Note 5 - Goodwill, Other Intangible, and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Gross	$ 34,000	$ 34,000
Finite-Lived Intangible Assets, Accumulated Amortization	(4,385)	(1,462)
Finite-Lived Intangible Assets, Net	$ 29,615	$ 32,538
Finite-Lived Intangible Asset, Useful Life (Year)	10 years 240 days	11 years 240 days
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 4,400	$ 4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(440)	(147)
Finite-Lived Intangible Assets, Net	$ 3,960	$ 4,253
Finite-Lived Intangible Asset, Useful Life (Year)	162 years	14 years 180 days
Trade Names [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 2,402
Finite-Lived Intangible Assets, Accumulated Amortization	(240)
Finite-Lived Intangible Assets, Net	2,162
Trade Names [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,998
Finite-Lived Intangible Assets, Accumulated Amortization	(200)
Finite-Lived Intangible Assets, Net	1,798
Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Gross	1,400	$ 1,400
Finite-Lived Intangible Assets, Accumulated Amortization	(420)	(140)
Finite-Lived Intangible Assets, Net	$ 980	$ 1,260
Finite-Lived Intangible Asset, Useful Life (Year)	42 years	4 years 180 days
Noncompete Agreements [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 914
Finite-Lived Intangible Assets, Accumulated Amortization	(274)
Finite-Lived Intangible Assets, Net	640
Noncompete Agreements [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	486
Finite-Lived Intangible Assets, Accumulated Amortization	(146)
Finite-Lived Intangible Assets, Net	340
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	28,200	$ 28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(3,525)	(1,175)
Finite-Lived Intangible Assets, Net	$ 24,675	$ 27,025
Finite-Lived Intangible Asset, Useful Life (Year)	126 years	11 years 180 days
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(1,759)
Finite-Lived Intangible Assets, Net	12,313
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	14,128
Finite-Lived Intangible Assets, Accumulated Amortization	(1,766)
Finite-Lived Intangible Assets, Net	$ 12,362