Note 2 - Net Income Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Net income	$ 44,532	$ 21,838	$ 80,610	$ 40,651
Shares used in basic Net income per share (in shares)	137,424	136,388	137,462	136,394
Dilutive effect of stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition (in shares)	2,746	5,103	3,195	5,243
Shares used in diluted Net income per share (in shares)	140,170	141,491	140,657	141,637
Basic (in dollars per share)	$ 0.32	$ 0.16	$ 0.59	$ 0.30
Diluted (in dollars per share)	$ 0.32	$ 0.15	$ 0.57	$ 0.29
Stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition excluded as they are antidilutive (in shares)	558	124	442	96