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Intangible Assets - Summary of Expected Annual Amortization Expense Related to Software Licenses (Detail) - USD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
Finite Lived Intangible Assets [Line Items]    
Net Carrying Amount $ 17,826 $ 10,936
Internal-use software license [Member]    
Finite Lived Intangible Assets [Line Items]    
2021 5,789  
2022 4,519  
2023 3,418  
2024 0  
2025 0  
Thereafter 0  
Net Carrying Amount $ 13,726 $ 6,836