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Note 4 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets, Gross |  | $ 65,679 | $ 67,023
Total amortizable intangible assets |  | (32,782) | (29,753)
Finite-Lived Intangible Assets, Net |  | 32,897 | 37,270
Indefinite-lived intangible assets: |  | 254 | 1,135
Total intangible assets, Net |  | $ 33,151 | 38,405
Distribution Agreements/Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) | [1] | 8 years 9 months 18 days |
Finite-Lived Intangible Assets, Gross |  | $ 18,237 | 17,891
Total amortizable intangible assets |  | (7,746) | (6,340)
Finite-Lived Intangible Assets, Net |  | $ 10,491 | 11,551
Existing Technology [Member] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) | [1] | 5 years 2 months 12 days |
Finite-Lived Intangible Assets, Gross |  | $ 38,761 | 41,222
Total amortizable intangible assets |  | (20,674) | (19,698)
Finite-Lived Intangible Assets, Net |  | $ 18,087 | 21,524
Trade Names and Patents [Member] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) |  | 5 years 4 months 24 days |
Finite-Lived Intangible Assets, Gross |  | $ 8,681 | 7,910
Total amortizable intangible assets |  | (4,362) | (3,715)
Finite-Lived Intangible Assets, Net |  | $ 4,319 | $ 4,195
[1] | Weighted average life as of December 31, 2020.

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of 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 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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