Note 13 - Information Concerning Product Lines, Geographic Information, Accounts Receivable and Revenue Concentration (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Revenue from Contract with Customer, Excluding Assessed Tax	$ 16,180	$ 12,685	$ 8,634
Contract with Customer, Liability, Current	272	455
Contract with Customer, Liability, Current	272	455
UNITED STATES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 10,600	$ 6,900	$ 5,000
Percentage of Revenue	67.00%	54.00%	58.00%
UNITED KINGDOM | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	10.00%
Non-US [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	1.00%	3.00%
New Products Related to Engineering Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 7,400	$ 1,500
SaaS Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax			$ 200
Engineering Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	2,000	300
Professional Services [Member]
Contract with Customer, Liability, Current	0	300
Contract with Customer, Liability, Current	$ 0	$ 300