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Equity Financing - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 17, 2016 | Aug. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016
Class of Warrant or Right [Line Items] |  |  |  |
Proceeds from exercise of warrants |  | $ 516,000 | $ 3,044,035 |
2015 Warrants [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Warrant exercise price | $ 1.10 |  | $ 10.20 |
Number of warrants exercised | 2,475,776 |  |  |
Number of shares issued upon warrants exercise | 2,475,776 |  |  |
Proceeds from exercise of warrants | $ 2,723,000 |  |  |
Series A Warrants [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Warrant exercise price |  | $ 0.30 |  | $ 3.60
Number of warrants exercised |  | 1,187,190 |  |
Number of warrants outstanding |  | 1,277,609 |  |
2011 Series A Warrant [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Warrant exercise price |  | $ 0.30 |  |
Number of warrants exercised |  | 531,814 |  |
Number of shares issued upon warrants exercise |  | 531,814 |  |
Number of warrants outstanding |  | 578,081 |  |
Series B Warrants [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Warrant exercise price |  | $ 0.30 |  | $ 5.04
Number of warrants outstanding |  | 1,916,407 |  |
Number of warrants surrendered |  | 1,546,360 |  |
Series A and B Warrants [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Number of shares issued upon warrants exercise |  | 1,719,004 |  |

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