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