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Note 16 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions	Feb. 09, 2022	Feb. 10, 2022	Jan. 26, 2022
Dividends Payable, Amount Per Share (in dollars per share)			$ 0.0625
The 10b5-1 Plan [Member]
Stock Repurchase Program, Authorized Amount		$ 30
Class A Common Stock [Member]
Stock Repurchase Program, Authorized Amount		$ 38
AAT Carriers [Member]
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period	$ 25
AAT Carriers [Member] | Minimum [Member]
Expected Purchase Price Including Earnout Achieved	35
AAT Carriers [Member] | Maximum [Member]
Expected Purchase Price Including Earnout Achieved	$ 55

X

- Definition

Amount of expected consideration to be provided as a purchase price, including any earnout achieved.

+ References

No definition available.

+ Details

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X

- Definition

Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.

+ References

No definition available.

+ Details

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X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

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X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Details

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- Details

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