Note 4 - Goodwill and Other Intangible Assets - Components of Definite and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Gross carrying amount	$ 114,094	$ 97,886
Accumulated amortization	41,729	35,197
Net carrying amount	72,365	62,689
Trademarks [Member]
Trademarks, gross	16,852	11,770
Trademarks, Accumulated amortization	40	40
Trademarks, Net carrying amount	16,812	11,730
Patents, Licenses and Technology [Member]
Gross carrying amount	38,885	38,845
Accumulated amortization	21,757	18,281
Net carrying amount	17,128	20,564
Customer Relationships [Member]
Gross carrying amount	55,656	44,588
Accumulated amortization	17,231	14,193
Net carrying amount	38,425	30,395
Noncompete Agreements [Member]
Gross carrying amount	2,701	2,683
Accumulated amortization	2,701	2,683
Net carrying amount