Note 13 - Goodwill and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Gross	$ 32,600	$ 32,600
Finite-Lived Intangible Assets, Accumulated Amortization	(12,713)	(12,125)
Finite-Lived Intangible Assets, Net	19,887	20,475
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	(8,813)	(8,225)
Finite-Lived Intangible Assets, Net	$ 19,387	$ 19,975
Finite-Lived Intangible Asset, Useful Life (Month)	99 months	102 months
Customer Relationships [Member] | Dedicated [Member]
Finite-Lived Intangible Assets, Gross	$ 14,072	$ 14,072
Finite-Lived Intangible Assets, Accumulated Amortization	(4,398)	(4,104)
Finite-Lived Intangible Assets, Net	9,674	9,968
Customer Relationships [Member] | Managed Freight [Member]
Finite-Lived Intangible Assets, Gross	1,692	1,692
Finite-Lived Intangible Assets, Accumulated Amortization	(528)	(494)
Finite-Lived Intangible Assets, Net	1,164	1,198
Customer Relationships [Member] | Warehousing [Member]
Finite-Lived Intangible Assets, Gross	12,436	12,436
Finite-Lived Intangible Assets, Accumulated Amortization	(3,887)	(3,627)
Finite-Lived Intangible Assets, Net	$ 8,549	$ 8,809