Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

v3.19.1
Stock-Based Compensation - Stock Option Activity (Details) - Options - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Employees    
Number of Shares    
Outstanding, beginning balance (in shares) 1,813,524  
Options granted (in shares) 400,648 1,813,524
Options reclassification from non-employee (in shares) 154,178  
Options reclassified to non-employee (in shares) (62,094)  
Outstanding, ending balance (in shares) 2,306,256 1,813,524
Options vested and exercisable (in shares) 1,517,151  
Weighted Average Exercise Price per Share    
Outstanding, beginning balance (in dollars per shares) $ 0.65  
Options granted (in dollars per share) 9.77 $ 0.65
Options reclassification from non-employee (in dollars per shares) 2.45  
Options reclassified to non-employee (in dollars per shares) 0.41  
Outstanding, end balance (in dollars per shares) 2.36 $ 0.65
Options vested and exercisable (in dollars per shares) $ 0.51  
Options    
Intrinsic value, Outstanding, beginning balance $ 13,894,762  
Intrinsic value, granted   $ 13,894,762
Intrinsic value, reclassified from non-employee 429,266  
Intrinsic value, Outstanding, end balance 6,182,252 $ 13,894,762
Intrinsic value, vested and exercisable $ 5,075,412  
Weighted average remaining contractual life, Outstanding, Beginning 8 years 9 months 18 days 9 years 8 months 12 days
Weighted average remaining contractual life, granted 9 years 6 months 9 years 8 months 12 days
Weighted average remaining contractual life, reclassified from non-employee 9 years 3 months 18 days  
Weighted average remaining contractual life, vested and exercisable 8 years 8 months 12 days  
Non-Employees    
Number of Shares    
Outstanding, beginning balance (in shares) 496,515  
Options granted (in shares) 111,465 496,515
Options reclassification from non-employee (in shares) 154,178  
Options reclassified to non-employee (in shares) (62,094)  
Options forfeited (in shares) (60,323)  
Options exercised (in shares) (17,676)  
Outstanding, ending balance (in shares) 437,897 496,515
Options vested and exercisable (in shares) 131,934  
Weighted Average Exercise Price per Share    
Outstanding, beginning balance (in dollars per shares) $ 0.41  
Options granted (in dollars per share) 9.50 $ 0.41
Options reclassification from non-employee (in dollars per shares) 2.45  
Options reclassified to non-employee (in dollars per shares) 0.41  
Options forfeited (in dollars per shares) 0.41  
Options exercised (in dollars per shares) 0.41  
Outstanding, end balance (in dollars per shares) 2.16 $ 0.41
Options vested and exercisable (in dollars per shares) $ 0.51  
Options    
Intrinsic value, Outstanding, beginning balance $ 3,922,238  
Intrinsic value, granted   $ 3,922,238
Intrinsic value, reclassified to non-employee 8,904  
Intrinsic value, Outstanding, end balance 1,228,838 $ 3,922,238
Intrinsic value, vested and exercisable $ 442,206  
Weighted average remaining contractual life, Outstanding, Beginning 8 years 9 months 18 days 9 years 7 months 6 days
Weighted average remaining contractual life, granted 9 years 2 months 12 days 9 years 7 months 6 days
Weighted average remaining contractual life, reclassified to non-employee 8 years 10 months 24 days  
Weighted average remaining contractual life, vested and exercisable 8 years 6 months