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Income Taxes - Company's Net Deferred Tax Assets and Liabilities (Detail) - USD ($) | Sep. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 9,824,977 | $ 11,401,483
Foreign deferred assets | 258,106 |
Stock based compensation | 2,333,210 | 1,228,082
AMT credit carryforwards | 149,346 | 66,320
Other, net | 304,854 | 250,999
Research credit carryforwards | 43,802 | 43,802
Total deferred assets | 12,914,295 | 12,990,686
Deferred tax liabilities: |  |
Intangibles | (603,774) |
Foreign deferred liabilities | (414,820) |
Net deferred tax asset | 11,895,701 | 12,990,686
Valuation allowance for net deferred tax assets | (12,052,415) | $ (12,990,686)
Net deferred tax liability | $ (156,714) |

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