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Nature Of The Business And Operations And Liquidity (Details) (USD $)	12 Months Ended			24 Months Ended			0 Months Ended
	Mar. 31, 2013 employee	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013 employee	Jun. 30, 2012	Mar. 31, 2010	Apr. 04, 2012 Senior Convertible Note [Member]	Jun. 05, 2012 Senior Secured Term Loan [Member]
Description Of Business [Line Items]
Cash and cash equivalents	$ 39,243,000	$ 46,279,000	$ 123,783,000	$ 39,243,000		$ 87,594,000
Cash used for operations	(45,271,000)	(141,042,000)	(22,821,000)
Payments to settle adverse purchase commitments	14,300,000
Debt, face amount					35,000,000		25,000,000	10,000,000
Accumulated deficit	(800,131,000)	(734,000,000)		(800,131,000)
Reduction of principle from conversion of shares	$ 9,600,000
Reduction in global workforce, percentage	19.00%			57.00%
Number of workforce persons	362			362
Interest rate percentage							7.00%

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