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
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Net income	$ 7,190	$ 53,788	$ 44,617	$ 160,355
Shares used in basic Net income per share (in shares)	137,709	137,948	137,577	137,697
Dilutive effect of stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition (in shares)	185	1,880	697	2,230
Shares used in diluted Net income per share (in shares)	137,894	139,828	138,274	139,927
Basic (in dollars per share)	$ 0.05	$ 0.39	$ 0.32	$ 1.16
Diluted (in dollars per share)	$ 0.05	$ 0.38	$ 0.32	$ 1.15
Stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition excluded as they are antidilutive (in shares)	2,364	448	976	223