Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Additional Information (Detail)

v3.6.0.2
Property and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Abstract]    
Total depreciation expense recorded $ 0.6 $ 0.6