Note 9 - Income Taxes - Income Tax Expense (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Current income taxes:
Federal	$ 3,167,466	$ 3,128,721
State	733,266	689,671
Total current income taxes	3,900,732	3,818,392
Deferred income taxes:
Federal	(156,415)	(398,588)
State	347,218	276,807
Total deferred income taxes	190,803	(121,781)
Total income tax expense	$ 4,091,535	$ 3,696,611