Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.3.0.814
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Jul. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Equity [Abstract]      
Common stock, shares authorized   100,000,000 100,000,000
Common stock, par value   $ 0.0001 $ 0.0001
Shares issued in underwritten public offering 8,188,000    
Common stock offering price $ 2.81    
Net proceeds from underwritten public offering $ 21.1