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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 7 Months Ended
May. 16, 2016
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Subsequent Event [Line Items]        
Aggregate proceeds from sales of common stock   $ 6,795 $ 0  
Stock Options [Member]        
Subsequent Event [Line Items]        
Options issued (in shares)   0    
ATM Agreement [Member]        
Subsequent Event [Line Items]        
Number of shares of common stock sold (in shares)   1,640,663   2,475,719
Aggregate proceeds from sales of common stock   $ 6,795   $ 10,383
Sales commissions, fees and other costs associated with issuance of common stock   $ 210   $ 311
Subsequent Event [Member] | ATM Agreement [Member]        
Subsequent Event [Line Items]        
Number of shares of common stock sold (in shares) 773,713      
Average sales price per common share (in dollars per share) $ 4.87      
Aggregate proceeds from sales of common stock $ 3,772      
Sales commissions, fees and other costs associated with issuance of common stock $ 113