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Note 1 - Summary of Significant Accounting Policies - Revenue by Operating Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total revenues	$ 1,216,858	$ 1,046,003
Highway Services [Member] | Expedited [Member]
Total revenues	452,713	337,063
Dedicated [Member]
Total revenues	362,997	324,541
Managed Freight [Member]
Total revenues	320,985	321,236
Managed Freight [Member] | Warehouse [Member]
Total revenues	$ 80,163	$ 63,163

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

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-Publisher FASB
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