Note 4 - Balance Sheet Components - Balance Sheet Components (Details) - USD ($) $ in Thousands		Jan. 01, 2023	Jan. 02, 2022
Trade account receivables		$ 2,707	$ 1,113
Less: Allowance for doubtful accounts		(18)	(62)
Accounts Receivable, after Allowance for Credit Loss, Total		2,689	1,051
Inventories:
Work-in-process		1,826	1,397
Finished goods		667	681
Inventory, Net, Total		2,493	2,078
Other current assets:
Prepaid expenses		1,305	921
Other		265	260
Prepaid Expense and Other Assets, Current		1,570	1,181
Property and equipment:
Property and equipment, gross		12,467	12,717
Accumulated depreciation and amortization		(12,002)	(12,218)
Property, Plant and Equipment, Net, Total		465	499
Capitalized internal-use software:
Capitalized software held for internal use		2,370	1,699
Accumulated amortization		(856)	(458)
Capitalized Computer Software, Net, Ending Balance		1,514	1,241
Accrued liabilities:
Accrued compensation		865	740
Accrued employee benefits		40	111
Accrued payroll tax		57	102
Other	[1]	547	712
Accrued Liabilities, Current, Total		1,509	1,665
Equipment [Member]
Property and equipment:
Property and equipment, gross		10,133	10,341
Software and Software Development Costs [Member]
Property and equipment:
Property and equipment, gross		1,803	1,878
Furniture and Fixtures [Member]
Property and equipment:
Property and equipment, gross		65	32
Leasehold Improvements [Member]
Property and equipment:
Property and equipment, gross		$ 466	$ 466

[1] Accrued liabilities-Other is partially comprised of a $100 non-cash lease adjustment offseting Other Assets in the six months ended July 3, 2022.