Note 10 - Equity and Redeemable Equity (Details Textual) - shares	Jun. 30, 2023	Dec. 31, 2022	Aug. 18, 2022
Sky Harbour LLC [Member] | LLC Interests and TRA Holders [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner	73.80%
Overflow [Member] | Former Majority Shareholder [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner	49.00%
Common Class A [Member]
Common Stock, Shares, Outstanding (in shares)	15,233,211	14,962,831
Common Stock, Shares, Issued (in shares)	15,233,211	14,962,831
Common Class A [Member] | Common Stock Purchase Agreement [Member]
Share Purchase Right, Shares to be Purchased (in shares)			10,000,000
Share Purchase Right, Price Modifier			0.97
Common Stock, Shares, Issued (in shares)		25,000
Share Purchase Right, Contingent Commitment Shares (in shares)			75,000
Common Class A [Member] | Common Stock Purchase Agreement [Member] | Minimum [Member]
Share Purchase Right, Shares to be Purchased (in shares)			1,000,000
Share Purchase Right, Total Aggregate Number of Shares			20.00%
Common Class B [Member]
Common Stock, Shares, Outstanding (in shares)	42,046,356	42,192,250
Common Stock, Shares, Issued (in shares)	42,046,356	42,192,250