Marketable Equity Securities (Details 1) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Marketable Equity Securities | ||
| Marketable equity securities at cost | $ 1,082 | $ 1,177 |
| Cumulative unrealized loss on marketable equity securities | 1,000 | 883 |
| Marketable equity securities at fair value | $ 82 | $ 294 |