Stock-Based Compensation - Summary of RSUs Activity (Details) - Restricted stock units	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Number of RSUs
Beginning of period (in shares) | shares	4,241,640
Granted (in shares) | shares	1,939,025
Vested (in shares) | shares	(1,047,565)
Forfeited (in shares) | shares	(219,788)
End of period (in shares) | shares	4,913,312
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 58.43
Granted (in dollars per share) | $ / shares	30.53
Vested (in dollars per share) | $ / shares	51.90
Forfeited (in dollars per share) | $ / shares	40.43
Ending balance (in dollars per share) | $ / shares	$ 49.61