Note 5 - Property and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jan. 01, 2022
Property and Equipment	$ 163,963	$ 147,999
Accumulated depreciation and amortization	(116,349)	(109,905)
Property and Equipment, Net	47,614	38,094
Property, Plant and Equipment, Net	47,614	38,094
UNITED STATES
Property and Equipment, Net	29,118	26,509
Property, Plant and Equipment, Net	29,118	26,509
TAIWAN
Property and Equipment, Net	10,732	6,555
Property, Plant and Equipment, Net	10,732	6,555
PHILIPPINES
Property and Equipment, Net	3,596	2,498
Property, Plant and Equipment, Net	3,596	2,498
CHINA
Property and Equipment, Net	2,229	1,643
Property, Plant and Equipment, Net	2,229	1,643
Other [Member]
Property and Equipment, Net	1,939	889
Property, Plant and Equipment, Net	1,939	889
Foreign Countries [Member]
Property and Equipment, Net	18,496	11,585
Property, Plant and Equipment, Net	18,496	11,585
Production Equipment and Software [Member]
Property and Equipment	149,787	133,039
Leasehold Improvements [Member]
Property and Equipment	12,416	12,960
Office Equipment [Member]
Property and Equipment	$ 1,760	$ 2,000

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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