Quarterly report pursuant to Section 13 or 15(d)

Underwritten and Registered Direct Placement of Common Stock (Details)

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Underwritten and Registered Direct Placement of Common Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Aug. 28, 2015
May. 06, 2014
Sep. 30, 2015
Sep. 30, 2014
Stockholders' Equity        
Issuance of common stock, net of issuance costs (in shares)   18,800,000 4,000,000  
Share price (in dollars per share)   $ 1.70    
Net proceeds from sale of the common stock, after deducting fees and other offering expenses (in dollars)   $ 29,800   $ 29,772
Aggregate offering price of common stock $ 30,000      
Proceeds from Issuance or Sale of Equity     $ 1,244