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Note 4 - Balance Sheet Components - Balance Sheet Components (Details) - USD ($)
$ in Thousands
Apr. 03, 2022
Jan. 02, 2022
Inventories:    
Work-in-process $ 1,698 $ 1,397
Finished goods 594 681
Inventory, Net, Total 2,292 2,078
Other current assets:    
Prepaid taxes, royalties and other prepaid expenses 916 921
Other 203 260
Prepaid Expense and Other Assets, Current 1,119 1,181
Property and equipment, net:    
Property and equipment, gross 12,759 12,717
Less: Accumulated depreciation and amortization (12,260) (12,218)
Property, Plant and Equipment, Net, Total 499 499
Capitalized internal-use software, net:    
Capitalized internal-use software 1,837 1,699
Less: Accumulated amortization (546) (458)
Capitalized Computer Software, Net, Ending Balance 1,291 1,241
Accrued liabilities:    
Employee related accruals 1,069 953
Other 894 712
Accrued Liabilities, Current, Total 1,963 1,665
Equipment [Member]    
Property and equipment, net:    
Property and equipment, gross 10,383 10,341
Software [Member]    
Property and equipment, net:    
Property and equipment, gross 1,878 1,878
Furniture and Fixtures [Member]    
Property and equipment, net:    
Property and equipment, gross 32 32
Leasehold Improvements [Member]    
Property and equipment, net:    
Property and equipment, gross $ 466 $ 466