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Note 5 - Property and Equipment (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Write Off of Fully Depreciated Property and Equipment | $ 901 | $ 1,671 | $ 1,529
Depreciation, Total | $ 995 | 1,007 | $ 1,065
Canadian Power Systems [Member] |  |  |
Disposal Group, Including Discontinued Operation, Assets, Total |  | $ 713 |

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