Accrued Payroll and Benefits - Schedule of Accrued Payroll and Benefits (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Accrued bonuses	$ 5,416	$ 3,449
Accrued paid time off	2,067	2,154
Accrued payroll	9,133	4,470
Accrued other	4,565	959
Total accrued payroll and benefits	$ 21,181	$ 11,032