Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.19.2
Employee Benefit Plan - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 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 $ 49,000 $ 27,000 $ 105,000 $ 76,000