Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.3.0.814
Stockholders' Equity - Additional Information (Detail) - $ / shares
Sep. 30, 2015
Dec. 31, 2014
Equity [Abstract]    
Common stock, shares issued 37,117,674 36,918,442
Common stock, shares outstanding 37,117,674 36,918,442
Common stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 25,000,000 25,000,000
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0