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Note 14 - Commitments and Contingencies (Details Textual) - USD ($)
Oct. 04, 2020
Dec. 31, 2019
Standard and Extended Product Warranty Accrual, Ending Balance $ 642,000 $ 569,000
Accrual for Environmental Loss Contingencies, Ending Balance 0 $ 0
Purchase Obligation, Total $ 10,170,000