Note 5 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jul. 31, 2015
Intangibles, gross	$ 12,729	$ 12,729
Intangibles, accumulated amortization	(6,333)	(4,754)
Intangibles, net	$ 6,396	7,975
Intangible, weighted average useful life (Year)	6 years 146 days
Trade Names [Member]
Intangibles, gross	$ 2,900	2,900
Intangibles, accumulated amortization	(709)	(515)
Intangibles, net	$ 2,191	2,385
Intangible, weighted average useful life (Year)	11 years 109 days
Customer Lists [Member]
Intangibles, gross	$ 3,300	3,300
Intangibles, accumulated amortization	(2,420)	(1,760)
Intangibles, net	$ 880	1,540
Intangible, weighted average useful life (Year)	1 year 109 days
Operating Rights [Member]
Intangibles, gross	$ 6,529	6,529	$ 6,500
Intangibles, accumulated amortization	(3,204)	(2,479)
Intangibles, net	$ 3,325	$ 4,050
Intangible, weighted average useful life (Year)	4 years 219 days