Note 12 - Information Concerning Product Lines, Geographic Information, and Revenue Concentration (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 02, 2024	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023	Dec. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax		$ 4,127	$ 2,921	$ 10,134	$ 7,054
Contract with Customer, Liability, Current		756		756		$ 1,052
UNITED STATES
Revenue from Contract with Customer, Excluding Assessed Tax		$ 3,400	$ 2,300	$ 8,300	$ 5,600
Percentage of Revenue		83.00%	80.00%	82.00%	80.00%
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	$ 1,900	$ 2,500		$ 6,600	$ 4,700
Professional Services [Member]
Contract with Customer, Asset, after Allowance for Credit Loss		2,300	$ 1,000	2,300	1,000
Contract with Customer, Liability, Current		$ 700	$ 300	$ 700	$ 300