Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (22,509,298)	$ 35,934,235
Stock-based compensation	17,463,455	5,318,882
Depreciation and amortization	2,631,472	2,353,319
Amortization/(accretion) of note premiums	419,212	330,229
Changes in operating assets and liabilities:
Accounts receivable	(604,410)	(13,094,965)
Prepaid expenses and other current assets	46,520	(1,440,287)
Deferred revenue	(49,630,006)	120,622,138
Accounts payable	5,767,770	1,256,092
Accrued expenses	(5,424,591)	(2,340,651)
Other	725,481	(240,737)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(51,114,395)	148,698,255
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(7,929,100)	(946,788)
Purchases of marketable securities	(180,523,424)	(90,266,001)
Proceeds from sale of marketable securities	19,602,967	12,239,219
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(168,849,557)	(78,973,570)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on notes payable		(2,415,150)
Proceeds from the exercises of stock options	4,331,577	3,674,731
Proceeds from the issuance of common stock	250,478,974	60,521,729
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	254,810,551	61,781,310
NET INCREASE (DECREASE) IN CASH	34,846,599	131,505,995
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	221,804,128	30,133,213
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 256,650,727	161,639,208
Supplementary disclosures:
Interest paid		(27,437)
Income Taxes Paid		$ (2,400)