Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)
Income Tax Expense (Benefit)	$ 0	$ 0	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent	0.00%	0.00%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Number of Major Tenants	0	0	0	0
Consolidated Subsidiaries [Member] \| Sky Harbour LLC [Member]
Subsidiary, Ownership Percentage, Parent	100.00%		100.00%

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details