FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value of the Company Financial Instruments that are Required to be Measured at Fair Value (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common stock warrant liability, warrants exercisable at $2.6058 from September 17, 2011 through September 17, 2016	$ 3,739
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common stock warrant liability, warrants exercisable at $2.6058 from September 17, 2011 through September 17, 2016	$ 3,739