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Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) (USD $) | Sep. 30, 2014 | Sep. 30, 2013
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Deferred tax assets: |  |
Reserve for other receivables | $ 233,014 | $ 1,026,010
Accrued compensation | 1,313,354 | 159,015
Stock compensation | 3,011,369 | 1,269,020
Capitalized research and development | 13,536,745 | 3,985,025
Fair value adjustments | 1,864,364 | 749,030
Net operating losses | 42,268,526 | 52,133,035
Total deferred tax assets | 62,227,372 | 59,321,135
Valuation allowance | (55,224,802) | (52,214,090)
Deferred tax liabilities: |  |
State taxes | (6,277,587) | (5,042,010)
Equity investments | (7,675) |
Intangible assets | (475,829) | (1,521,015)
Fixed assets | (241,479) | (544,020)
Total deferred tax liability | (7,002,570) | (7,107,045)
Net deferred tax assets |  |

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