Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (90,552)	$ (77,474)
Stock-based compensation	91,697	42,051
Depreciation and amortization	7,761	5,763
Unrealized (gains) losses on marketable securities	5,755	(1,387)
Amortization/(accretion) of note premiums/discounts	2,013	142
Changes in operating assets and liabilities:
Accounts receivable	10,016	174
Prepaid expenses and other current assets	(8,876)	(2,895)
Deferred revenue	(87,100)	211,392
Accounts payable	(3,563)	3,208
Accrued expenses	1,713	13,682
Other	3,672	685
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(67,464)	195,341
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(20,066)	(15,368)
Purchases of investments	(223,391)	(95,195)
Proceeds from sale of investments	201,595	87,130
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(41,862)	(23,433)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the exercises of stock options	4,331	10,490
Proceeds from investment in joint venture	60,000	0
NET CASH PROVIDED BY FINANCING ACTIVITIES	64,331	10,490
NET INCREASE (DECREASE) IN CASH	(44,995)	182,398
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	184,434	143,583
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 139,439	$ 325,981