Note 7 - Intangible Assets - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Intangible Assets, gross	$ 165,272	$ 138,297
Accumulated Amortization	(135,490)	(131,976)
Intangible Assets, net	$ 29,782	$ 6,321
Existing Technology [Member]
Useful life (Year)	5 years 1 month 6 days
Intangible Assets, gross	$ 124,487
Accumulated Amortization	(111,090)
Intangible Assets, net	$ 13,397
Developed Technology [Member]
Useful life (Year)		5 years
Intangible Assets, gross		$ 110,987
Accumulated Amortization		(109,162)
Intangible Assets, net		$ 1,825
Customer Relationships [Member]
Useful life (Year)	6 years 1 month 6 days	5 years 9 months 18 days
Intangible Assets, gross	$ 32,734	$ 22,934
Accumulated Amortization	(22,947)	(22,281)
Intangible Assets, net	$ 9,787	$ 653
Trademarks and Trade Names [Member]
Useful life (Year)	10 years
Intangible Assets, gross	$ 1,500
Accumulated Amortization	(19)
Intangible Assets, net	$ 1,481
Licensed Technology [Member]
Useful life (Year)	6 years 3 months 18 days	6 years 7 months 6 days
Intangible Assets, gross	$ 6,551	$ 4,376
Accumulated Amortization	(1,434)	(533)
Intangible Assets, net	$ 5,117	$ 3,843