Net Loss Per Share - Weighted Average Shares (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Numerator: | ||||||||
| Net Loss | $ (47,015) | $ (39,390) | $ (32,581) | $ (26,362) | $ (21,239) | $ (14,411) | $ (118,986) | $ (62,012) |
| Denominator: | ||||||||
| Weighted average common shares outstanding, basic and diluted | 79,115,305 | 62,311,111 | 78,357,791 | 26,662,233 | ||||
| Net loss per share, basic and diluted | $ (0.59) | $ (0.42) | $ (1.52) | $ (2.33) | ||||