Note 7 - Long-lived Assets - Cost Basis, Accumulated Amortization and Net Book Value of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Intangible assets, cost basis	$ 25,248	$ 25,248
Intangible assets, accumulated amortization	(14,928)	(14,203)
Intangible assets, net	$ 2,728	$ 3,453
Intangible assets, remaining weighted average amortization period (Year)	4 years 3 months 18 days	5 years 2 months 12 days
Intangible assets, accumulated impairment charges	$ (7,592)	$ (7,592)
Noncompete Agreements [Member]
Intangible assets, cost basis	170	170
Intangible assets, accumulated amortization	(167)	(139)
Intangible assets, net	$ 3	$ 31
Intangible assets, remaining weighted average amortization period (Year)	1 month 6 days	1 year 1 month 6 days
Customer Relationships [Member]
Intangible assets, cost basis	$ 15,979	$ 15,979
Intangible assets, accumulated amortization	(7,581)	(7,284)
Intangible assets, net	$ 806	$ 1,103
Intangible assets, remaining weighted average amortization period (Year)	3 years 1 month 6 days	4 years
Intangible assets, accumulated impairment charges	$ (7,592)	$ (7,592)
Trade Names [Member]
Intangible assets, cost basis	9,099	9,099
Intangible assets, accumulated amortization	(7,180)	(6,780)
Intangible assets, net	$ 1,919	$ 2,319
Intangible assets, remaining weighted average amortization period (Year)	4 years 9 months 18 days	5 years 9 months 18 days