Note 14 - Employee Benefit Plans - Net Periodic Benefit Cost Recognized in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 04, 2021	Apr. 05, 2020
Selling, general and administrative expenses	$ 1	$ 1
Other expense, net	187	248
Total	188	249
Selling, General and Administrative Expenses [Member]
Selling, general and administrative expenses	$ 1	$ 1

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Name:	us-gaap_DefinedBenefitPlanServiceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration