Note 12 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Federal statutory income tax rate	21.00%	21.00%
State income taxes, net of federal benefit	4.00%	4.10%
Permanent and other differences	0.40%	0.80%
Difference due to executive compensation	2.20%	1.50%
Tax return to provision adjustments	(0.10%)	(0.10%)
Uncertain tax position	0.30%	0.50%
Stock-based compensation	(0.90%)	(0.90%)
Effective income tax rate	26.90%	26.90%