Note 8 - Pension and Other Postretirement Benefits - Schedule of Net Periodic Cost of Pension Plans (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 04, 2026 |
Mar. 29, 2025 |
|
| Pension Plan [Member] | ||
| Net service cost | $ 61 | $ 64 |
| Interest cost | 211 | 201 |
| Expected return on plan assets | (171) | (169) |
| Amortization of actuarial losses (gains) | 0 | 2 |
| Net periodic benefit cost | 101 | 98 |
| Other Postretirement Benefits Plan [Member] | ||
| Net service cost | 3 | 4 |
| Interest cost | 26 | 28 |
| Expected return on plan assets | 0 | 0 |
| Amortization of actuarial losses (gains) | (9) | (8) |
| Net periodic benefit cost | $ 20 | $ 24 |
| 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 | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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