Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plan - Summary of Defined Contribution Plan (Detail)

v3.19.3.a.u2
Employee Benefit Plan - Summary of Defined Contribution Plan (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]      
Employee benefit plan expenses $ 228 $ 136 $ 93