Note 3 - Revenue From Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Revenue	$ 161,372	$ 125,905	$ 311,887	$ 241,621
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
UNITED STATES
Revenue	$ 21,371	$ 11,672	$ 39,074	$ 20,782
Percentage of revenue	13.00%	9.00%	13.00%	9.00%
Other Americas [Member]
Revenue	$ 911	$ 6,154	$ 4,748	$ 12,887
Percentage of revenue	1.00%	5.00%	1.00%	5.00%
Americas [Member]
Revenue	$ 22,282	$ 17,826	$ 43,822	$ 33,669
Percentage of revenue	14.00%	14.00%	14.00%	14.00%
CHINA
Revenue	$ 80,735	$ 64,821	$ 156,166	$ 131,940
Percentage of revenue	50.00%	52.00%	50.00%	54.00%
JAPAN
Revenue	$ 16,957	$ 8,836	$ 35,860	$ 16,613
Percentage of revenue	10.00%	7.00%	12.00%	7.00%
Other Asia [Member]
Revenue	$ 21,028	$ 22,798	$ 35,446	$ 36,292
Percentage of revenue	13.00%	18.00%	11.00%	15.00%
Asia [Member]
Revenue	$ 118,720	$ 96,455	$ 227,472	$ 184,845
Percentage of revenue	73.00%	77.00%	73.00%	76.00%
Europe [Member]
Revenue	$ 20,370	$ 11,624	$ 40,593	$ 23,107
Percentage of revenue	13.00%	9.00%	13.00%	10.00%
Product [Member] | Sales Channel, Through Intermediary [Member]
Revenue	$ 143,705	$ 111,168	$ 279,118	$ 209,947
Percentage of revenue	89.00%	88.00%	90.00%	87.00%
Product [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	$ 13,895	$ 11,368	$ 25,460	$ 24,181
Percentage of revenue	9.00%	9.00%	8.00%	10.00%
License and Service [Member]
Revenue	$ 3,772	$ 3,369	$ 7,309	$ 7,493
Percentage of revenue	2.00%	3.00%	2.00%	3.00%