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Note 6 - Goodwill, Other Intangibles, and Other Assets (Details Textual) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Oct. 01, 2021	Jul. 03, 2018
Additional Amortization Resulting from Termination of Non-compete Agreement			$ 1.3
Termination of Non-ompete Agreement, Effect on Earnings, after Tax			$ (1.0)
Termination of Non-comepete Agreement, Effect on Earnings Per Share, after Tax (in dollars per share)			$ (0.06)
Finite-Lived Intangible Asset, Useful Life (Year)		102 months	105 months
Amortization of Intangible Assets, Total		$ 4.0	$ 5.1
Dedicated [Member]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount				8.50%
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			9 months
Landair Holdings Inc [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
Landair Holdings Inc [Member] | Trade Names [Member]
Finite-Lived Intangible Assets, Remaining Amortization Period (Month)	15 months
Acquired Finite-lived Intangible Asset, Residual Value	$ 0.5

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- Definition

Amount of additional amortization expense during the period as a result of the termination of non-compete agreement.

+ References

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After tax earnings per share or per unit impact arising from termination of non-compete agreement.

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The aggregate expected value at the end of their useful life of a major finite-lived intangible asset class acquired during the period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Percentage of fair value of reporting unit in excess of carrying amount.

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