Note 3 - Revenue From Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2025	Mar. 30, 2024
Revenue	$ 120,150	$ 140,815
Percentage of revenue	100.00%	100.00%
CHINA
Revenue	$ 57,135	$ 56,872
Percentage of revenue	48.00%	40.00%
JAPAN
Revenue	$ 12,954	$ 24,988
Percentage of revenue	11.00%	18.00%
Other Asia [Member]
Revenue	$ 7,652	$ 10,568
Percentage of revenue	6.00%	8.00%
Asia [Member]
Revenue	$ 77,741	$ 92,428
Percentage of revenue	65.00%	66.00%
Americas [Member]
Revenue	$ 29,997	$ 31,980
Percentage of revenue	25.00%	22.00%
Europe [Member]
Revenue	$ 12,412	$ 16,407
Percentage of revenue	10.00%	12.00%
Sales Channel, Through Intermediary [Member] | Product [Member]
Revenue	$ 94,337	$ 123,205
Percentage of revenue	79.00%	87.00%
Sales Channel, Directly to Consumer [Member] | Product [Member]
Revenue	$ 25,813	$ 17,610
Percentage of revenue	21.00%	13.00%