Consolidated Statements of Operations and Comprehensive Loss - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
REVENUE	$ 31,407,709	$ 158,333	$ 382,000
OPERATING EXPENSES
Research and development	31,690,298	41,454,452	47,267,361
Acquired in-process research and development			10,142,786
Salaries and payroll-related costs	17,292,883	19,461,656	16,554,008
General and administrative expenses	6,838,402	9,940,737	7,931,184
Stock-based compensation	7,891,595	11,595,816	10,232,897
Depreciation and amortization	4,690,440	3,260,045	2,336,207
Impairment expense		2,050,817
Contingent consideration - fair value adjustments		(5,862,464)	1,891,533
TOTAL OPERATING EXPENSES	68,403,618	81,901,059	96,355,976
OPERATING LOSS	(36,995,909)	(81,742,726)	(95,973,976)
OTHER INCOME (EXPENSE)
Gain (loss) on sale of fixed asset, net			19,195
Interest income (expense), net	415,128	265,794	729,158
Change in value of derivatives	890,362	(301,022)	2,869,267
Other income (expense)	1,312,524	57,352	417,874
TOTAL OTHER INCOME (EXPENSE)	2,618,014	22,124	4,035,494
LOSS BEFORE INCOME TAXES	(34,377,895)	(81,720,602)	(91,938,482)
Provision for income taxes	(2,400)	(2,400)	(2,400)
NET LOSS	$ (34,380,295)	$ (81,723,002)	$ (91,940,882)
NET LOSS PER SHARE - BASIC & DILUTED	$ (0.47)	$ (1.34)	$ (1.60)
Weighted average shares outstanding - basic and diluted	73,898,598	61,050,880	57,358,442
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign Currency Translation Adjustments	$ 25,783	$ 143,874	$ (136,425)
COMPREHENSIVE LOSS	$ (34,354,512)	$ (81,579,128)	$ (92,077,307)