Consolidated Statements of Stockholders’ Equity and Noncontrolling Interest - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Noncontrollling Interest
Beginning balance at Sep. 30, 2020	$ 461,779	$ 195	$ 965,410	$ 18	$ (503,844)	$ 0
Beginning balance (in shares) at Sep. 30, 2020		102,376,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	42,051		42,051
Exercise of stock options	10,490	$ 1	10,489
Exercise of stock options (in shares)		981,000
Common stock - restricted stock units vesting	0	$ 1	(1)
Common stock - restricted stock units vesting (in shares)		852,000
Foreign currency translation adjustments	44			44
Net income (loss)	(77,474)				(77,474)
Ending balance at Jun. 30, 2021	436,890	$ 197	1,017,949	62	(581,318)	0
Ending balance (in shares) at Jun. 30, 2021		104,209,000
Beginning balance at Mar. 31, 2021	445,549	$ 196	996,645	102	(551,394)	0
Beginning balance (in shares) at Mar. 31, 2021		104,020,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	18,549		18,549
Exercise of stock options	2,756	$ 1	2,755
Exercise of stock options (in shares)		161,000
Common stock - restricted stock units vesting (in shares)		28,000
Foreign currency translation adjustments	(40)			(40)
Net income (loss)	(29,924)				(29,924)
Ending balance at Jun. 30, 2021	436,890	$ 197	1,017,949	62	(581,318)	0
Ending balance (in shares) at Jun. 30, 2021		104,209,000
Beginning balance at Sep. 30, 2021	408,822	$ 197	1,053,386	(69)	(644,692)	0
Beginning balance (in shares) at Sep. 30, 2021		104,327,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	91,697		91,697
Exercise of stock options	$ 4,281		4,281
Exercise of stock options (in shares)	506,596	497,000
Common stock - restricted stock units vesting	$ 0	$ 1	(1)
Common stock - restricted stock units vesting (in shares)		971,000
Foreign currency translation adjustments	(71)			(71)
Interest in joint venture	60,000		39,750			20,250
Net income (loss)	(90,552)				(90,552)
Ending balance at Jun. 30, 2022	474,177	$ 198	1,189,113	(140)	(735,244)	20,250
Ending balance (in shares) at Jun. 30, 2022		105,795,000
Beginning balance at Mar. 31, 2022	452,266	$ 198	1,115,373	(107)	(663,198)	0
Beginning balance (in shares) at Mar. 31, 2022		105,702,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	33,391		33,391
Exercise of stock options	599		599
Exercise of stock options (in shares)		53,000
Common stock - restricted stock units vesting	0
Common stock - restricted stock units vesting (in shares)		40,000
Foreign currency translation adjustments	(33)			(33)
Interest in joint venture	60,000		39,750			20,250
Net income (loss)	(72,046)				(72,046)
Ending balance at Jun. 30, 2022	$ 474,177	$ 198	$ 1,189,113	$ (140)	$ (735,244)	$ 20,250
Ending balance (in shares) at Jun. 30, 2022		105,795,000