Note 6 - Defined Benefit Pension Credit (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 27, 2026	Sep. 28, 2025	Sep. 27, 2026	Sep. 28, 2025
Pension and Other Postretirement Benefits, Refund on Surplus, Net	$ 10.4
Payment, Tax Withholding, Share-Based Payment Arrangement, Operating Activities	3.5
Pension and Other Postretirement Benefits, Refund on Surplus	13.9		$ 13.9	$ 0.0
Pension Plan [Member]
Defined Benefit Plan, Service Cost	0.1	$ 0.6	0.2	$ 1.8
Defined Benefit Plan, Buy-in Cost	$ 0.3		$ 0.4

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
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 715
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