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Note 4 - Balance Sheet Components (Details Textual) - USD ($)
12 Months Ended
Jan. 03, 2022
Jan. 02, 2022
Jan. 03, 2021
Dec. 29, 2019
Depreciation, Amortization and Accretion, Net, Total   $ 626,000 $ 817,000 $ 1,201,000
Interest Costs Capitalized   $ 0    
Capitalized Computer Software, Amortization $ 458,000   $ 148,000