Note 5 - Goodwill and Other Intangible Assets - Components of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Gross carrying value	$ 74,243	$ 74,243
Accumulated amortization	18,466	15,338
Net carrying value	55,777	58,905
Product Technology and Intellectual Property [Member]
Gross carrying value	29,951	29,951
Accumulated amortization	9,435	7,947
Net carrying value	20,516	22,004
Trademarks, Tradenames and Licenses [Member]
Gross carrying value	4,000	4,000
Accumulated amortization	1,299	1,094
Net carrying value	2,701	2,906
Customer Relationships [Member]
Gross carrying value	38,525	38,525
Accumulated amortization	6,709	5,424
Net carrying value	31,816	33,101
Other Intangible Assets [Member]
Gross carrying value	1,767	1,767
Accumulated amortization	1,023	873
Net carrying value	$ 744	$ 894

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Name Accounting Standards Codification
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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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