Note 15 - Retirement Fund and Profit Sharing Plan - Weighted Average Assumptions Used in Determining the Periodic Net Cost and Benefit Obligation (Details) - Supplemental Employee Retirement Plan [Member] |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Discount rate, net periodic benefit cost | 5.50% | 4.75% | 5.00% |
| Rate of compensation increase, net periodic benefit cost | 2.50% | 2.50% | 2.50% |
| Discount rate, benefit obligation | 5.25% | 5.50% | 4.75% |
| Rate of compensation increase, benefit obligation | 2.50% | 2.50% | 2.50% |
| X | ||||||||||
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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