Stock-Based Compensation - Schedule of RSUs Activity (Details) - Restricted stock units	6 Months Ended
	Mar. 31, 2025 $ / shares shares
Number of RSUs
Beginning of period (in shares) | shares	4,913,312
Granted (in shares) | shares	2,576,819
Vested (in shares) | shares	(1,337,263)
Forfeited (in shares) | shares	(219,125)
End of period (in shares) | shares	5,933,743
Weighted- Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) | $ / shares	$ 49.61
Granted (in dollars per share) | $ / shares	19.88
Vested (in dollars per share) | $ / shares	44.15
Forfeited (in dollars per share) | $ / shares	33.97
Ending balance (in dollars per share) | $ / shares	$ 38.49