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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Note 8 - Fair Value (Details Textual) $ in Millions	6 Months Ended
Note 8 - Fair Value (Details Textual) $ in Millions	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 USD ($)	Mar. 31, 2026 shares	Dec. 31, 2025 USD ($)	Jan. 25, 2022 shares
Long-Term Debt	$ 25.2			$ 25.7
Boston Omaha [Member]
Equity Securities, FV-NI	84.0
The 24th Street Funds, Special Purpose Entities [Member]
Investment Owned, Fair Value	$ 19.0			24.3
The 24th Street Funds, Special Purpose Entities [Member] \| Measurement Input, Cap Rate [Member] \| Minimum [Member]
Investment Company, Investment Owned, Measurement Input	0.0543
The 24th Street Funds, Special Purpose Entities [Member] \| Measurement Input, Cap Rate [Member] \| Maximum [Member]
Investment Company, Investment Owned, Measurement Input	0.0662
Sky Harbour Group Corporation Class A Common Stock [Member]
Equity Method Investment, Ownership Percentage	14.80%		15.30%
Equity Method Investment, Shares (in shares) \| shares	11,339,994		11,671,494		4,500,000
Equity Method Investment, Quoted Market Value	$ 111.6			105.0
Private Placement Warrants [Member]
Fair Value Adjustment of Warrants	(1.4)	$ (9.4)
Fair Value, Inputs, Level 2 [Member]
Long-Term Debt, Fair Value	$ 24.4			$ 24.7