Note 5 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Property and equipment	$ 4,630	$ 4,378	$ 5,185
Less: accumulated depreciation and amortization	2,532	2,439	3,107
Property and equipment, net	2,098	1,939	2,078
Computers and Systems [Member]
Property and equipment	4,077	4,133	4,686
Equipment and Furniture [Member]
Property and equipment	220	86	264
Leasehold Improvements [Member]
Property and equipment	267	159	236
Laboratory Equipment [Member]
Property and equipment	$ 67	$ 0	$ 0

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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