Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.19.1
Employee Benefit Plan - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Compensation Related Costs [Abstract]    
Defined contribution plan description We provide a 401(k) defined contribution plan for all regular full-time employees who have completed three months of service.  
Expenses to the plan by employer $ 56 $ 49