Stock-based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 09, 2022 member shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($) shares	Feb. 07, 2022 shares
Share-Based Payment Arrangement [Abstract]
Number of shares authorized for issuance (in shares) | shares					300,000
Additional shares authorized for issuance (in shares) | shares	50,000
Number of members of management receiving approved grant of stock | member	6
Stock-based compensation | $		$ 1,373	$ 1,882	$ 2,588
Stock-based compensation tax benefit | $		121	$ 444	$ 616
Unrecognized stock based compensation expense, stock options | $		$ 589
Compensation cost not yet recognized, period for recognition		4 months
Vesting period	4 years
Vesting percentage	20.00%
Expiration period	5 years
Weighted average grant date fair value (in usd per share) | $ / shares		$ 31.37
Exercises in period | shares		0	0	0