Note 6 - Goodwill, Other Intangibles, and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Gross	$ 32,600	$ 32,600
Finite-Lived Intangible Assets, Accumulated Amortization	(12,125)	(8,082)
Finite-Lived Intangible Assets, Net	$ 20,475	$ 24,518
Finite-Lived Intangible Asset, Useful Life (Month)	102 months	105 months
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 4,400	$ 4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(3,900)	(2,206)
Finite-Lived Intangible Assets, Net	500	$ 2,194
Finite-Lived Intangible Asset, Useful Life (Month)		9 months
Trade Names [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	2,402	$ 2,402
Finite-Lived Intangible Assets, Accumulated Amortization	(2,130)	(1,204)
Finite-Lived Intangible Assets, Net	272	1,198
Trade Names [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(885)	(501)
Finite-Lived Intangible Assets, Net	114	498
Trade Names [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(885)	(501)
Finite-Lived Intangible Assets, Net	114	498
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	28,200	28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(8,225)	(5,876)
Finite-Lived Intangible Assets, Net	$ 19,975	$ 22,324
Finite-Lived Intangible Asset, Useful Life (Month)	102 months	114 months
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 14,072	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(4,104)	(2,931)
Finite-Lived Intangible Assets, Net	9,968	11,141
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,692	1,692
Finite-Lived Intangible Assets, Accumulated Amortization	(494)	(354)
Finite-Lived Intangible Assets, Net	1,198	1,338
Customer Relationships [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	12,436	12,436
Finite-Lived Intangible Assets, Accumulated Amortization	(3,627)	(2,591)
Finite-Lived Intangible Assets, Net	$ 8,809	$ 9,845