Note 6 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Cost Basis	$ 25,248	$ 25,248
Accumulated Amortization	(15,096)	(14,928)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 2,560	$ 2,728
Remaining Average Amortization Period (Year)	4 years 1 month 6 days	4 years 3 months 18 days
Noncompete Agreements [Member]
Cost Basis	$ 170	$ 170
Accumulated Amortization	(170)	(167)
Accumulated Impairment Charges	0	0
Intangible assets, net	0	$ 3
Remaining Average Amortization Period (Year)		1 month 6 days
Customer Relationships [Member]
Cost Basis	15,979	$ 15,979
Accumulated Amortization	(7,646)	(7,581)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 741	$ 806
Remaining Average Amortization Period (Year)	2 years 9 months 18 days	3 years 1 month 6 days
Trade Names [Member]
Cost Basis	$ 9,099	$ 9,099
Accumulated Amortization	(7,280)	(7,180)
Accumulated Impairment Charges	0	0
Intangible assets, net	$ 1,819	$ 1,919
Remaining Average Amortization Period (Year)	4 years 6 months	4 years 9 months 18 days