Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.19.3
Employee Benefit Plan - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 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 $ 58,000 $ 28,000 $ 163,000 $ 104,000