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Note 19 - Subsequent Events (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 20, 2023 | Jan. 01, 2023
Stock Issued During Period, Value, New Issues |  |  | $ 205,389 | $ 62,850,213 |  |
Subsequent Event [Member] | Logic Commercial Real Estate [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 9.00%
Subsequent Event [Member] | Logic Commercial Real Estate [Member] | Brendan Keating LLC [Member] |  |  |  |  |  |
Equity Method Investment, Shares Distributed, Percentage of Investment |  |  |  |  |  | 60.00%
Common Class A [Member] | Subsequent Event [Member] | Sky Harbour Group Corporation [Member] |  |  |  |  |  |
Share Price (in dollars per share) |  |  |  |  | $ 8.36 |
Common Class A [Member] | Subsequent Event [Member] | Sky Harbour Group Corporation [Member] | Minimum [Member] |  |  |  |  |  |
Share Price (in dollars per share) |  |  |  |  | 2.66 |
Common Class A [Member] | Subsequent Event [Member] | Sky Harbour Group Corporation [Member] | Maximum [Member] |  |  |  |  |  |
Share Price (in dollars per share) |  |  |  |  | $ 8.90 |
At The Market Offering [Member] | Common Class A [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 7,887 |  |  |  |  |
Stock Issued During Period, Value, New Issues | $ 205,389 |  |  |  |  |
At The Market Offering [Member] | Common Class A [Member] | Subsequent Event [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 1,097,824 |  |  |  |
Stock Issued During Period, Value, New Issues |  | $ 27,300,000 |  |  |  |

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