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New Accounting Pronouncement (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Nov. 03, 2018
Nov. 03, 2018
Feb. 04, 2018
Feb. 03, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Accumulated deficit $ (61,998) $ (61,998)   $ (50,542)
Deferred revenue 2,800 2,800   $ 5,100
Revenue recognized 200 2,100    
Accrued revenue 1,100 1,100 $ 400  
Accrued revenue recognized 200 800    
Aggregate minimum licensing revenue   $ 64,000    
Contractual Rights On Revenue Recognized Period   10 years    
ASU 2014-09 | Adjustment        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Accumulated deficit 300 $ 300    
Revenue $ 200 $ 800