Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Revenue	$ 190,079	$ 161,372	$ 374,389	$ 311,887
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
CHINA
Revenue	$ 55,834	$ 80,735	$ 111,556	$ 156,166
Percentage of revenue	30.00%	50.00%	30.00%	50.00%
JAPAN
Revenue	$ 38,728	$ 16,957	$ 68,745	$ 35,860
Percentage of revenue	20.00%	10.00%	18.00%	12.00%
Other Asia [Member]
Revenue	$ 24,461	$ 21,028	$ 44,477	$ 35,446
Percentage of revenue	13.00%	13.00%	12.00%	11.00%
Asia [Member]
Revenue	$ 119,023	$ 118,720	$ 224,778	$ 227,472
Percentage of revenue	63.00%	73.00%	60.00%	73.00%
Americas [Member]
Revenue	$ 32,668	$ 22,282	$ 74,571	$ 43,822
Percentage of revenue	17.00%	14.00%	20.00%	14.00%
Europe [Member]
Revenue	$ 38,388	$ 20,370	$ 75,040	$ 40,593
Percentage of revenue	20.00%	13.00%	20.00%	13.00%
Product [Member] | Sales Channel, Through Intermediary [Member]
Revenue	$ 169,362	$ 143,705	$ 330,708	$ 279,118
Percentage of revenue	89.00%	89.00%	88.00%	90.00%
Product [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	$ 20,717	$ 17,667	$ 43,681	$ 32,769
Percentage of revenue	11.00%	11.00%	12.00%	10.00%