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Stockholders' Equity (Details Textual) |  |  |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 08, 2015 shares | May 05, 2015 USD ($) $ / shares shares | May 22, 2014 shares | May 14, 2010 shares | Jun. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) plan $ / shares shares | Sep. 30, 2015 USD ($) | May 13, 2016 shares
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Maximum authorized amount | $ |  |  |  |  | $ 50,000,000.0 |  |  |
Agent fee |  |  |  |  | 2.00% |  |  |
Stock issued during period (shares) |  | 10,925,000 |  |  |  | 568,248 |  |
Offering price ($ per share) | $ / shares |  | $ 8.00 |  |  |  | $ 9.80 |  |
Proceeds | $ |  |  |  |  |  | $ 5,458,284 | $ 81,902,363 |
Proceeds from initial public offering | $ |  | $ 81,900,000 |  |  |  |  |  |
Number of plans | plan |  |  |  |  |  | 2 |  |
Award vesting period |  |  |  |  |  | 3 years |  |
Maximum contractual term |  |  |  |  |  | 10 years |  |
2016 Incentive Plan |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Number of potential shares authorized for issuance under share based compensation plan (shares) |  |  |  |  |  |  |  | 2,000,000
Number of shares authorized (shares) |  |  |  |  |  |  |  | 6,000,000
Stock and Cash Based Incentive Plan [Member] |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Number of additional shares authorized (shares) | 2,000,000 |  | 1,250,000 | 500,000 |  |  |  |
Number of potential shares authorized for issuance under share based compensation plan (shares) |  |  |  | 513,833 |  |  |  |
Number of shares authorized (shares) |  |  |  |  |  | 7,770,497 |  |
Number of shares available for grant (shares) |  |  |  |  |  | 322,727 |  |
Number of shares of unvested restricted stock units and options outstanding (shares) |  |  |  |  |  | 771,335 |  |
Common stock, other shares, outstanding (shares) |  |  |  |  |  | 5,910,921 |  |
Amended 2000 Stock Option Plan [Member] |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Options outstanding (shares) |  |  |  |  |  | 100,002 |  |
VGX Equity Compensation Plan [Member] |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Options outstanding (shares) |  |  |  |  |  | 737,038 |  |
Over-Allotment Option [Member] |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |
Stock issued during period (shares) |  | 1,425,000 |  |  |  |  |  |

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