Note 9 - Accrued Retirement Benefits - Net Periodic Cost (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Pensions and other benefits: | ||||
| Interest cost | $ 17 | $ 105 | $ 36 | $ 210 |
| Expected return on plan assets | 0 | (72) | 0 | (245) |
| Amortization of net loss | 3 | 0 | 5 | 79 |
| Settlement expense | 0 | 549 | 0 | 7,457 |
| Pension and other postretirement expenses | $ 20 | $ 582 | $ 41 | $ 7,501 |
| X | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. No definition available.
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| X | ||||||||||
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cost (reversal of cost) for pension and other postretirement benefits. No definition available.
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