Note 12 - Goodwill and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Gross	$ 34,000	$ 34,000
Finite-Lived Intangible Assets, Accumulated Amortization	(8,330)	(4,385)
Finite-Lived Intangible Assets, Net	$ 25,670	$ 29,615
Finite-Lived Intangible Asset, Useful Life (Month)	106 months	128 months
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 4,400	$ 4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(1,642)	(440)
Finite-Lived Intangible Assets, Net	$ 2,758	$ 3,960
Finite-Lived Intangible Asset, Useful Life (Month)	12 months	162 months
Trade Names [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 2,402	$ 2,402
Finite-Lived Intangible Assets, Accumulated Amortization	(896)	(240)
Finite-Lived Intangible Assets, Net	1,506	2,162
Trade Names [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(373)	(100)
Finite-Lived Intangible Assets, Net	626	899
Trade Names [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(373)	(100)
Finite-Lived Intangible Assets, Net	626	899
Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Gross	1,400	1,400
Finite-Lived Intangible Assets, Accumulated Amortization	(1,400)	(420)
Finite-Lived Intangible Assets, Net	0	$ 980
Finite-Lived Intangible Asset, Useful Life (Month)		42 months
Noncompete Agreements [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	914	$ 914
Finite-Lived Intangible Assets, Accumulated Amortization	(914)	(274)
Finite-Lived Intangible Assets, Net	0	640
Noncompete Agreements [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	130	130
Finite-Lived Intangible Assets, Accumulated Amortization	(130)	(39)
Finite-Lived Intangible Assets, Net	0	91
Noncompete Agreements [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	356	356
Finite-Lived Intangible Assets, Accumulated Amortization	(356)	(107)
Finite-Lived Intangible Assets, Net	0	249
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	28,200	28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(5,288)	(3,525)
Finite-Lived Intangible Assets, Net	$ 22,912	$ 24,675
Finite-Lived Intangible Asset, Useful Life (Month)	117 months	126 months
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 14,072	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(2,638)	(1,759)
Finite-Lived Intangible Assets, Net	11,434	12,313
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,692	1,692
Finite-Lived Intangible Assets, Accumulated Amortization	(318)	(213)
Finite-Lived Intangible Assets, Net	1,374	1,479
Customer Relationships [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	12,436	12,436
Finite-Lived Intangible Assets, Accumulated Amortization	(2,332)	(1,554)
Finite-Lived Intangible Assets, Net	$ 10,104	$ 10,883