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Marketable Equity Securities (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]        
Purchase of Vendetta shares $ 165 $ 0 $ 165 $ 0
Gross (loss) recorded in the statement of operations (347) (74) (736) (737)
Change in marketable equity securities at fair value $ (182) $ (74) $ (571) $ (737)