Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 35,934,235	$ (28,083,189)
Change in value of derivatives		(432,141)
Stock-based compensation	5,318,882	3,549,354
Depreciation and amortization	2,353,319	2,294,639
Amortization/(accretion) of note premiums	330,229	346,339
Changes in operating assets and liabilities:
Accounts receivable	(13,094,965)	51,510
Prepaid expenses and Other Current Assets	(1,440,287)	1,225,562
Deferred revenue	120,622,138	(3,704,740)
Accounts payable	1,256,092	(2,266,082)
Accrued expenses	(2,340,651)	(2,918,752)
Other	(240,737)	(196,434)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	148,698,255	(30,133,934)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(946,788)	(513,719)
Purchases of marketable securities	(90,266,001)	(5,018,040)
Proceeds from sale of marketable securities	12,239,219	23,704,420
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(78,973,570)	18,172,661
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on notes payable	(2,415,150)	(102,406)
Payments of taxes for net share settled restricted stock unit issuances		(54,667)
Proceeds from the exercises of warrants and stock options	3,674,731	499,861
Proceeds from the issuance of common stock	60,521,729	56,585,035
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	61,781,310	56,927,823
NET INCREASE (DECREASE) IN CASH	131,505,995	44,966,550
CASH AT BEGINNING OF PERIOD	30,133,213	24,838,567
CASH AT END OF PERIOD	161,639,208	69,805,117
Supplementary disclosures:
Interest Paid	(27,437)	(88,537)
Income Taxes Paid	$ (2,400)	$ (2,400)