Note 8 - Stock-based Compensation - Schedule of Allocation of Recognized Period Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Total costs and expenses	$ 586	$ 477	$ 1,301	$ 860
Cost of Sales [Member]
Total costs and expenses	88	117	166	173
Research and Development Expense [Member]
Total costs and expenses	158	91	342	176
Selling, General and Administrative Expenses [Member]
Total costs and expenses	$ 340	$ 269	$ 793	$ 511