Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 67,974,849	$ (54,450,478)	$ (34,380,295)
Change in value of derivatives		(432,141)	(890,362)
Stock-based compensation	12,393,323	8,454,607	7,891,595
Depreciation and amortization	4,439,144	4,699,275	4,690,440
Amortization/(accretion) of note premiums	1,069,070	383,075	(43,519)
Changes in operating assets and liabilities:
Accounts receivable	(333,986)	(259,578)	7,203
Prepaid expenses and other current assets	(3,710,515)	319,166	2,814,509
Deferred revenue	82,804,171	(5,269,140)	157,981
Accounts payable	4,843,825	(1,270,416)	(3,509,995)
Accrued expenses	2,450,079	1,016,506	(401,777)
Other	1,104,963	(414,293)	(274,752)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	173,034,923	(47,223,417)	(23,938,972)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(12,001,225)	(1,421,252)	(7,918,198)
Purchases of marketable securities	(90,266,001)	(52,083,131)	(44,974,736)
Proceeds from sale of marketable securities	54,521,219	46,069,420	4,248,716
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(47,746,007)	(7,434,963)	(48,644,218)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on notes payable	(2,415,150)	(208,506)	(197,790)
Payments of taxes for net share settled restricted stock unit issuances		(54,667)	(438,838)
Proceeds from the exercises of warrants and stock options	8,275,410	3,631,164	272,818
Proceeds from the issuance of common stock	60,521,739	56,585,035	12,419,119
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	66,381,999	59,953,026	12,055,309
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	191,670,915	5,294,646	(60,527,881)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	30,133,213	24,838,567	85,366,448
CASH AND CASH EQUIVALENTS AT END OF PERIOD	221,804,128	30,133,213	24,838,567
Supplementary disclosures:
Interest Paid	(27,437)	(173,381)	(187,647)
Income Tax Credits Refunded			3,635,016
Income Tax Paid	$ (302,400)	$ (2,400)	$ (2,400)

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