Note 6 - Income (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net income (loss)	$ 22,745	$ (533,028)
Weighted average common shares outstanding (in shares)	24,391,961	24,219,703
Dilutive effects of common share equivalents (in shares)	0	0
Dilutive weighted average outstanding shares of common stock (in shares)	24,391,961	24,219,703
Basic and diluted income (loss) per common share (in dollars per share)	$ 0.00	$ (0.02)