Note 12 - Sale of Intermodal Business Assets Subsequent Event (Details Textual) - Subsequent Event [Member] - Intermodal Business Assets [Member] $ in Millions	Jul. 22, 2025 USD ($)
Refrigerated Containers	1,200
Disposal Group, Including Discontinued Operation, Consideration	$ 51.8

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant