Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Reconciliation of Unrecognized Tax Benefit Activity (Detail)

v3.6.0.2
Income Taxes - Summary of Reconciliation of Unrecognized Tax Benefit Activity (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]    
Beginning unrecognized tax benefits $ 1,408,000 $ 1,408,000
Decreases related to prior year tax positions (53,000)
Increases related to current year tax positions 177,000
Ending unrecognized tax benefits $ 1,532,000 $ 1,408,000