Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.7.0.1
Employee Benefit Plan - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Defined Contribution Plan Disclosure [Line Items]        
Defined contribution plan description     The Company provides a 401(k) defined contribution plan (the Plan) for participation by all regular fulltime employees who have completed three months of service  
Percentage of matching contribution to plan     100.00%  
Percentage of salary for matching contribution per employee     3.00%  
Percentage of additional matching contribution to plan     50.00%  
Contributions to the plan by employer $ 18 $ 14 $ 45 $ 32
Minimum [Member]        
Defined Contribution Plan Disclosure [Line Items]        
Percentage of salary for additional matching contribution per employee     3.00%  
Maximum [Member]        
Defined Contribution Plan Disclosure [Line Items]        
Percentage of salary for additional matching contribution per employee     5.00%