Note 6 - Intangible Assets and Goodwill - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Intangible Assets, gross	$ 168,087	$ 165,848
Impairment	(13,929)	0	$ 0
Accumulated Amortization	(149,571)	(144,874)
Intangible Assets, net	4,587	20,974
Existing Technology [Member]
Intangible Assets, gross	124,487	124,487
Impairment	(7,473)	0
Accumulated Amortization	(117,014)	(115,085)
Intangible Assets, net	0	$ 9,402
Weighted Average Amortization (Year)		5 years 1 month 6 days
Customer Relationships [Member]
Intangible Assets, gross	32,734	$ 32,734
Impairment	(5,425)	0
Accumulated Amortization	(27,309)	(25,909)
Intangible Assets, net	0	$ 6,825
Weighted Average Amortization (Year)		6 years 1 month 6 days
Trademarks and Trade Names [Member]
Intangible Assets, gross	1,500	$ 1,500
Impairment	(1,031)	0
Accumulated Amortization	(469)	(319)
Intangible Assets, net	0	$ 1,181
Weighted Average Amortization (Year)		10 years
Licensed Technology [Member]
Intangible Assets, gross	9,366	$ 7,127
Impairment	0	0
Accumulated Amortization	(4,779)	(3,561)
Intangible Assets, net	$ 4,587	$ 3,566
Weighted Average Amortization (Year)	5 years 4 months 24 days	6 years 2 months 12 days