Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) - USD ($)	Sep. 30, 2017	Sep. 30, 2016
Deferred tax assets:
Accrued compensation	$ 1,337,619	$ 1,691,050
Stock compensation	5,670,468	7,224,958
Capitalized research and development	2,196,542	2,957,528
Fixed Assets	203,477
Net operating losses	132,119,837	125,120,957
Intangible Assets	5,358,700	5,544,091
Deferred Revenue	1,068,206
Deferred Rent	865,675
Capital Loss	1,020,162
Total deferred tax assets	149,840,686	142,538,584
Valuation allowance	(136,625,436)	(128,695,371)
Deferred tax liabilities:
State taxes	(13,215,250)	(13,804,268)
Fixed assets		(38,945)
Total deferred tax liability	$ (13,215,250)	$ (13,843,213)