Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Details) - USD ($)	Sep. 30, 2023	Sep. 30, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 60,495,000	$ 171,319,000
Capitalized research and development	75,208,000	324,000
Tax credits	66,407,000	0
Deferred revenue	59,441,000	38,810,000
Lease liabilities	25,382,000	2,844,000
Stock compensation	10,296,000	41,479,000
Accrued compensation	3,082,000	2,961,000
Intangible assets	1,523,000	2,973,000
Other	2,636,000	2,162,000
Total gross deferred tax assets	304,470,000	262,872,000
Valuation allowance	(284,626,000)	(242,394,000)
Deferred tax liabilities:
Fixed assets	(9,878,000)	(1,088,000)
Right-of-use assets	(9,966,000)	0
State taxes	0	(19,390,000)
Total gross deferred tax liability	(19,844,000)	(20,478,000)
Net deferred tax assets (liabilities)	$ 0	$ 0