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Note 17 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) |  | 1 Months Ended
--- | --- | ---
Nov. 01, 2023 | Oct. 30, 2023
Sky Harbour Group Corporation [Member] | Private Placement [Member] |  |
Stock Issued During Period, Shares, New Issues (in shares) | 6,586,154 |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 1,141,600 |
Proceeds from Issuance or Sale of Equity | $ 42,800,000 |
Sky Harbour Group Corporation [Member] | Additional PIPE Offering [Member] |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 400,000 |
Equity Offering, Maximum Shares (in shares) | 2,307,692 |
Equity Offering, Maximum Amount | $ 15,000,000 |
SunRiver Fiber Network [Member] | FIF St George, LLC [Member] |  |
Business Combination, Consideration Transferred |  | $ 4,375,000

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