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Marketable Equity Securities (Details 2) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Marketable Equity Securities (Tables)        
Cost Of Marketable Equity Securities Sold $ 0 $ 105 $ 212 $ 174
Realized (loss) Gain On Marketable Equity Securities Sold 0 (89) (159) (70)
Proceeds From The Sale Of Marketable Equity Securities Sold 0 (16) (53) (104)
Net (loss) Gain On Marketable Equity Securities 13 (39) (301) (290)
Change In Marketable Equity Securities At Fair Value $ 13 $ (55) $ (354) $ (394)