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Marketable Equity Securities (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]    
Cost of marketable equity securities sold $ 51 $ 0
Realized gain on marketable equity securities sold 25 0
Proceeds from the sale of marketable equity securities sold (76) 0
Net loss on marketable equity securities (208) (326)
Change in marketable equity securities at fair value $ (284) $ (326)