v3.8.0.1
Significant Accounting Policies - Concentration of Credit Risk and Significant Customers (Details) - Customer Concentration Risk - Accounts Receivable
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Customer A    
Concentration Risk [Line Items]    
Concentration of risk percentage 22.00% 27.00%
Customer B    
Concentration Risk [Line Items]    
Concentration of risk percentage 17.00% 15.00%
Customer C    
Concentration Risk [Line Items]    
Concentration of risk percentage 16.00% 14.00%
Customer D    
Concentration Risk [Line Items]    
Concentration of risk percentage   11.00%