Note 3 - Restructuring and Cost Savings Initiatives - Summary of Asset Groups Impaired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Impairment of long lived property, equipment, and right-of-use assets	$ 0	$ 26,569
Revenue Equipment [Member] | Highway Services and Dedicated [Member]
Impairment of long lived property, equipment, and right-of-use assets		16,779
Terminal Property [Member] | Highway Services and Dedicated [Member]
Impairment of long lived property, equipment, and right-of-use assets		7,319
Leased Office Facility [Member]
Impairment of long lived property, equipment, and right-of-use assets		2,200
Leased Office Facility [Member] | Managed Freight [Member]
Impairment of long lived property, equipment, and right-of-use assets		2,236
Training and Orientation Center [Member] | Highway Services [Member]
Impairment of long lived property, equipment, and right-of-use assets		$ 235