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Note 3 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended
	Aug. 18, 2023	Apr. 26, 2023	Feb. 09, 2022	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Payment for Contingent Consideration Liability, Financing Activities						$ 4,582	$ 7,023
Multistop Distribution Carriers [Member]
Assets Acquisition, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High				$ 5,000
Payment for Contingent Consideration Liability				100	$ 0	100
Assets Acquisition, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 1						5,000
AAT Carriers Inc [Member]
Business Combination, Contingent Consideration, Earnout Period (Year)			2 years
Payment for Contingent Consideration Liability							10,000
AAT Carriers Inc [Member] | Stock Purchase Agreement, Earnout Component [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			$ 20,000
Lew Thompson & Son Trucking, Inc. [Member]
Business Combination, Contingent Consideration, Earnout Period (Year)		3 years
Payment for Contingent Consideration Liability						12,500	10,000
Payment for Contingent Consideration Liability, Financing Activities						4,600	7,000
Payment for Contingent Consideration Liability, Operating Activities						8,000	3,000
Lew Thompson & Son Trucking, Inc. [Member] | Changes Measurement [Member]
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)				$ 700	$ 8,100	1,400	$ 8,800
Lew Thompson & Son Trucking, Inc. [Member] | Stock Purchase Agreement, Earnout Component [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High		$ 30,000
Sims Transport Services, LLC [Member]
Business Combination, Contingent Consideration, Earnout Period (Year)	4 years
Sims Transport Services, LLC [Member] | Stock Purchase Agreement, Earnout Component [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	$ 12,000
Lew Thompson & Son Trucking, Inc. and Asset Acquisition [Member]
Payment for Contingent Consideration Liability						$ 12,600

X

- Definition

Represents the change in the amount of contingent consideration liability related to asset acquisition arrangements.

+ References

No definition available.

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- References

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- Definition

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+ References

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- Definition

The amount of cash outflow for payment for contingent consideration liability.

+ References

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- Definition

Amount of increase (decrease) in value of liability in contingent consideration arrangement in business combination, including, but not limited to, difference arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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-Paragraph 4
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-Publisher FASB
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- Definition

Amount of increase (decrease) in maximum amount of estimate for undiscounted range of outcomes of liability in contingent consideration arrangement in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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-URI https://asc.fasb.org/1943274/2147479581/805-30-50-4

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- Definition

Maximum amount of estimate for undiscounted range of outcomes in contingent consideration arrangement in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability exceeding amount recognized at acquisition date. Includes, but is not limited to, measurement period adjustment and less amount paid soon after acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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