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Marketable Equity Securities (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Marketable Equity Securities    
Marketable equity securities at cost $ 1,440 $ 1,440
Cumulative unrealized loss on marketable equity securities 266 (118)
Marketable equity securities at fair value $ 1,706 $ 1,322