Note 5 - Revenue From Contracts With Customers 1 (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021	Dec. 31, 2021
Revenue, Remaining Performance Obligation, Amount	$ 78,327,000		$ 78,327,000
Contract with Customer, Liability, Total	15,774,000		15,774,000		$ 19,888,000
Contract with Customer, Liability, Revenue Recognized	4,464,000	$ 1,607,000	7,640,000	$ 3,609,000
Other Current Assets [Member]
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total	$ 2,343,000		$ 2,343,000		1,913,000
Accrued Liabilities [Member]
Contract with Customer, Liability, Current					15,013,000
Other Noncurrent Liabilities [Member]
Contract with Customer, Liability, Noncurrent					$ 4,875,000