Stock-Based Compensation - Schedule of RSUs Activity (Details) - Restricted stock units	12 Months Ended
	Sep. 30, 2025 $ / shares shares
Number of RSUs
Beginning of period (in shares) | shares	4,913,312
Granted (in shares) | shares	2,779,689
Vested (in shares) | shares	(1,525,693)
Forfeited (in shares) | shares	(356,957)
End of period (in shares) | shares	5,810,351
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 49.61
Granted (in dollars per share) | $ / shares	19.38
Vested (in dollars per share) | $ / shares	47.15
Forfeited (in dollars per share) | $ / shares	30.19
Ending balance (in dollars per share) | $ / shares	$ 36.97