Annual report pursuant to Section 13 and 15(d)

Defined Contribution Plan - Additional Information (Detail)

v3.20.1
Defined Contribution Plan - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Defined Contribution Benefit Plans [Line Items]    
Defined contribution plan maximum employee contribution as percentage of base salary 60.00%  
Defined benefit plan, contributions by employer $ 1.9 $ 1.9
First Five Percent Of Each Participants Contributions [Member]    
Defined Contribution Benefit Plans [Line Items]    
Defined contribution plan employer matching contribution to employee contribution 50.00%  
Defined contribution plan employee contributions percentage of eligible compensation 5.00%