Note 7 - Acquisition of Lew Thompson & Son Trucking, Inc - Allocation of Preliminary Purchase Price (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 26, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid pursuant to Stock Purchase Agreement		$ 107,934	$ 38,501	$ (0)
Lew Thompson & Son Trucking, Inc. [Member]
Cash paid pursuant to Stock Purchase Agreement	$ 100,726
Cash acquired included in historical book value of Sims' assets and liabilities	(839)
Contingent consideration, Acquisition	10,016
Net purchase price	$ 109,903