Note 14 - Information Concerning Product Lines, Geographic Information, Accounts Receivable and Revenue Concentration - Schedule of Revenue by Product Line (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Total revenue	[1]	$ 8,634	$ 10,310	$ 12,629
New Products [Member]
Total revenue	[1]	2,782	3,123	5,735
Mature Products [Member]
Total revenue	[1]	$ 5,852	$ 7,187	$ 6,894

[1] New products include all products manufactured on 180 nanometer or smaller semiconductor processes, eFPGA IP license, QuickAI and SensiML AI software as a service (SaaS) revenues. Mature products include all products produced on semiconductor processes larger than 180 nanometer.