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FAIR VALUE Narratives (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2016 shares | Dec. 31, 2016 simulation $ / shares shares | Dec. 31, 2015 shares | Jul. 07, 2015 $ / shares | Jan. 24, 2013 $ / shares
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Common stock warrants issued (in shares) |  | 3,055,555 | 3,466,841 |  |
Share price (in usd per share) | $ / shares |  |  |  | $ 1.42 | $ 6.00
Percentage of simulated equity values below the down-round financing cut-off point |  | 25.00% |  |  |
Number of independent simulations | simulation |  | 10 |  |  |
Simulation period |  | 6 months |  |  |
Underlying Shares |  | 6,696,287 |  |  |
2012 Warrant Liability |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Common stock warrants issued (in shares) |  | 3,400,000 |  |  |
Share price (in usd per share) | $ / shares |  | $ 0.28 |  |  |
Stock options, fair value assumptions, expected life |  | 1 month 7 days |  |  |
Volatility |  | 67.00% |  |  |
Risk-free interest rate |  | 0.44% |  |  |
Term of U.S. treasury bond |  | 1 year |  |  |
2016 Warrant Liability |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Common stock warrants issued (in shares) | 1,800,000 |  |  |  |
Share price (in usd per share) | $ / shares |  | $ 0.28 |  |  |
Risk-free interest rate |  | 1.70% |  |  |
Underlying Shares |  | 800,000 |  |  |
Volatility Rate |  | 91.00% |  |  |

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