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Note 14 - Commitments and Contingencies (Details Textual) - USD ($)
Sep. 29, 2019
Dec. 31, 2018
Standard and Extended Product Warranty Accrual, Ending Balance $ 571,000 $ 582,000
Accrual for Environmental Loss Contingencies, Ending Balance 0 $ 0
Purchase Obligation, Total $ 9,276,000