Note 15 - Goodwill and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Gross	$ 123,560	$ 64,600
Finite-Lived Intangible Assets, Accumulated Amortization	(21,573)	(16,431)
Finite-Lived Intangible Assets, Net	$ 101,987	$ 48,169
Finite-Lived Intangible Asset, Useful Life (Month)	154 months	138 months
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 6,590	$ 4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(3,988)	(3,900)
Finite-Lived Intangible Assets, Net	$ 2,602	500
Finite-Lived Intangible Asset, Useful Life (Month)	113 months
Trade Names [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 4,502	2,402
Finite-Lived Intangible Assets, Accumulated Amortization	(2,216)	(2,130)
Finite-Lived Intangible Assets, Net	2,286	272
Trade Names [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,089	999
Finite-Lived Intangible Assets, Accumulated Amortization	(887)	(885)
Finite-Lived Intangible Assets, Net	202	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
Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Gross	5,050
Finite-Lived Intangible Assets, Accumulated Amortization	(494)
Finite-Lived Intangible Assets, Net	$ 4,556
Finite-Lived Intangible Asset, Useful Life (Month)	43 years
Noncompete Agreements [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 4,670
Finite-Lived Intangible Assets, Accumulated Amortization	(486)
Finite-Lived Intangible Assets, Net	4,184
Noncompete Agreements [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	380
Finite-Lived Intangible Assets, Accumulated Amortization	(8)
Finite-Lived Intangible Assets, Net	372
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	79,920	28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(13,535)	(10,575)
Finite-Lived Intangible Assets, Net	$ 66,385	$ 17,625
Finite-Lived Intangible Asset, Useful Life (Month)	161 months	90 months
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 60,172	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(7,287)	(5,277)
Finite-Lived Intangible Assets, Net	52,885	8,795
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	7,312	1,692
Finite-Lived Intangible Assets, Accumulated Amortization	(807)	(635)
Finite-Lived Intangible Assets, Net	6,505	1,057
Customer Relationships [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	12,436	12,436
Finite-Lived Intangible Assets, Accumulated Amortization	(5,441)	(4,663)
Finite-Lived Intangible Assets, Net	6,995	7,773
Credentialing [Member]
Finite-Lived Intangible Assets, Gross	32,000	32,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,556)	(1,956)
Finite-Lived Intangible Assets, Net	28,444	30,044
Credentialing [Member] | Expedited [Member]
Finite-Lived Intangible Assets, Gross	32,000	32,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,556)	(1,956)
Finite-Lived Intangible Assets, Net	$ 28,444	$ 30,044
Finite-Lived Intangible Asset, Useful Life (Month)	160 months	169 months