Note 14 - Commitments and Contingencies (Details Textual)	Dec. 31, 2022 USD ($)
Lessee, Operating Lease, Liability, to be Paid, Total	$ 774,000
Capital Addition Purchase Commitments [Member] | Revenue Equipment [Member]
Purchase Obligation, to be Paid, Remainder of Fiscal Year	164,300,000
Capital Addition Purchase Commitments [Member] | Building Construction [Member]
Purchase Obligation, to be Paid, Remainder of Fiscal Year	$ 4,700,000