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Note 10 - Common Stock Options (Tables)

12 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Years Ended September 30
		2023				2022
Expected volatility			N/A				31.79	%
Expected dividends			N/A				2.77	%
Expected exercise term (years)			N/A				7
Risk-free interest rate			N/A				2.89	%

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

		Number of Shares				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Terms (years)				Aggregate Intrinsic Value(1)
Options outstanding, September 30, 2021			45,250			$	19.34				6.0			$	213,898
Options granted			6,000				19.90
Options exercised			(8,750	)			14.49
Options forfeited			(8,000	)			27.87
Options outstanding, September 30, 2022			34,500			$	18.69				5.7			$	121,278
Options exercised			(12,500	)			16.00
Options outstanding, September 30, 2023			22,000			$	20.23				5.6			$	18,388
Vested and exercisable at September 30, 2023			22,000			$	20.23				5.6			$	18,388

		Years Ended September 30
		2023				2022
Weighted-average grant date option fair value		$	—			$	5.39
Stock option expense			21,560				16,330
Intrinsic value of options exercised			46,921				58,944
Proceeds from exercise of stock options			200,000				126,814

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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