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Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Cost Basis | $ 25,248 | $ 25,248
Accumulated Amortization | (14,387) | (14,203)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 3,269 | $ 3,453
Remaining Average Amortization Period (Year) | 5 years | 5 years 2 months 12 days
Noncompete Agreements [Member] |  |
Cost Basis | $ 170 | $ 170
Accumulated Amortization | (146) | (139)
Accumulated Impairment Charges | 0 | 0
Intangible assets, net | $ 24 | $ 31
Remaining Average Amortization Period (Year) | 9 months 18 days | 1 year 1 month 6 days
Customer Relationships [Member] |  |
Cost Basis | $ 15,979 | $ 15,979
Accumulated Amortization | (7,361) | (7,284)
Accumulated Impairment Charges | (7,592) | (7,592)
Intangible assets, net | $ 1,026 | $ 1,103
Remaining Average Amortization Period (Year) | 3 years 9 months 18 days | 4 years
Trade Names [Member] |  |
Cost Basis | $ 9,099 | $ 9,099
Accumulated Amortization | (6,880) | (6,780)
Accumulated Impairment Charges | 0 | 0
Intangible assets, net | $ 2,219 | $ 2,319
Remaining Average Amortization Period (Year) | 5 years 6 months | 5 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 https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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