PIPE TRANSACTION Calculation of Carrying Value of Preferred Stock (Details) - USD ($) $ in Thousands	Mar. 09, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Temporary Equity [Line Items]
Issuance date liquidation preference		$ 64,758
Initial carrying value of Series A Preferred Stock		57,988		$ 0
Payment of Financing and Stock Issuance Costs	$ 4,000
PIPE Warrants [Member]
Temporary Equity [Line Items]
Payment of Financing and Stock Issuance Costs	200
Series A Preferred Stock
Temporary Equity [Line Items]
Issuance date liquidation preference	62,500
Initial carrying value of Series A Preferred Stock	52,380	$ 57,988	$ 52,380
Payment of Financing and Stock Issuance Costs	3,800
Warrant Value | Series A Preferred Stock
Temporary Equity [Line Items]
Discount on issuance	(3,145)
Beneficial Conversion Feature | Series A Preferred Stock
Temporary Equity [Line Items]
Discount on issuance	(3,145)
Issuance Costs | Series A Preferred Stock
Temporary Equity [Line Items]
Discount on issuance	$ (3,830)