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Warrant Liability - Summary of Warrant Liability (Detail) - USD ($)	Mar. 31, 2016	Dec. 31, 2011
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

X

- 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

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+ 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))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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+ 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

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