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Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Cost Basis | $ 25,248 | $ 25,248
Accumulated Amortization | (13,287) | (12,737)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 4,369 | $ 4,919
Remaining Average Amortization Period (Year) | 5 years 292 days | 6 years 182 days
Noncompete Agreements [Member] |  |
Cost Basis | $ 170 | $ 170
Accumulated Amortization | (104) | (83)
Accumulated Impairment Charges |  |
Intangible assets, net | $ 66 | $ 87
Remaining Average Amortization Period (Year) | 2 years 109 days | 3 years 36 days
Customer Relationships [Member] |  |
Cost Basis | $ 15,979 | $ 15,979
Accumulated Amortization | (6,903) | (6,674)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 1,484 | $ 1,713
Remaining Average Amortization Period (Year) | 5 years 36 days | 5 years 292 days
Trade Names [Member] |  |
Cost Basis | $ 9,099 | $ 9,099
Accumulated Amortization | (6,280) | (5,980)
Accumulated Impairment Charges |  |
Intangible assets, net | $ 2,819 | $ 3,119
Remaining Average Amortization Period (Year) | 7 years | 7 years 292 days

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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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