Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Summary of Number of Options Outstanding and Weighted-average Exercise Price (Details)

v3.10.0.1
Share-Based Compensation - Summary of Number of Options Outstanding and Weighted-average Exercise Price (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Compensation Related Costs [Abstract]    
Number of Shares, Options outstanding Beginning Balance 248,128  
Number of Shares, Granted 449,986  
Number of Shares, Options outstanding Ending Balance 698,114 248,128
Number of Shares, Vested at September 30, 2018 (unaudited) 78,862  
Number of Shares, Exercisable at September 30, 2018 (unaudited) 78,862  
Weighted Average Exercise Price, Options outstanding Beginning Balance $ 3.31  
Weighted Average Exercise Price, Granted 12.97  
Weighted Average Exercise Price, Options outstanding Ending Balance 9.54 $ 3.31
Weighted Average Exercise Price, Exercisable at September 30, 2018 (unaudited) $ 3.24  
Weighted Average Remaining Contractual Life in Years, Options outstanding 9 years 3 months 7 days 9 years 5 months 8 days
Weighted Average Remaining Contractual Life in Years, Granted 9 years 7 months 28 days  
Weighted Average Remaining Contractual Life in Years, Exercisable at September 30, 2018 (unaudited) 8 years 4 months 24 days  
Aggregate Intrinsic Value, Options outstanding $ 821  
Aggregate Intrinsic Value, Exercisable at September 30, 2018 (unaudited) $ 267