Note 13 - Acquisition of Lew Thompson & Son Trucking, Inc - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Apr. 06, 2023	Dec. 31, 2022
Goodwill	$ 73,154			$ 58,217
Lew Thompson & Son Trucking, Inc. [Member]
Accounts receivable			$ 5,135
Driver advances and other receivables			421
Inventory and supplies			1,015
Prepaid expenses			561
Net property and equipment			44,499
Other assets, net			120
Other intangibles, net			52,870
Total identifiable assets acquired			104,621
Accounts payable			(565)
Accrued expenses			(1,465)
Current portion of operating lease obligations			(396)
Current portion of insurance and claims accrual			(56)
Long-term portion of operating lease obligations			(2,103)
Total liabilities assumed			(4,585)
Net identifiable assets acquired			100,036
Goodwill	$ 9,900	$ 10,700	9,867
Net assets acquired			$ 109,903