Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Revenues	$ 12,455	$ 24,181	$ 24,151	$ 47,267
Cost and operating expenses:
Cost of revenues	13,773	22,611	25,860	40,598
Research and development	3,078	3,083	6,198	6,110
Selling, general and administrative	8,046	8,682	15,984	19,508
Arbitration award expense	10,188		10,188
Restructuring and impairments	3,731	751	4,909	764
Amortization of acquisition related intangibles	39	82	79	164
Total cost and operating expenses	38,855	35,209	63,218	67,144
Operating loss	(26,400)	(11,028)	(39,067)	(19,877)
Change in fair value of derivatives and warrants	795	886	760	1,355
Interest expense, net	(496)	(3,505)	(1,030)	(5,617)
Other income (expense), net	740	(635)	588	(566)
Loss before income tax expense	(25,361)	(14,282)	(38,749)	(24,705)
Income tax expense	62	341	190	430
Net loss	$ (25,423)	$ (14,623)	$ (38,939)	$ (25,135)
Net loss per common share
Basic	$ (0.31)	$ (0.24)	$ (0.49)	$ (0.42)
Diluted	$ (0.31)	$ (0.24)	$ (0.49)	$ (0.42)
Weighted average number of common shares outstanding
Basic	81,471	61,116	79,590	59,712
Diluted	81,471	61,116	79,590	59,712