Note 8 - Long-lived Assets - Cost Basis, Accumulated Amortization and Net Book Value of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Intangible assets, cost basis	$ 25,248	$ 25,248
Intangible assets, accumulated amortization	(15,592)	(14,928)
Intangible assets, net	$ 2,064	$ 2,728
Intangible assets, remaining weighted average amortization period (Year)	3 years 3 months 18 days	4 years 3 months 18 days
Intangible assets, accumulated impairment charges	$ (7,592)	$ (7,592)
Noncompete Agreements [Member]
Intangible assets, cost basis	170	170
Intangible assets, accumulated amortization	(170)	(167)
Intangible assets, net		$ 3
Intangible assets, remaining weighted average amortization period (Year)		1 month 6 days
Customer Relationships [Member]
Intangible assets, cost basis	15,979	$ 15,979
Intangible assets, accumulated amortization	(7,842)	(7,581)
Intangible assets, net	$ 545	$ 806
Intangible assets, remaining weighted average amortization period (Year)	2 years 1 month 6 days	3 years 1 month 6 days
Intangible assets, accumulated impairment charges	$ (7,592)	$ (7,592)
Trade Names [Member]
Intangible assets, cost basis	9,099	9,099
Intangible assets, accumulated amortization	(7,580)	(7,180)
Intangible assets, net	$ 1,519	$ 1,919
Intangible assets, remaining weighted average amortization period (Year)	3 years 9 months 18 days	4 years 9 months 18 days