Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2019 |
Apr. 30, 2018 |
|
| Finance lease cost: | ||
| Amortization of right-of-use assets | $ 994 | $ 0 |
| Interest on lease liabilities | 905 | $ 0 |
| Operating lease cost | 967 | |
| Short-term lease cost | 395 | |
| Total lease cost | $ 3,261 | |