Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentationtion (Details)

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Basis of Presentationtion (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Mar. 31, 2015
Mar. 31, 2014
Basis of Presentation            
Loss from operations $ (7,649) $ (6,355) $ (13,469) $ (13,030)    
Cash and cash equivalents 10,599 $ 40,793 10,599 $ 40,793 $ 32,221 $ 27,859
Cash and cash equivalents including restricted cash 15,600   15,600      
Cash and cash equivalents and restricted cash excluding outstanding credit facility $ 400   $ 400   $ 19,300