Summary of Significant Accounting Policies - Schedule of Property, Plant and Equipment Useful Lives (Details)	12 Months Ended
	Jan. 31, 2020
Computer and office equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Computer and office equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Purchased software | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Purchased software | Maximum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Servers
Property, Plant and Equipment [Line Items]
Useful life	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	5 years
Building | Minimum
Property, Plant and Equipment [Line Items]
Useful life	40 years