Stock-Based Compensation - Performance Stock Units Activity (Details) - Performance Stock Units $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Number of Units
Outstanding, beginning balance (in shares) | shares	398,077
Granted (in shares) | shares	249,370
Released (in shares) | shares	(263,158)
Forfeited (in shares) | shares	(119,098)
Outstanding, ending balance (in shares) | shares	265,191
Weighted-Average Grant Date Fair Value
Outstanding, beginning balance (in USD per share) | $ / shares	$ 26.96
Granted (in USD per share) | $ / shares	17.54
Released (in USD per share) | $ / shares	26.26
Forfeited (in USD per share) | $ / shares	21.45
Outstanding, ending balance (in USD per share) | $ / shares	$ 21.27
Additional Information
Aggregate Intrinsic Value, beginning balance | $	$ 5,533
Aggregate Intrinsic Value, ending balance | $	$ 3,424