Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenue
Total revenue	$ 79,204	$ 86,160	$ 97,074
Operating expenses:
Research and development	163,524	164,522	174,111
General and administrative	52,887	45,482	32,536
Total operating expenses	216,411	210,004	206,647
Loss from operations	(137,207)	(123,844)	(109,573)
Other income (expense):
Interest expense	(5,148)	0	0
Interest and investment income, net	11,360	1,573	2,021
Change in fair value of Series 1 nonconvertible preferred stock	0	83	(27)
Total other income , net	6,212	1,656	1,994
Loss before income taxes	(130,995)	(122,188)	(107,579)
Income tax (expense) benefit	(2,821)	433	28,583
Net loss	$ (133,816)	$ (121,755)	$ (78,996)
Net loss per share:
Basic	$ (6.38)	$ (5.91)	$ (3.92)
Diluted	$ (6.38)	$ (5.91)	$ (3.92)
Weighted average shares outstanding:
Basic	20,969	20,603	20,171
Diluted	20,969	20,603	20,171
Royalty [Member]
Revenue
Total revenue	$ 78,204	$ 86,160	$ 97,074
License [Member]
Revenue
Total revenue	$ 1,000	$ 0	$ 0