CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in-Capital	Additional Paid-in-Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Balance at Sep. 30, 2022	$ 712,950	$ (8,530)	$ 394	$ 1,029,542	$ (14,371)	$ (283,249)	$ 5,841	$ (33,737)
Balance (in shares) at Sep. 30, 2022			39,430
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate202006CumulativeEffectPeriodOfAdoptionMember
Net loss	$ (28,247)					(28,247)
Other comprehensive income (loss)	10,364							10,364
Issuance of common stock	4,394		$ 10	4,384
Issuance of common stock, (in shares)			920
Stock withheld to cover tax withholdings requirements upon stock vesting	(4,430)		$ (1)	(4,429)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(58)
Stock-based compensation	22,922			22,922
Balance at Mar. 31, 2023	709,423		$ 403	1,038,048		(305,655)		(23,373)
Balance (in shares) at Mar. 31, 2023			40,292
Balance at Dec. 31, 2022	719,851		$ 400	1,023,467		(279,566)		(24,450)
Balance (in shares) at Dec. 31, 2022			40,017
Net loss	(26,089)					(26,089)
Other comprehensive income (loss)	1,077							1,077
Issuance of common stock	2,671		$ 3	2,668
Issuance of common stock, (in shares)			276
Stock withheld to cover tax withholdings requirements upon stock vesting	(1,787)			(1,787)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(1)
Stock-based compensation	13,700			13,700
Balance at Mar. 31, 2023	709,423		$ 403	1,038,048		(305,655)		(23,373)
Balance (in shares) at Mar. 31, 2023			40,292
Balance at Sep. 30, 2023	694,875		$ 404	1,056,099		(333,662)		(27,966)
Balance (in shares) at Sep. 30, 2023			40,423
Net loss	(254,119)					(254,119)
Other comprehensive income (loss)	1,203							1,203
Issuance of common stock	10,523		$ 13	10,510
Issuance of common stock, (in shares)			1,355
Stock withheld to cover tax withholdings requirements upon stock vesting	(9,744)			(9,744)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(1)
Stock-based compensation	20,662			20,662
Balance at Mar. 31, 2024	463,400		$ 417	1,077,527		(587,781)		(26,763)
Balance (in shares) at Mar. 31, 2024			41,777
Balance at Dec. 31, 2023	731,133		$ 412	1,064,022		(309,805)		(23,496)
Balance (in shares) at Dec. 31, 2023			41,237
Net loss	(277,976)					(277,976)
Other comprehensive income (loss)	(3,267)							(3,267)
Issuance of common stock	4,322		$ 5	4,317
Issuance of common stock, (in shares)			541
Stock withheld to cover tax withholdings requirements upon stock vesting	(3,535)			(3,535)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(1)
Stock-based compensation	12,723			12,723
Balance at Mar. 31, 2024	$ 463,400		$ 417	$ 1,077,527		$ (587,781)		$ (26,763)
Balance (in shares) at Mar. 31, 2024			41,777