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FAIR VALUE MEASUREMENTS. (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) Segments shares | Dec. 31, 2018 shares | Dec. 31, 2017 shares
Original Issuance | Dec. 22, 2019 |  |
Term (years) | 3 years |  |
Warrants Outstanding | shares | 5,500 |  | 4
Fair Value | $ | $ 977,000 |  |
Measurement Input, Exercise Price [Member] |  |  |
Warrants and Rights Outstanding, Measurement Input | 1.00 |  |
Measurement Input, Price Volatility [Member] |  |  |
Warrants and Rights Outstanding, Measurement Input | 76.0 |  |
Measurement Input, Risk Free Interest Rate [Member] |  |  |
Warrants and Rights Outstanding, Measurement Input | 1.66 |  |

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