Note 9 - Acquisitions - Acquisition of Zenith (Details) - Zenith Freight Lines, LLC [Member] - USD ($) $ in Millions		9 Months Ended
Feb. 28, 2022	Sep. 30, 2022
Consideration	$ 86.9	$ 87.1
Accounts receivable	7.2
Other current assets	1.3
Property and equipment	28.4
Other assets	0.3
Right-of-use assets	28.2
Intangibles	42.7
Accounts payable and accrued liabilities	4.2
Lease liabilities	28.2
Goodwill	$ 11.4

Amount of right-of-use assets acquired at the acquisition date.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of lease obligation assumed in business combination.

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Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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