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Derivative Financial Instruments - Components of Derivative Liabilities (Detail) - USD ($) | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Derivative [Line Items] |  |
Derivative liabilities | $ 2,482,190 | $ 2,226,445
Common shares linked to derivative liabilities | 4,737,104 | 4,737,104
Compound Embedded Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | $ 2,466,191 | $ 2,115,318
Common shares linked to derivative liabilities | 3,174,604 | 3,174,604
Warrant Derivatives [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | $ 15,999 | $ 111,127
Common shares linked to derivative liabilities | 1,562,500 | 1,562,500
Senior Convertible Notes [Member] | Warrant Derivatives [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | $ 15,999 | $ 111,127
Common shares linked to derivative liabilities | 1,562,500 | 1,562,500
2014 Convertible Promissory Notes [Member] | Compound Embedded Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | $ 2,466,191 | $ 2,115,318
Common shares linked to derivative liabilities | 3,174,604 | 3,174,604

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