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Income Taxes (Details 2) - USD ($)
$ in Millions
Feb. 03, 2018
Jan. 28, 2017
Operating loss carryforwards    
Net operating loss carryforwards $ 74.7  
Operating loss carryforwards that have an unlimited carryforward life 17.1  
Valuation allowance 20.4 $ 13.9
Foreign    
Operating loss carryforwards    
Net operating loss carryforwards 57.0  
State    
Operating loss carryforwards    
Net operating loss carryforwards $ 0.6