Note 3 - Revenue From Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 01, 2022	Jul. 02, 2022	Oct. 02, 2021	Jul. 03, 2021	Oct. 01, 2022	Oct. 02, 2021
Revenue	$ 172,509	$ 172,509	$ 131,911	$ 131,911	$ 484,396	$ 373,532
Percentage of revenue	100.00%		100.00%		100.00%	100.00%
UNITED STATES
Revenue	$ 22,918		$ 11,022		$ 61,992	$ 31,804
Percentage of revenue	13.00%		8.00%		13.00%	8.00%
Other Americas [Member]
Revenue	$ 236		$ 9,239		$ 4,984	$ 22,126
Percentage of revenue	0.00%		7.00%		1.00%	6.00%
Americas [Member]
Revenue	$ 23,154		$ 20,261		$ 66,976	$ 53,930
Percentage of revenue	13.00%		15.00%		14.00%	14.00%
CHINA
Revenue	$ 75,933		$ 76,692		$ 232,099	$ 208,632
Percentage of revenue	44.00%		58.00%		48.00%	56.00%
JAPAN
Revenue	$ 26,924		$ 7,877		$ 62,784	$ 24,490
Percentage of revenue	16.00%		6.00%		13.00%	6.00%
Other Asia [Member]
Revenue	$ 20,003		$ 14,328		$ 55,449	$ 50,620
Percentage of revenue	12.00%		11.00%		11.00%	14.00%
Asia [Member]
Revenue	$ 122,860		$ 98,897		$ 350,332	$ 283,742
Percentage of revenue	72.00%		75.00%		72.00%	76.00%
Europe [Member]
Revenue	$ 26,495		$ 12,753		$ 67,088	$ 35,860
Percentage of revenue	15.00%		10.00%		14.00%	10.00%
Product [Member] | Sales Channel, Through Intermediary [Member]
Revenue	$ 154,417		$ 118,227		$ 433,535	$ 328,174
Percentage of revenue	90.00%		90.00%		89.00%	88.00%
Product [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	$ 12,803		$ 9,190		$ 38,263	$ 33,371
Percentage of revenue	7.00%		7.00%		8.00%	9.00%
License and Service [Member]
Revenue	$ 5,289		$ 4,494		$ 12,598	$ 11,987
Percentage of revenue	3.00%		3.00%		3.00%	3.00%