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Leases - Components of Operating Lease Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Operating lease cost $ 4,466 $ 4,590 $ 4,902
Short-term lease cost 432 502 866
Total operating lease cost 4,898 5,092 5,768
Operating cash outflows from operating leases included in measurement of lease liabilities 4,857 4,831 4,150
New ROU assets obtained in exchange for lease obligations $ 2,548 $ 2,337 $ 6,439
Weighted average remaining lease term (years) (Year) 3 years 3 months 18 days 3 years 9 months 18 days  
Weighted average discount rate (%) 2.10% 2.50%