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Marketable Equity Securities (Details 2) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Marketable Equity Securities        
Cost of marketable equity securities sold $ 0 $ 0 $ 0 $ 212
Realized (loss) gain on marketable equity securities sold 0 0 0 (159)
Proceeds from the sale of marketable equity securities sold 0 0 0 (53)
Net (loss) gain on marketable equity securities (141) 13 (39) (301)
Change in marketable equity securities at fair value $ (141) $ 13 $ (39) $ (354)