Note 4 - Goodwill and Other Intangible Assets - Components of Definite and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Gross carrying amount	$ 114,986	$ 114,094
Accumulated amortization	49,197	41,729
Net carrying amount	65,789	72,365
Trademarks [Member]
Trademarks, gross	16,953	16,852
Trademarks, Accumulated amortization	40	40
Trademarks, Net carrying amount	16,913	16,812
Patents, Licenses and Technology [Member]
Gross carrying amount	39,056	38,885
Accumulated amortization	25,160	21,757
Net carrying amount	13,896	17,128
Customer Relationships [Member]
Gross carrying amount	56,261	55,656
Accumulated amortization	21,280	17,231
Net carrying amount	34,981	38,425
Noncompete Agreements [Member]
Gross carrying amount	2,716	2,701
Accumulated amortization	2,717	2,701
Net carrying amount	$ 1	$ 0