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Note 5 - Revenue From Contracts With Customers 1 (Details Textual) - USD ($)
3 Months Ended
Apr. 03, 2022
Apr. 04, 2021
Dec. 31, 2021
Revenue, Remaining Performance Obligation, Amount $ 45,120,000    
Contract with Customer, Liability, Total 19,066,000   $ 19,888,000
Contract with Customer, Liability, Revenue Recognized 3,317,000 $ 2,255,000  
Other Current Assets [Member]      
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total 1,418,000   1,913,000
Accrued Liabilities [Member]      
Contract with Customer, Liability, Current 14,191,000   15,013,000
Other Noncurrent Liabilities [Member]      
Contract with Customer, Liability, Noncurrent $ 4,875,000   $ 4,875,000