Common Stock and Stockholders' Equity (Deficit) - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands |
1 Months Ended |
3 Months Ended |
12 Months Ended |
Mar. 31, 2019 |
Apr. 30, 2019 |
Jan. 31, 2019 |
| Number of Shares |
|
|
|
| Outstanding, beginning balance (in shares) |
|
14,006,222
|
|
| Granted (in shares) |
3,041,000
|
3,682,821
|
|
| Exercised (in shares) |
|
(951,830)
|
|
| Forfeited (in shares) |
|
(208,525)
|
|
| Outstanding, ending balance (in shares) |
|
16,528,688
|
14,006,222
|
| Weighted Average Exercise Price |
|
|
|
| Outstanding, beginning balance, weighted average exercise price (in dollars per share) |
|
$ 4.32
|
|
| Granted, weighted average exercise price (in dollars per share) |
|
15.04
|
|
| Exercised, weighted average exercise price (in dollars per share) |
|
2.37
|
|
| Forfeited, weighted average exercise price (in dollars per share) |
|
6.13
|
|
| Outstanding, ending balance, weighted average exercise price (in dollars per share) |
|
$ 6.80
|
$ 4.32
|
| Weighted Average Remaining Contractual Term |
|
|
|
| Outstanding, weighted average remaining contractual term |
|
8 years 4 months 24 days
|
8 years 2 months 12 days
|
| Aggregate Intrinsic Value |
|
|
|
| Outstanding, aggregate intrinsic value |
|
$ 662,726
|
$ 142,840
|
| Vested |
|
|
|
| Vested, number of shares (in shares) |
|
5,743,831
|
|
| Vested, weighted average exercise price (in dollars per share) |
|
$ 2.74
|
|
| Vested, weighted average remaining contractual term |
|
7 years 4 months 24 days
|
|
| Vested, aggregate intrinsic value |
|
$ 253,662
|
|