Stockholders' Equity - Schedule of Non-vested Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Time-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested, Shares, Beginning balance	996,016
Non-vested, Shares, Granted	2,559,259
Non-vested, Shares, Vested	(841,633)
Non-vested, Shares, Forfeited	(341,497)
Non-vested, Shares, Ending balance	2,372,145
Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested, Shares, Beginning balance	434,995
Non-vested, Shares, Granted	1,347,474
Non-vested, Shares, Vested	(124,843)
Non-vested, Shares, Forfeited	(512,076)
Non-vested, Shares, Ending balance	1,145,550
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested, Shares, Beginning balance	1,431,011
Non-vested, Shares, Granted	3,906,733
Non-vested, Shares, Vested	(966,476)
Non-vested, Shares, Forfeited	(853,573)
Non-vested, Shares, Ending balance	3,517,695
Non-vested, Shares, Expected to vest		3,517,695
Non-vested, Weighted-Average Grant-Date Fair Value, Beginning balance	$ 62.49
Non-vested, Weighted-Average Grant-Date Fair Value, Granted	20.02
Non-vested, Weighted-Average Grant-Date Fair Value, Vested	56.85
Non-vested, Weighted-Average Grant-Date Fair Value, Forfeited	42.39
Non-vested, Weighted-Average Grant-Date Fair Value, Ending balance	$ 32.52
Non-vested, Weighted-Average Grant-Date Fair Value, Expected to vest		$ 32.52
Non-vested, Weighted-Average Remaining Contractual Term (years), Balance	1 year 2 months 8 days
Non-vested, Weighted-Average Remaining Contractual Term (years), Expected to vest	1 year 2 months 8 days
Non-vested, Aggregate Intrinsic Value, Balance	$ 71,620
Non-vested, Aggregate Intrinsic Value, Expected to vest	$ 71,620