period at Mar. 31, 2012		169,236	619	5,881,336	(1,765)	(5,710,954)
Balance, shares, end of period at Mar. 31, 2012			61,879
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock		22,441	62	22,379
Issuance of common stock, shares			6,199
Repurchase of common stock		(653)	(1)	(652)
Repurchase of common stock, shares			(126)
Stock-based compensation expense	[1]	23,567		23,567
Other comprehensive (loss) gain		1,028			1,028
Net loss		(134,115)				(134,115)
Balance, end of period at Mar. 31, 2013		81,504	680	5,926,630	(737)	(5,845,069)
Balance, shares, end of period at Mar. 31, 2013			67,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock		62,920	97	62,823
Issuance of common stock, shares			9,725
Stock-based compensation expense	[1]	15,912		15,912
Other comprehensive (loss) gain		(5,406)			(5,406)
Net loss		(5,694)				(5,694)
Balance, end of period at Mar. 31, 2014		$ 149,236	$ 777	$ 6,005,365	$ (6,143)	$ (5,850,763)
Balance, shares, end of period at Mar. 31, 2014			77,677

[1] Veloce’s stock-based compensation expense related to warrants is included in issuance of common stock.