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Note 6 - Acquisition of AAT Carriers, Inc. (Details Textual) - AAT Carriers Inc [Member] - USD ($) $ in Millions	Feb. 09, 2022	Dec. 31, 2022
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Combination, Consideration Transferred, Total	$ 54.7
Stock Purchase Agreement, Earnout Component	20.0
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 20.0
Minimum [Member]
Purchase Price, Including Earnout	38.5
Maximum [Member]
Purchase Price, Including Earnout	$ 57.0

X

- References

No definition available.

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- Definition

The earnout component of stock purchase agreement.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=126966197&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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-Section 30
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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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