Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Non- controlling Interest
Beginning balance at Sep. 30, 2022	$ 418,339	$ 198	$ 1,219,213	$ (136)	$ (820,755)	$ 19,819
Beginning balance (in shares) at Sep. 30, 2022		105,960,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	19,390		19,390
Exercise of stock options	576		576
Exercise of stock options (in shares)		82,000
Common stock - restricted stock units vesting	0	$ 1	(1)
Common stock - restricted stock units vesting (in shares)		98,000
Foreign currency translation adjustments	(122)			(122)
Change in unrealized losses on available-for-sale securities	0
Net loss	(41,811)				(41,325)	(486)
Ending balance at Dec. 31, 2022	396,372	$ 199	1,239,178	(258)	(862,080)	19,333
Ending balance (in shares) at Dec. 31, 2022		106,140,000
Beginning balance at Sep. 30, 2023	287,162	$ 200	1,300,395	(3,222)	(1,026,030)	15,819
Beginning balance (in shares) at Sep. 30, 2023		107,312,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	19,694		19,694
Exercise of stock options	$ 267		267
Exercise of stock options (in shares)	33,825	34,000
Common stock - restricted stock units vesting (in shares)		154,000
Foreign currency translation adjustments	$ 58			58
Change in unrealized losses on available-for-sale securities	1,909			1,909
Net loss	(135,376)				(132,864)	(2,512)
Ending balance at Dec. 31, 2023	$ 173,714	$ 200	$ 1,320,356	$ (1,255)	$ (1,158,894)	$ 13,307
Ending balance (in shares) at Dec. 31, 2023		107,500,000