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v3.24.1

Note 9 - Fair Value (Details Textual) | 1 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 25, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($)
Long-Term Debt |  |  | $ 27,337,766 |
Fair Value Adjustment of Warrants |  |  | (0) | $ (1,837,211)
Boston Omaha [Member] |  |  |  |
Investment Owned, Fair Value |  |  | 84,000,000 |
The 24th Street Funds, Special Purpose Entities [Member] |  |  |  |
Investment Owned, Fair Value |  |  | $ 64,900,000 |
Sky Harbour Group Corporation [Member] |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 19.80% |
Equity Method Investment, Shares (in shares) | shares |  |  | 13,118,474 |
Equity Method Investment, Quoted Market Value |  |  | $ 127,000,000 |
Measurement Input, Cap Rate [Member] | The 24th Street Funds, Special Purpose Entities [Member] | Minimum [Member] |  |  |  |
Investment Company, Investment Owned, Measurement Input |  |  | 0.065 |
Measurement Input, Cap Rate [Member] | The 24th Street Funds, Special Purpose Entities [Member] | Maximum [Member] |  |  |  |
Investment Company, Investment Owned, Measurement Input |  |  | 0.0675 |
Public Warrants [Member] |  |  |  |
Fair Value Adjustment of Warrants | $ 1,837,211 |  |  |
Private Placement Warrants [Member] |  |  |  |
Fair Value Adjustment of Warrants |  | $ (2,700,000) | $ 4,000,000 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Long-Term Debt, Fair Value |  |  | $ 24,818,323 |

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