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Note 5 - Goodwill and Other Intangible Assets - Components of Identifiable Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Gross carrying value $ 74,243 $ 74,243
Accumulated amortization 20,013 15,338
Net carrying value 54,230 58,905
Product Technology and Intellectual Property [Member]    
Gross carrying value 29,951 29,951
Accumulated amortization 10,167 7,947
Net carrying value 19,784 22,004
Trademarks, Tradenames and Licenses [Member]    
Gross carrying value 4,000 4,000
Accumulated amortization 1,398 1,094
Net carrying value 2,602 2,906
Customer Relationships [Member]    
Gross carrying value 38,525 38,525
Accumulated amortization 7,352 5,424
Net carrying value 31,173 33,101
Other Intangible Assets [Member]    
Gross carrying value 1,767 1,767
Accumulated amortization 1,096 873
Net carrying value $ 671 $ 894