CONSOLIDATED STATEMENTS OF EQUITY - 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) Retained Earnings	(Accumulated Deficit) Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Balance at Sep. 30, 2020	$ 960,071		$ 369	$ 974,307		$ (18,316)		$ 3,711
Balance (in shares) at Sep. 30, 2020			36,842
Net (loss) income	45,893					45,893
Other comprehensive income (loss)	(2,077)							(2,077)
Issuance of common stock	11,522		$ 17	11,505
Issuance of common stock, (in shares)			1,718
Stock withheld to cover tax withholdings requirements upon stock vesting	(46,009)		$ (5)	(46,004)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(535)
Stock-based compensation	62,545			62,545
Balance at Sep. 30, 2021	1,031,945		$ 381	1,002,353		27,577		1,634
Balance (in shares) at Sep. 30, 2021			38,025
Net (loss) income	(310,826)					(310,826)
Other comprehensive income (loss)	(35,371)							(35,371)
Issuance of common stock	36,062		$ 14	36,048
Issuance of common stock, (in shares)			1,584
Stock withheld to cover tax withholdings requirements upon stock vesting	(49,003)		$ (1)	(49,002)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(179)
Stock-based compensation	40,143			40,143
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) income	$ (56,254)					(56,254)
Other comprehensive income (loss)	5,771							5,771
Issuance of common stock	5,625		$ 11	5,614
Issuance of common stock, (in shares)			1,055
Increase in fair value of conversion option	4,054			4,054
Stock withheld to cover tax withholdings requirements upon stock vesting	(4,894)		$ (1)	(4,893)
Stock withheld to cover tax withholdings requirements upon stock vesting, (in shares)			(62)
Stock-based compensation	36,153			36,153
Balance at Sep. 30, 2023	$ 694,875		$ 404	$ 1,056,099		$ (333,662)		$ (27,966)
Balance (in shares) at Sep. 30, 2023			40,423