Note 6 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Cost Basis	$ 25,248	$ 25,248
Accumulated Amortization	(15,757)	(15,592)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 1,899	$ 2,064
Remaining Average Amortization Period (Year)	3 years 1 month 6 days	3 years 3 months 18 days
Noncompete Agreements [Member]
Cost Basis	$ 170	$ 170
Accumulated Amortization	(170)	(170)
Accumulated Impairment Charges	0	0
Intangible assets, net	0	0
Customer Relationships [Member]
Cost Basis	15,979	15,979
Accumulated Amortization	(7,907)	(7,842)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 480	$ 545
Remaining Average Amortization Period (Year)	1 year 9 months 18 days	2 years 1 month 6 days
Trade Names [Member]
Cost Basis	$ 9,099	$ 9,099
Accumulated Amortization	(7,680)	(7,580)
Accumulated Impairment Charges	0	0
Intangible assets, net	$ 1,419	$ 1,519
Remaining Average Amortization Period (Year)	3 years 6 months	3 years 9 months 18 days