Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities - Additional Information (Detail)

v3.8.0.1
Accrued Liabilities - Additional Information (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Accrued liabilities $ 636 $ 363