Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss including noncontrolling interest	$ (209,275,000)	$ (176,494,000)	$ (140,848,000)
Adjustments to reconcile net loss to net cash flow from operating activities:
Stock-based compensation	78,130,000	120,893,000	76,673,000
Depreciation and amortization	12,493,000	10,421,000	8,267,000
(Accretion) amortization of note premiums/discounts	(2,017,000)	2,910,000	266,000
Non-cash interest expense on liability related to the sale of future royalties	18,326,000	0	0
Net loss (gain) from investments	0	4,432,000	(1,708,000)
Changes in operating assets and liabilities:
Accounts receivable	1,410,000	8,845,000	(9,409,000)
Prepaid expenses and other current assets	11,603,000	(19,291,000)	(360,000)
Accounts payable	32,998,000	(6,589,000)	2,628,000
Accrued expenses	(14,965,000)	17,750,000	9,522,000
Deferred revenue	(129,183,000)	(112,501,000)	223,258,000
Operating lease, net	46,590,000	13,428,000	3,192,000
Other	0	65,000	(169,000)
Net cash provided by (used in) operating activities	(153,890,000)	(136,131,000)	171,312,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(176,737,000)	(52,777,000)	(23,567,000)
Purchases of investments	(246,141,000)	(223,391,000)	(240,703,000)
Proceeds from sales and maturities of investments	326,723,000	270,751,000	122,592,000
Net cash used in investing activities	(96,155,000)	(5,417,000)	(141,678,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the exercises of stock options	3,053,000	5,186,000	11,305,000
Proceeds from the sale of future royalties	250,000,000	0	0
Proceeds from investment in joint venture	0	60,000,000	0
Net cash provided by financing activities	253,053,000	65,186,000	11,305,000
Net increase (decrease) in cash, cash equivalents and restricted cash	3,008,000	(76,362,000)	40,939,000
Effect of exchange rate on cash, cash equivalents and restricted cash	(122,000)	(67,000)	(88,000)
BEGINNING OR PERIOD	108,005,000	184,434,000	143,583,000
END OF PERIOD	110,891,000	108,005,000	184,434,000
Supplementary disclosures:
Interest paid	0	0	0
Income Taxes Paid	$ 0	$ (2,000)	$ (2,000)