Note 3 - Revenue From Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Revenue	$ 184,310	$ 150,515
Percentage of revenue	100.00%	100.00%
CHINA
Revenue	$ 55,722	$ 75,431
Percentage of revenue	30.00%	50.00%
JAPAN
Revenue	$ 30,017	$ 18,903
Percentage of revenue	16.00%	13.00%
Other Asia [Member]
Revenue	$ 20,016	$ 14,418
Percentage of revenue	11.00%	9.00%
Asia [Member]
Revenue	$ 105,755	$ 108,752
Percentage of revenue	57.00%	72.00%
Americas [Member]
Revenue	$ 41,903	$ 21,540
Percentage of revenue	23.00%	15.00%
Europe [Member]
Revenue	$ 36,652	$ 20,223
Percentage of revenue	20.00%	13.00%
Product [Member] | Sales Channel, Through Intermediary [Member]
Revenue	$ 161,346	$ 135,413
Percentage of revenue	88.00%	90.00%
Product [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	$ 22,964	$ 15,102
Percentage of revenue	12.00%	10.00%