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FAIR VALUE (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 44 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2015 | Jan. 31, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | Sep. 29, 2015 | Jul. 07, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Common stock warrants issued (in shares) |  |  | 2,933,106 | 1,208,491 |  |
Share price (in dollars per share) |  |  | $ 0.58 |  |  | $ 1.42
Percentage of simulated equity values below the down-round financing cut-off point |  |  | 100.00% |  |  |
2012 Warrant Liability |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Common stock warrants issued (in shares) | 3,200,000 |  |  |  | 1,200,000 |
Stock options, fair value assumptions, expected life |  |  | 10 months 8 days |  |  |
Volatility (as a percent) |  |  | 93.00% |  |  |
Risk-free interest rate (as a percent) |  |  | 0.52% |  |  |
Fair value assumptions, expected term |  |  | 1 year |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance |  | $ 350 | $ 350 | $ 145 |  |
Total (gains) or losses: |  |  |  |  |  |
Recognized in earnings |  |  | (330) | 145 |  |
Balance at end of period |  |  | $ 20 | $ 290 |  |
2016 Warrant Liability |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Common stock warrants issued (in shares) |  | 1,800,000 |  |  |  |
Volatility (as a percent) |  |  | 135.00% |  |  |
Risk-free interest rate (as a percent) |  |  | 1.21% |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance |  | $ 0 | $ 0 |  |  |
Additions |  |  | 1,437 |  |  |
Total (gains) or losses: |  |  |  |  |  |
Recognized in earnings |  |  | (9) |  |  |
Balance at end of period |  |  | $ 1,446 |  |  |

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