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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