Note 9 - Accrued Retirement Benefits - Accrued Retirement Benefits (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Accrued retirement benefits | $ (1,609) | $ (1,620) |
| Less current portion | 1,609 | 1,620 |
| Non-current portion of accrued retirement benefits | 0 | 0 |
| Pension Plan [Member] | Qualified Plan [Member] | ||
| Accrued retirement benefits | (0) | (0) |
| Supplemental Employee Retirement Plan [Member] | Nonqualified Plan [Member] | ||
| Accrued retirement benefits | $ (1,609) | $ (1,620) |
| X | ||||||||||
- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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- Details
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| X | ||||||||||
- Details
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- Details
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