Basis of Presentation and Summary of Significant Accounting Policies - Schedules of Concentration of Revenue and Accounts Receivable (Parenthetical) (Details) - Revenue - Partner A - Customer Concentration Risk	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Accounting Policies [Line Items]
Concentration risk percentage	26.00%
Maximum
Accounting Policies [Line Items]
Concentration risk percentage		10.00%	10.00%