Stock-Based Compensation - Schedule of Stock Options Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Shares
Granted (in shares)	50
Employee Stock Option
Shares
Outstanding at beginning of period (in shares)	13,575	27,507	114,259
Granted (in shares)	50	100	236
Exercised (in shares)	(2,475)	(13,796)	(988)
Expired (in shares)	0	0	(86,000)
Forfeited (in shares)	0	(236)	0
Outstanding at end of period (in shares)	11,150	13,575	27,507
Exercisable at end of period (in shares)	11,000	13,475	27,271
Weighted- Average Exercise Price
Outstanding at beginning or period (in dollars per share)	$ 9.61	$ 14.31	$ 17.89
Granted (in dollars per share)	27.73	27.98	16.58
Exercised (in dollars per share)	8.08	19.00	11.32
Expired (in dollars per share)	0	0	19.11
Forfeited (in dollars per share)	0	16.58	0
Outstanding at end of period (in dollars per share)	10.04	9.61	14.31
Exercisable at end of period (in dollars per share)	$ 9.79	$ 9.48	$ 14.29