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Marketable Equity Securities (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Marketable Equity Securities |  |
Cost of marketable equity securities sold | $ 0 | $ 264
Realized (loss) gain on marketable equity securities sold | 0 | (201)
Proceeds from the sale of marketable equity securities sold | 0 | 63
Net (loss) gain on marketable equity securities | 83 | (295)
Change in marketable equity securities at fair value | $ 83 | $ (358)

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