Note 2 - Net Income Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Net income	$ 178,882	$ 95,922	$ 47,392
Shares used in basic Net income per share (in shares)	137,321	136,619	135,220
Dilutive effect of stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition (in shares)	3,346	5,524	6,056
Shares used in diluted Net income per share (in shares)	140,667	142,143	141,276
Basic (in dollars per share)	$ 1.30	$ 0.70	$ 0.35
Diluted (in dollars per share)	$ 1.27	$ 0.67	$ 0.34
Stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition excluded as they are antidilutive (in shares)	472	638	646