Note 14 - Information Concerning Product Lines, Geographic Information, and Revenue Concentration (Details Textual) $ in Thousands	3 Months Ended	12 Months Ended
	May 27, 2025 USD ($)	Dec. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)
Number of Reportable Segments		1
Revenue from Contract with Customer, Excluding Assessed Tax		$ 20,112	$ 21,198	$ 16,180
Contract with Customer, Asset, after Allowance for Credit Loss, Current		2,682	3,609
Contract with Customer, Liability, Current		454	1,052
UNITED STATES
Revenue from Contract with Customer, Excluding Assessed Tax		$ 16,900	$ 18,600	$ 10,600
Percentage of Revenue		84.00%	88.00%	67.00%
Non-US [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage		0.10%	0.40%
eFPGA Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 13,100	$ 16,600	$ 7,400
Engineering Services [Member]
Contract with Customer, Asset, after Allowance for Credit Loss		2,700	3,600	2,000
Contract with Customer, Asset, after Allowance for Credit Loss, Current		2,700
Contract with Customer, Liability, Current		500	1,100	300
Revenue, Remaining Performance Obligation, Amount		4,700
Engineering Services [Member] | Forecast [Member]
Contract with Customer, Liability, Revenue Recognized	$ 500
Professional Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		10,900	14,800	3,300
Contract with Customer, Asset, after Allowance for Credit Loss		2,600	3,600
Contract with Customer, Asset, after Allowance for Credit Loss, Current		$ 400	$ 1,100	$ 300