Note 10 - Information Concerning Product Lines, Geographic Information, and Revenue Concentration (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022	Jan. 01, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	$ 6,665	$ 3,459	$ 13,719	$ 12,096
Contract with Customer, Liability, Current	333		333		$ 272
UNITED STATES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 6,000	$ 2,300	$ 11,700	$ 7,800
Percentage of Revenue	91.00%	67.00%	85.00%	64.00%
UNITED KINGDOM | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage					10.00%
eFPGA Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,800	$ 1,700
Professional Services [Member]
Contract with Customer, Asset, after Allowance for Credit Loss	4,000	1,500	$ 4,000	$ 1,500
Contract with Customer, Liability, Current	$ 304,000	$ 165,000	$ 304,000	$ 165,000