Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Cost Basis	$ 25,248	$ 25,248
Accumulated Amortization	(13,287)	(12,737)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 4,369	$ 4,919
Remaining Average Amortization Period (Year)	5 years 292 days	6 years 182 days
Noncompete Agreements [Member]
Cost Basis	$ 170	$ 170
Accumulated Amortization	(104)	(83)
Accumulated Impairment Charges
Intangible assets, net	$ 66	$ 87
Remaining Average Amortization Period (Year)	2 years 109 days	3 years 36 days
Customer Relationships [Member]
Cost Basis	$ 15,979	$ 15,979
Accumulated Amortization	(6,903)	(6,674)
Accumulated Impairment Charges	(7,592)	(7,592)
Intangible assets, net	$ 1,484	$ 1,713
Remaining Average Amortization Period (Year)	5 years 36 days	5 years 292 days
Trade Names [Member]
Cost Basis	$ 9,099	$ 9,099
Accumulated Amortization	(6,280)	(5,980)
Accumulated Impairment Charges
Intangible assets, net	$ 2,819	$ 3,119
Remaining Average Amortization Period (Year)	7 years	7 years 292 days