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Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) - USD ($) | Sep. 30, 2018 | Sep. 30, 2017
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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)

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