Income Taxes (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2019 |
Apr. 30, 2018 |
Jan. 31, 2019 |
|
| Income Tax Disclosure [Abstract] | |||
| Income tax expense | $ 245 | $ 104 | |
| Unrecognized tax benefits | 7,100 | $ 6,600 | |
| Unrecognized tax benefits that would affect effective tax rate if recognized | $ 1,000 | ||