Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Non- controlling Interest
Beginning balance (in shares) at Sep. 30, 2023		107,312,000
Beginning balance at Sep. 30, 2023	$ 287,162	$ 200	$ 1,300,395	$ (3,222)	$ (1,026,030)	$ 15,819
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	19,694		19,694
Exercise of stock options (in shares)		34,000
Exercise of stock options	267		267
Common stock - restricted stock units vesting (in shares)		154,000
Foreign currency translation adjustments	58			58
Unrealized gains (losses) on available-for-sale securities	1,909			1,909
Net loss	(135,376)				(132,864)	(2,512)
Ending balance (in shares) at Dec. 31, 2023		107,500,000
Ending balance at Dec. 31, 2023	173,714	$ 200	1,320,356	(1,255)	(1,158,894)	13,307
Beginning balance (in shares) at Sep. 30, 2024		124,376,000
Beginning balance at Sep. 30, 2024	191,063	$ 217	1,806,000	4,750	(1,625,523)	5,619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 15,209		15,209
Exercise of stock options (in shares)	69,506	70,000
Exercise of stock options	$ 634		634
Common stock - restricted stock units vesting (in shares)		209,000
Pre-funded warrants (in shares)		917,000
Pre-funded warrants	25,000	$ 1	24,999
Foreign currency translation adjustments	(106)			(106)
Unrealized gains (losses) on available-for-sale securities	(507)			(507)
Net loss	(175,218)				(173,085)	(2,133)
Ending balance (in shares) at Dec. 31, 2024		125,572,000
Ending balance at Dec. 31, 2024	$ 56,075	$ 218	$ 1,846,842	$ 4,137	$ (1,798,608)	$ 3,486