Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Schedule of Assumptions Used to Determine Grant Date Fair Value of Employee and Director Options Granted (Details)

v3.10.0.1
Share-Based Compensation - Schedule of Assumptions Used to Determine Grant Date Fair Value of Employee and Director Options Granted (Details) - $ / shares
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Volatility 60.00% 60.00%
Expected term in years 6 years 3 months 6 years 3 months
Dividend rate 0.00% 0.00%
Risk-free interest rate   1.63%
Risk-free interest rate, minimum 2.16%  
Risk-free interest rate, maximum 2.63%  
Share price   $ 3.30
Fair value of option on grant date   $ 1.88
Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share price $ 9.06  
Fair value of option on grant date 5.28  
Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share price 13.00  
Fair value of option on grant date $ 7.49