Note 4 - Investments - Net Investment Income (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Net investment income | $ 412 | $ 428 | $ 801 | $ 845 |
| Cash and Cash Equivalents [Member] | ||||
| Investment Income, Interest | 405 | 428 | 794 | 845 |
| Convertible Promissory Note Receivable [Member] | ||||
| Investment Income, Interest | $ 7 | $ 0 | $ 7 | $ 0 |
| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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