Convertible Senior Notes - Change in Fair Value of Embedded Conversion Derivative (Details) - Convertible Debt - Convertible Senior Unsecured Notes Due 2026 - Embedded conversion derivative $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 48,208
Remeasurement to fair value on March 3, 2022	(19,692)
Impact of increase of authorized shares of common stock on convertible senior notes hedge	(28,516)
Ending Balance	$ 0