Note 11 - Stock-based Compensation - Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Total stock-based compensation	$ 46,475	$ 40,372	$ 18,899
Cost of Sales [Member]
Total stock-based compensation	3,049	3,179	1,422
Research and Development Expense [Member]
Total stock-based compensation	14,563	10,124	5,640
Selling, General and Administrative Expenses [Member]
Total stock-based compensation	$ 28,863	$ 27,069	$ 11,837

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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