Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Deferred tax assets:
Accrued compensation	$ 1,085,908	$ 1,337,619
Stock compensation	4,188,368	5,670,468
Capitalized research and development	1,227,137	2,196,542
Fixed Assets	404,836	203,477
Net operating losses	114,142,741	132,119,837
Intangible Assets	3,854,752	5,358,700
Deferred Revenue		1,068,206
Deferred Rent	566,535	865,675
Capital Loss	709,779	1,020,162
Total deferred tax assets	126,180,056	149,840,686
Valuation allowance	(116,875,075)	(136,625,436)
Deferred tax liabilities:
State taxes	(9,304,981)	(13,215,250)
Total deferred tax liability	$ (9,304,981)	$ (13,215,250)