Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (98,260)	$ (90,552)
Adjustments to reconcile net loss to net cash flow from operating activities
Stock-based compensation	59,949	91,697
Depreciation and amortization	8,634	7,761
(Accretion) amortization of note premiums/discounts	(1,030)	2,013
Non-cash interest expense on liability related to the sale of future royalties	13,064	0
Unrealized losses on marketable securities	0	5,755
Changes in operating assets and liabilities:
Accounts receivable	164	10,016
Prepaid expenses and other current assets	27,913	(8,867)
Accounts payable	5,001	(3,563)
Accrued expenses	(32,082)	1,713
Deferred revenue	(113,144)	(87,100)
Operating lease liabilities	1,158	3,733
Net cash used in operating activities	(128,633)	(67,394)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(112,830)	(20,066)
Purchases of investments	(233,984)	(223,391)
Proceeds from maturities of investments	220,150	201,595
Net cash used in investing activities	(126,664)	(41,862)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the exercises of stock options	2,232	4,331
Proceeds from the sale of future royalties	250,000	0
Proceeds from investment in joint venture	0	60,000
Proceeds from additional tenant improvement allowance	669	0
Net cash provided by financing activities	252,901	64,331
Net decrease in cash, cash equivalents and restricted cash	(2,396)	(44,925)
Effect of exchange rate on cash, cash equivalents and restricted cash	(275)	(70)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
BEGINNING OF PERIOD	108,005	184,434
END OF PERIOD	105,334	139,439
Supplementary disclosures:
Interest paid	0	0
Income taxes (paid) refunded	$ 0	$ 0