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Description Of The Business And Basis Of Presentation (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended		0 Months Ended
	Sep. 30, 2012 employee	Sep. 30, 2011	Sep. 30, 2012 site employee	Sep. 30, 2011	Mar. 31, 2012	Jun. 05, 2012 Hercules Technology Growth Capital [Member]	Apr. 04, 2012 Capital Ventures International [Member]
Description Of Business [Line Items]
Cash, Restricted Cash, Cash Equivalents, Marketable Securities	$ 54,400,000		$ 54,400,000
Net loss	(15,949,000)	(51,709,000)	(26,224,000)	(89,388,000)	136,800,000
Cash used for operations			(23,171,000)	(106,896,000)	141,000,000
Reduction in global workforce, percentage			50.00%		50.00%
Number of workforce persons	445		445
Restructuring And Related Cost Number Of Facility Closures			3
Convertible notes							25,000,000
Percent of senior convertible notes							7.00%
Borrowed amount						$ 10,000,000

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