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INVESTMENTS - Activity in Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Investments rollforward    
Opening balance $ 1,885 $ 3,131
Additions/transfers during the period   2,314
Net (loss) on securities sold   4,523
Disposals/transfers during period   (8,819)
Unrealized (loss) on securities held   736
Fair Value end of the period   1,885
Marketable equity securities    
Investments rollforward    
Opening balance 1,885 2,718
Additions/transfers during the period   2,314
Net (loss) on securities sold (619) 3,396
Disposals/transfers during period $ (1,266) (7,279)
Unrealized (loss) on securities held   736
Fair Value end of the period   1,885
Warrants    
Investments rollforward    
Opening balance   413
Net (loss) on securities sold   1,127
Disposals/transfers during period   $ (1,540)