Note D - Marketable Equity Securities - Securities Classified As Available-for-sale (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair market value | $ 38,732 | $ 48,488 |
| Cost | 18,271 | 28,211 |
| Unrealized gain | $ 20,461 | $ 20,277 |
| X | ||||||||||
- Definition The amount of accumulated unrealized gain (loss) on equity securities. No definition available.
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| X | ||||||||||
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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