Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.7.0.1
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Feb. 07, 2017
Jun. 30, 2017
Dec. 31, 2016
Equity [Abstract]      
Preferred stock, shares authorized   10,000,000 10,000,000
Preferred stock, par value   $ 0.0001 $ 0.0001
Common stock, shares authorized   100,000,000 100,000,000
Common stock, par value   $ 0.0001 $ 0.0001
Shares of common stock issued 5,181,348    
Common stock offering price $ 1.93    
Net proceeds from public offering $ 9.2