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Note 7 - Long-lived Assets - Cost Basis, Accumulated Amortization and Net Book Value of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Intangible assets, cost basis | $ 25,248 | $ 25,248
Intangible assets, accumulated amortization | (13,470) | (12,737)
Intangible assets, net | $ 4,186 | $ 4,919
Intangible assets, remaining weighted average amortization period (Year) | 4 years 219 days | 6 years 182 days
Intangible assets, accumulated impairment charges | $ (7,592) | $ (7,592)
Noncompete Agreements [Member] |  |
Intangible assets, cost basis | 170 | 170
Intangible assets, accumulated amortization | (111) | (83)
Intangible assets, net | $ 59 | $ 87
Intangible assets, remaining weighted average amortization period (Year) | 2 years 36 days | 3 years 36 days
Customer Relationships [Member] |  |
Intangible assets, cost basis | $ 15,979 | $ 15,979
Intangible assets, accumulated amortization | (6,979) | (6,674)
Intangible assets, net | $ 1,408 | $ 1,713
Intangible assets, remaining weighted average amortization period (Year) | 4 years 328 days | 5 years 292 days
Intangible assets, accumulated impairment charges | $ (7,592) | $ (7,592)
Trade Names [Member] |  |
Intangible assets, cost basis | 9,099 | 9,099
Intangible assets, accumulated amortization | (6,380) | (5,980)
Intangible assets, net | $ 2,719 | $ 3,119
Intangible assets, remaining weighted average amortization period (Year) | 6 years 292 days | 7 years 292 days

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- Definition Accumulated amount of impairment charges of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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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- Definition 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 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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