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Note 15 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Federal statutory income tax rate 21.00% 21.00%
State income taxes, net of federal benefit 2.10% 1.40%
Permanent differences 11.90% (1.50%)
Contingent derivative expense 0.50% 0.20%
Change in value of convertible debt (2.50%) 0.00%
Change in valuation allowance (33.00%) (21.10%)
Provision for income taxes 0.00% 0.00%