XML 28 R39.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Summary of Significant Accounting Policies Schedule of Estimated Useful Lives (Details)
12 Months Ended
Jan. 31, 2020
Computers and equipment  
Property, Plant and Equipment [Line Items]  
Property and equipment, useful life 3 years
Furniture and fixtures  
Property, Plant and Equipment [Line Items]  
Property and equipment, useful life 7 years
Capitalized internal-use software costs  
Property, Plant and Equipment [Line Items]  
Intangible asset, useful life 3 years