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Derivative Financial Instruments - Changes in Fair Values of Derivative Liabilities (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Derivative [Line Items] |  |  |  |
Derivative income (expense) |  |  | $ (255,745) | $ 676,820
Total derivative income (expense) | $ (4,732) | $ 305,841 | (255,745) | 676,820
Senior Convertible Notes [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) |  |  |  | 47,243
2014 Convertible Promissory Notes [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) | (18,889) | (153,175) | (350,873) | (153,175)
Warrant Derivatives [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative income (expense) | $ 14,157 | $ 459,016 | $ 95,128 | $ 782,752

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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=56946850&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=56946850&loc=SL5624171-113959 + 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=56946850&loc=SL5618551-113959 + Details
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