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Note 12 - Commitments and Contingencies (Details Textual) - USD ($)
Jul. 04, 2021
Dec. 31, 2020
Standard and Extended Product Warranty Accrual, Ending Balance $ 607,000 $ 638,000
Accrual for Environmental Loss Contingencies, Ending Balance 0 $ 0
Purchase Obligation, Total $ 21,445,000