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Note 11 - Commitments and Contingencies (Details Textual) - USD ($) | Jul. 03, 2022 | Dec. 31, 2021
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Standard and Extended Product Warranty Accrual, Ending Balance | $ 680,000 | $ 659,000
Accrual for Environmental Loss Contingencies, Ending Balance | 0 | $ 0
Inventories [Member] |  |
Purchase Obligation, Total | 60,104,000 |
Purchase Obligation, to be Paid, Remainder of Fiscal Year | 21,558,000 |
Purchase Obligation, to be Paid, Year One | 28,339,000 |
Purchase Obligation, to be Paid, Year Two | 10,207,000 |
Capital Addition Purchase Commitments [Member] |  |
Purchase Obligation, Total | $ 1,774,000 |

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