Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2019 |
Apr. 30, 2018 |
|
| Numerator: | ||
| Net loss | $ (19,809) | $ (14,330) |
| Denominator: | ||
| Weighted-average common shares outstanding (in shares) | 105,595 | 21,008 |
| Net loss per share, basic and diluted (in dollars per share) | $ (0.19) | $ (0.68) |