Stock-Based Compensation - Schedule of RSU Activitiy (Details) - RSUs	6 Months Ended
	Mar. 31, 2022 $ / shares shares
Nonvested Units
Beginning balance (in shares) | shares	2,086,541
Units granted (in shares) | shares	2,625,545
Units vested (in shares) | shares	(353,181)
Units forfeited or canceled (in shares) | shares	(266,421)
Ending balance (in shares) | shares	4,092,484
Nonvested, Weighted Average Fair Value
Beginning balance, Weighted average fair value (in dollars per share) | $ / shares	$ 17.56
Granted, Weighted average grant date fair value (in dollars per share) | $ / shares	17.04
Vested, Weighted average grant date fair value (in dollars per share | $ / shares	13.47
Forfeited, Weighted average fair value (in dollars per shares) | $ / shares	17.82
Ending Balance, Weighted average fair value (in dollars per share) | $ / shares	$ 17.21
Vested RSUs, Number of Shares
Beginning balance, Number of Units (in shares) | shares	776,544
Units vested (in shares) | shares	353,181
Units settled (in shares) | shares	(265,953)
Ending balance, Number of Units (in shares) | shares	863,772
Vested, Weighted Average Grant Date Fair Value
Vested, Beginning Balance, Weighted Average Grate Date Fair Value (in dollars per share) | $ / shares	$ 17.59
Units vested post conversion, Weighted Average Grate Date Fair Value (in dollars per share) | $ / shares	13.47
Units settled, Weighted Average Grate Date Fair Value (in dollars per share) | $ / shares	14.33
Vested, Ending Balance, Weighted Average Grate Date Fair Value (in dollars per share) | $ / shares	$ 16.01