Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Additional Information (Detail)

v3.20.4
Property and Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment Net By Type [Abstract]      
Depreciation and amortization expense $ 8,332 $ 7,070 $ 3,732