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FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair value of the company financial instruments that are required to be measured at fair value (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Jun. 30, 2015
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, warrants exercisable at $2.6058 from September 18, 2011 through September 18, 2016 | $ 635 | $ 978
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, warrants exercisable at $2.6058 from September 18, 2011 through September 18, 2016 |  |
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, warrants exercisable at $2.6058 from September 18, 2011 through September 18, 2016 |  |
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 18, 2011 through September 18, 2016 | $ 635 | $ 978

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