Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Disaggregation of Revenue by Region According to Location of Customers (Parenthetical) (Details)

v3.21.1
Revenue Recognition - Disaggregation of Revenue by Region According to Location of Customers (Parenthetical) (Details) - Revenue - Geographic Concentration Risk
3 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Disaggregation Of Revenue [Line Items]    
Percentage of Revenue 100.00% 100.00%
United States    
Disaggregation Of Revenue [Line Items]    
Percentage of Revenue 40.00% 33.00%
Japan    
Disaggregation Of Revenue [Line Items]    
Percentage of Revenue 15.00% 19.00%