Stock-Based Compensation - Schedule of Stock Options Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Shares
Granted (in shares)	100
Employee Stock Option
Shares
Outstanding at beginning of period (in shares)	27,507	114,259	392,465
Granted (in shares)	100	236	0
Exercised (in shares)	(13,796)	(988)	(278,206)
Expired (in shares)	0	(86,000)	0
Forfeited (in shares)	(236)	0	0
Outstanding at end of period (in shares)	13,575	27,507	114,259
Exercisable at end of period (in shares)	13,475	27,271	113,309
Weighted- Average Exercise Price
Outstanding at beginning or period (in dollars per share)	$ 14.31	$ 17.89	$ 15.47
Granted (in dollars per share)	27.98	16.58	0
Exercised (in dollars per share)	19.00	11.32	14.48
Expired (in dollars per share)	0	19.11	0
Forfeited (in dollars per share)	16.58	0	0
Outstanding at end of period (in dollars per share)	9.61	14.31	17.89
Exercisable at end of period (in dollars per share)	$ 9.48	$ 14.29	$ 17.95