Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Gross Unrecognized Tax Benefits (Detail)

v3.6.0.2
Income Taxes - Summary of Gross Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]    
Balance at beginning of period $ 2,127 $ 1,991
Increases related to prior year tax positions 0 0
Increases related to tax positions 159 136
Balance at end of period $ 2,286 $ 2,127