Note 13 - Stock-based Compensation - Schedule of Allocation of Recognized Period Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Total costs and expenses	$ 2,522	$ 2,035	$ 2,526
RSU and PRSU [Member]
Total costs and expenses	2,395	1,965	2,416
Employee Stock Purchase Plan [Member]
Total costs and expenses	127	70	110
Cost of Sales [Member]
Total costs and expenses	328	272	282
Research and Development Expense [Member]
Total costs and expenses	595	652	843
Selling, General and Administrative Expenses [Member]
Total costs and expenses	$ 1,599	$ 1,111	$ 1,401