Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) - USD ($)	Sep. 30, 2019	Sep. 30, 2018
Deferred tax assets:
Accrued compensation	$ 1,310,466	$ 1,085,908
Stock compensation	3,609,756	4,188,368
Capitalized research and development	926,026	1,227,137
Fixed Assets	438,882	404,836
Net operating losses	105,372,571	114,142,741
Intangible Assets	3,590,090	3,854,752
California Alternative Minimum Tax	173,553
Deferred Rent	821,317	566,535
Capital Loss	709,779	709,779
Total deferred tax assets	116,952,440	126,180,056
Valuation allowance	(108,232,402)	(116,875,075)
Deferred tax liabilities:
State taxes	(8,720,038)	(9,304,981)
Total deferred tax liability	$ (8,720,038)	$ (9,304,981)