Note 1 - Accounting Policies (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Receivables, Equipment Downtime Reimbursement	$ 2,100,000	$ 994,000
Other Receivables, Net, Current	7,203,000	6,263,000
Bank Overdrafts	182,000	135,000
Advertising Expense	$ 2,014,000	$ 2,101,000	$ 1,154,000
Truckload Services [Member] \| Sales [Member] \| Product Concentration Risk [Member]
Concentration Risk, Percentage	65.30%	66.00%	67.00%
Independent Contractors [Member]
Other Receivables, Net, Current	$ 768,000	$ 1,379,000

The receivables attributable to the equipment downtime reimbursement from equipment partners.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

+ References

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

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