Note 9 - Stock-based Compensation - Stock-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Total stock-based compensation	$ 14,125	$ 10,454
Cost of Sales [Member]
Total stock-based compensation	935	666
Research and Development Expense [Member]
Total stock-based compensation	4,845	2,767
Selling, General and Administrative Expenses [Member]
Total stock-based compensation	$ 8,345	$ 7,021