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Leases - ASC 842 Minimum Lease Payments (Details) - USD ($) $ in Thousands | Oct. 31, 2020 | Jan. 31, 2020 | Oct. 31, 2019
--- | --- | --- | ---
Leases [Abstract] |  |  |
Remaining of 2021 | $ 1,476 |  |
2022 | 5,818 |  |
2023 | 5,384 |  |
2024 | 5,251 |  |
2025 | 5,370 |  |
Thereafter | 1,350 |  |
Remaining balance of lease payments | 24,649 |  |
Short-term lease liabilities | 4,662 | $ 3,654 | $ 3,506
Long-term lease liabilities | 16,745 | $ 19,787 | $ 20,778
Total lease liabilities | 21,407 |  |
Difference between undiscounted cash flows and discounted cash flows | $ 3,242 |  |

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