Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss including noncontrolling interest	$ (176,494,000)	$ (140,848,000)	$ (84,553,000)
Adjustments to reconcile net loss to net cash flow from operating activities:
Stock-based compensation	120,893,000	76,673,000	43,383,000
Net loss (gain) from investments	4,432,000	(1,708,000)	(20,000)
Depreciation and amortization	10,421,000	8,267,000	5,942,000
Amortization of note premiums	2,910,000	266,000	525,000
Changes in operating assets and liabilities:
Accounts receivable	8,845,000	(9,409,000)	(184,000)
Prepaid expenses and other current assets	(19,291,000)	(360,000)	(387,000)
Accounts payable	(6,589,000)	2,628,000	(821,000)
Accrued expenses	17,750,000	9,522,000	1,989,000
Deferred revenue	(112,501,000)	223,258,000	(63,514,000)
Operating lease liabilities	13,428,000	3,192,000	1,124,000
Other	65,000	(169,000)	715,000
Net cash (used in) provided by operating activities	(136,131,000)	171,312,000	(95,801,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(52,777,000)	(23,567,000)	(11,952,000)
Purchases of investments	(223,391,000)	(240,703,000)	(278,964,000)
Proceeds from sale of investments	270,751,000	122,592,000	50,138,000
Net cash used in investing activities	(5,417,000)	(141,678,000)	(240,778,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the exercises of stock options	5,186,000	11,305,000	7,469,000
Proceeds from the issuance of common stock	0	0	250,479,000
Proceeds from investment in joint venture	60,000,000	0	0
Net cash provided by financing activities	65,186,000	11,305,000	257,948,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(76,362,000)	40,939,000	(78,631,000)
EFFECT OF EXCHANGE RATE ON CASH AND CASH EQUIVALENTS	(67,000)	(88,000)	410,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	184,434,000	143,583,000	221,804,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD	108,005,000	184,434,000	143,583,000
Supplementary disclosures:
Interest paid	0	0	0
Income Taxes (Paid) Refunded	$ (2,000)	$ (2,000)	$ 103,000