Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Revenue
Total revenue	$ 65,324	$ 67,635	$ 79,204
Operating expenses:
Research and development	106,740	131,476	163,524
General and administrative	43,933	57,850	52,887
Total operating expenses	150,673	189,326	216,411
Loss from operations	(85,349)	(121,691)	(137,207)
Other income (expense):
Interest expense	(7,681)	(10,940)	(5,148)
Interest and investment income, net	9,442	14,770	11,360
Change in fair value of Series 1 nonconvertible preferred stock	39	73	0
Total other income, net	1,800	3,903	6,212
Loss before income taxes	(83,549)	(117,788)	(130,995)
Income tax benefit (expense)	1,660	1,743	(2,821)
Net loss	$ (81,889)	$ (116,045)	$ (133,816)
Net loss per share:
Basic	$ (3.84)	$ (5.48)	$ (6.38)
Diluted	$ (3.84)	$ (5.48)	$ (6.38)
Weighted average shares outstanding:
Basic	21,336	21,157	20,969
Diluted	21,336	21,157	20,969
Royalty [Member]
Revenue
Total revenue	$ 65,324	$ 67,635	$ 78,204
License [Member]
Revenue
Total revenue	$ 0	$ 0	$ 1,000