Note 5 - Goodwill, Other Intangible, and Other Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 03, 2018
Goodwill, Period Increase (Decrease), Total	$ 0.9
Finite-Lived Intangible Asset, Useful Life	10 years 240 days	11 years 240 days
Amortization of Intangible Assets, Total	$ 2.9	$ 1.5	$ 0.2
Landair Holdings Inc [Member]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

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

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- Definition

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.

+ References

No definition available.

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- Definition

Amount of increase (decrease) 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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