Annual report pursuant to Section 13 and 15(d)

Common Stock - Summary of Fair Value of Warrants Issued (Detail)

v3.3.1.900
Common Stock - Summary of Fair Value of Warrants Issued (Detail) - Series A and Series B Warrants issued in July 2014 Financing [Member]
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rates 1.42% 1.51%
Expected dividend yield 0.00% 0.00%
Expected life 3 years 6 months 4 years 6 months
Expected volatility 77.00% 63.00%