Note 4 - Balance Sheet Components - Balance Sheet Components (Details) - USD ($) $ in Thousands		Oct. 01, 2023	Jan. 01, 2023
Trade account receivables		$ 497	$ 2,707
Less: Allowance for doubtful accounts		(16)	(18)
Accounts Receivable, after Allowance for Credit Loss		481	2,689
Inventories:
Work-in-process		1,898	1,826
Finished goods		132	667
Inventory, Net		2,030	2,493
Prepaid expenses and other current assets:
Prepaid taxes		512	510
Deferred charges		414	295
Other prepaid taxes, royalties, and other prepaid expenses		636	500
Other		164	265
Prepaid Expense and Other Assets, Current		1,726	1,570
Property and equipment, net:
Property and equipment, gross		16,766	12,467
Less: Accumulated depreciation and amortization		(12,219)	(12,002)
Property, Plant and Equipment, Net		4,547	465
Capitalized internal-use software, net:
Capitalized internal-use software		2,921	2,370
Less: Accumulated amortization		(1,255)	(856)
Capitalized Computer Software, Net		1,666	1,514
Accrued liabilities:
Accrued compensation		1,293	865
Accrued employee benefits		117	40
Accrued payroll tax		81	57
Other		556	547
Accrued Liabilities, Current		2,047	1,509
Equipment [Member]
Property and equipment, net:
Property and equipment, gross		10,487	10,133
Tooling [Member]
Property and equipment, net:
Property and equipment, gross	[1]	3,862
Software and Software Development Costs [Member]
Property and equipment, net:
Property and equipment, gross		1,803	1,803
Furniture and Fixtures [Member]
Property and equipment, net:
Property and equipment, gross		65	65
Leasehold Improvements [Member]
Property and equipment, net:
Property and equipment, gross		$ 549	$ 466

[1] In Q2 2023, the Company capitalized $1.67 million related to tooling to be utilized under its long-term professional services contracts. The tooling will be depreciated over an estimated useful life of seven years.