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Marketable Equity Securities (Details 3) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Marketable Equity Securities        
Unrealized (loss) gain on marketable securities $ (227) $ (368) $ (102) $ (155)
Realized (loss) Gain On Marketable Equity Securities Sold 0 (78) 0 (159)
Net loss on marketable securities $ (227) $ (446) $ (102) $ (314)