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Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Revenues $ 11,696 $ 23,086
Cost and operating expenses:    
Cost of revenues 12,087 17,987
Research and development 3,120 3,027
Selling, general and administrative 7,938 10,827
Restructuring and impairments 1,179 13
Amortization of acquisition related intangibles 39 82
Total cost and operating expenses 24,363 31,936
Operating loss (12,667) (8,850)
Change in fair value of derivatives and warrants (35) 469
Interest expense, net (535) (2,111)
Other (expense) income, net (152) 69
Loss before income tax expense (13,389) (10,423)
Income tax expense 128 90
Net loss $ (13,517) $ (10,513)
Net loss per common share    
Basic $ (0.17) $ (0.18)
Diluted $ (0.17) $ (0.18)
Weighted average number of common shares outstanding    
Basic 77,688 58,300
Diluted 77,688 58,300