Note 2 - Net Income Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 01, 2022	Jul. 02, 2022	Oct. 02, 2021	Jul. 03, 2021	Oct. 01, 2022	Oct. 02, 2021
Net income	$ 46,359	$ 46,359	$ 26,739	$ 26,739	$ 126,969	$ 67,390
Shares used in basic Net income per share (in shares)	137,267	137,267	136,638	136,638	137,397	136,476
Dilutive effect of stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition (in shares)	2,668		4,994		3,524	5,687
Shares used in diluted Net income per share (in shares)	139,935	139,935	141,632	141,632	140,921	142,163
Basic (in dollars per share)	$ 0.34	$ 0.34	$ 0.20	$ 0.20	$ 0.92	$ 0.49
Diluted (in dollars per share)	$ 0.33	$ 0.33	$ 0.19	$ 0.19	$ 0.90	$ 0.47
Stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition excluded as they are antidilutive (in shares)	604		358		535	182