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STOCKHOLDERS' DEFICIT - Calculation of Carrying Value of Warrants (Details)
$ in Thousands
Mar. 09, 2015
USD ($)
Class of Warrant or Right [Line Items]  
Payments of Stock Issuance Costs $ 4,000
PIPE Warrants  
Class of Warrant or Right [Line Items]  
Fair value allocated to PIPE Warrants 3,145
Discount related to issuance costs (203)
Carrying value of PIPE Warrants 2,942
Payments of Stock Issuance Costs 200
Series A Preferred Stock  
Class of Warrant or Right [Line Items]  
Payments of Stock Issuance Costs $ 3,800