Note 12 - Goodwill and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Gross	$ 64,600	$ 64,600
Finite-Lived Intangible Assets, Accumulated Amortization	(17,551)	(16,431)
Finite-Lived Intangible Assets, Net	$ 47,049	$ 48,169
Finite-Lived Intangible Asset, Useful Life (Month)	136 months	138 months
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 4,400	$ 4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(3,900)	(3,900)
Finite-Lived Intangible Assets, Net	500	500
Trade Names [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	2,402	2,402
Finite-Lived Intangible Assets, Accumulated Amortization	(2,130)	(2,130)
Finite-Lived Intangible Assets, Net	272	272
Trade Names [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(885)	(885)
Finite-Lived Intangible Assets, Net	114	114
Trade Names [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	999	999
Finite-Lived Intangible Assets, Accumulated Amortization	(885)	(885)
Finite-Lived Intangible Assets, Net	114	114
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	28,200	28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(11,163)	(10,575)
Finite-Lived Intangible Assets, Net	$ 17,037	$ 17,625
Finite-Lived Intangible Asset, Useful Life (Month)	87 months	90 months
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 14,072	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(5,570)	(5,277)
Finite-Lived Intangible Assets, Net	8,502	8,795
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,692	1,692
Finite-Lived Intangible Assets, Accumulated Amortization	(670)	(635)
Finite-Lived Intangible Assets, Net	1,022	1,057
Customer Relationships [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	12,436	12,436
Finite-Lived Intangible Assets, Accumulated Amortization	(4,923)	(4,663)
Finite-Lived Intangible Assets, Net	7,513	7,773
Credentialing [Member]
Finite-Lived Intangible Assets, Gross	32,000	32,000
Finite-Lived Intangible Assets, Accumulated Amortization	(2,488)	(1,956)
Finite-Lived Intangible Assets, Net	29,512	30,044
Credentialing [Member] | Expedited [Member]
Finite-Lived Intangible Assets, Gross	32,000	32,000
Finite-Lived Intangible Assets, Accumulated Amortization	(2,488)	(1,956)
Finite-Lived Intangible Assets, Net	$ 29,512	$ 30,044
Finite-Lived Intangible Asset, Useful Life (Month)	166 months	169 months