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Warrant Liability - Summary of Warrant Liability (Detail) - USD ($) | Mar. 31, 2016 | Dec. 31, 2011
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Class of Warrant or Right [Line Items] |  |
Number Outstanding | 3,772,068 |
Fair Value | $ 6,159,671 |
Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Exercise Price per share | $ 3.60 |
Series B Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Exercise Price per share | $ 5.04 |
December 2011 Financing [Member] | Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number Outstanding | 578,074 |
Exercise Price per share | $ 3.60 |
Fair Value | $ 511,594 |
December 2011 Financing [Member] | Series B Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Exercise Price per share |  | $ 15.00
March 2016 Financing [Member] | Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number Outstanding | 1,277,598 |
Exercise Price per share | $ 3.60 |
Fair Value | $ 1,760,937 |
March 2016 Financing [Member] | Series B Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number Outstanding | 1,916,396 |
Exercise Price per share | $ 5.04 |
Fair Value | $ 3,887,140 |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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