Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Additional Information (Detail)

v3.19.1
Property and Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Property Plant And Equipment Net By Type [Abstract]    
Depreciation and amortization expense $ 1,648 $ 333