Geographic Information - Revenue by Location (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2019 |
Apr. 30, 2018 |
|
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Revenue | $ 37,314 | $ 25,020 |
| United States | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Revenue | 29,468 | 20,217 |
| International | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Revenue | $ 7,846 | $ 4,803 |