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Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Cost Basis | $ 25,248 | $ 25,248
Accumulated Amortization | (13,837) | (13,470)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 3,819 | $ 4,186
Remaining Average Amortization Period (Year) | 4 years 2 months 12 days | 4 years 7 months 6 days
Noncompete Agreements [Member] |  |
Cost Basis | $ 170 | $ 170
Accumulated Amortization | (125) | (111)
Accumulated Impairment Charges | 0 | 0
Intangible assets, net | $ 45 | $ 59
Remaining Average Amortization Period (Year) | 1 year 7 months 6 days | 2 years 1 month 6 days
Customer Relationships [Member] |  |
Cost Basis | $ 15,979 | $ 15,979
Accumulated Amortization | (7,132) | (6,979)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 1,255 | $ 1,408
Remaining Average Amortization Period (Year) | 4 years 4 months 24 days | 4 years 10 months 24 days
Trade Names [Member] |  |
Cost Basis | $ 9,099 | $ 9,099
Accumulated Amortization | (6,580) | (6,380)
Accumulated Impairment Charges | 0 | 0
Intangible assets, net | $ 2,519 | $ 2,719
Remaining Average Amortization Period (Year) | 6 years 3 months 18 days | 6 years 9 months 18 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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