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Note 11 - Commitments and Contingencies (Details Textual) - USD ($)
Oct. 02, 2022
Dec. 31, 2021
Standard and Extended Product Warranty Accrual, Ending Balance $ 679,000 $ 659,000
Accrual for Environmental Loss Contingencies, Ending Balance 0 $ 0
Inventories [Member]    
Purchase Obligation, Total 57,058,000  
Purchase Obligation, to be Paid, Remainder of Fiscal Year 15,224,000  
Purchase Obligation, to be Paid, Year One 31,884,000  
Purchase Obligation, to be Paid, Year Two 9,950,000  
Capital Addition Purchase Commitments [Member]    
Purchase Obligation, Total 1,261,000  
DOL [Member]    
Estimated Litigation Liability 525,000  
DOL [Member] | Minimum [Member]    
Loss Contingency, Estimate of Possible Loss 0  
DOL [Member] | Maximum [Member]    
Loss Contingency, Estimate of Possible Loss $ 108,000