Note 2 - Net Income Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Net income	$ 36,078	$ 18,813
Shares used in basic Net income per share (in shares)	137,500	136,401
Dilutive effect of stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition (in shares)	3,781	5,273
Shares used in diluted Net income per share (in shares)	141,281	141,674
Basic (in dollars per share)	$ 0.26	$ 0.14
Diluted (in dollars per share)	$ 0.26	$ 0.13
Stock options, RSUs, ESPP shares, and equity awards with a market condition or performance condition excluded as they are antidilutive (in shares)	268	350