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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share for Out of Money Potential Common Shares (Parenthetical) (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	May. 10, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrants exercise price per share	$ 3.60	$ 3.60	$ 3.60	$ 3.60	$ 3.60
Stock Options With an Exercise Price of $1.04 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	1.04		1.04
Stock Options With an Exercise Price of $1.07 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	1.07		1.07
Stock Options With an Exercise Price of $1.74 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	1.74		1.74
Stock Options With an Exercise Price of $2.20 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	2.2		2.2
Stock Options With an Exercise Price of $2.73 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	2.73	2.73	2.73	2.73
Stock Options With an Exercise Price of $2.74 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	2.74	2.74	2.74	2.74
Stock Options With an Exercise Price of $2.89 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	2.89	2.89	2.89	2.89
Stock Options With an Exercise Price of $3.25 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	3.25	3.25	3.25	3.25
Stock Options With an Exercise Price of $3.40 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	3.40	3.40	3.40	3.40
Stock Options With an Exercise Price of $3.43 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	3.43	3.43	3.43	3.43
Stock Options With an Exercise Price of $3.50 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	3.50	3.50	3.50	3.50
Stock Options With an Exercise Price of $3.90 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options exercise price per share	$ 3.90	$ 3.90	$ 3.90	$ 3.90

X

- Definition

Exercise price of the option.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Article 12



-Section 13



-Footnote 5

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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)(4))



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

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