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Fair Value Measurements - Summary of Outstanding Balance Sheet Hedges (Detail) - Foreign currency derivative contracts - USD ($)
$ in Thousands
Apr. 30, 2020
Jan. 31, 2020
Prepaid expenses and other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 13 $ 75
Accrued expenses    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 74 $ 42