The Company and Its Significant Accounting Policies - Adoption of ASU 2020-06 (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021	Jul. 01, 2021	Jun. 30, 2021
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Convertible senior notes, net	$ 1,697,985			$ 909,847
Accumulated deficit	$ (544,828)			(247,467)
Previously Reported
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Convertible senior notes, net				909,847
Deferred income tax liability		$ 3,877		9,090
Additional paid-in capital				2,777,155
Accumulated deficit		$ (294,152)		(247,467)
Accounting Standards Update 2020-06
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Convertible senior notes, net			$ 1,131,762
Deferred income tax liability			3,241
Additional paid-in capital			2,532,089
Accumulated deficit			(218,467)
Deferred tax liabilities associated with allocation of notes into equity				$ 5,800
Accounting Standards Update 2020-06 | Revision of Prior Period, Adjustment
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Convertible senior notes, net			(25,316)
Deferred income tax liability			(3,684)
Accumulated deficit			29,000
Accounting Standards Update 2020-06 | 2025 Senior Notes
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Convertible senior notes, net			247,231
Deferred income tax liability			(2,165)
Additional paid-in capital			$ (245,066)