Note 5 - Acquired Intangible Assets and Goodwill - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Gross Carrying Amount	$ 69,292	$ 56,392
Accumulated Amortization	38,172	35,614
Patents [Member]
Gross Carrying Amount	24,715	24,715
Accumulated Amortization	24,270	24,068
Noncompete Agreements [Member]
Gross Carrying Amount	2,749	2,749
Accumulated Amortization	2,749	2,749
Customer Lists [Member]
Gross Carrying Amount	22,017	18,017
Accumulated Amortization	9,783	8,100
Trademarks [Member]
Gross Carrying Amount	18,636	9,736
Accumulated Amortization	802	266
Developed Technology Rights [Member]
Gross Carrying Amount	475	475
Accumulated Amortization	396	301
Licensing Agreements [Member]
Gross Carrying Amount	700	700
Accumulated Amortization	$ 172	$ 130