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Derivative Financial Instruments - Changes in Fair Values of Derivative Liabilities (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Derivative [Line Items] |  |  |  |
Derivative income (expense) | $ 3,748 | $ (4,732) | $ 1,945,448 | $ (255,745)
Total derivative income (expense) | 3,748 | (4,732) | 3,402,273 | (255,745)
2014 Convertible Promissory Notes [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) |  | (18,889) | 1,939,366 | (350,873)
Redemption of Senior Convertible Notes [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) |  |  | 1,456,825 |
Warrant Derivatives [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) | $ 3,748 | $ 14,157 | $ 6,082 | $ 95,128

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 + Details
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