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Unaudited Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Statement [Abstract]        
Revenues $ 19,004 $ 12,455 $ 42,727 $ 24,151
Cost and operating expenses:        
Cost of revenues 15,992 13,773 36,495 25,860
Research and development 3,003 3,078 6,165 6,198
Selling, general and administrative 6,773 8,046 14,308 15,984
Arbitration award expense   10,188   10,188
Restructuring and impairments 38 3,731 779 4,909
Amortization of acquisition related intangibles 39 39 78 79
Total operating expenses 25,845 38,855 57,825 63,218
Operating loss (6,841) (26,400) (15,098) (39,067)
Change in fair value of derivatives and warrants 701 795 1,501 760
Interest expense, net (286) (496) (603) (1,030)
Other (expense) income, net (397) 740 (1,169) 588
Loss before income tax expense (6,823) (25,361) (15,369) (38,749)
Income tax expense 875 62 1,450 190
Net loss $ (7,698) $ (25,423) $ (16,819) $ (38,939)
Net loss per common share        
Basic $ (0.57) $ (3.12) $ (1.31) $ (4.89)
Diluted $ (0.57) $ (3.12) $ (1.31) $ (4.89)
Weighted average number of common shares outstanding        
Basic 13,595 8,147 12,808 7,959
Diluted 13,595 8,147 12,808 7,959