Net Income Per Share (Details) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income	$ 6,027,755	$ 5,523,778	$ 5,064,902
Denominator:
Basic weighted average shares	17,411,684	17,256,750	17,225,423
Dilutive effect of share-based awards	7,501	1,121	1,197
Diluted weighted average shares	17,419,185	17,257,871	17,226,620
Net income per common share:
Basic	$ 0.35	$ 0.32	$ 0.29
Diluted	$ 0.35	$ 0.32	$ 0.29
Options to purchase common stock outstanding (in shares)	224,000	57,584	100,000
Anti-dilutive options to purchase common stock excluded from the computation of diluted earnings per share (in shares)	203,000	0	100,000
Restricted Stock Units
Net income per common share:
Restricted stock units outstanding (in shares)	101,968	7,886	0