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Commitments and Contingencies - Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Operating Leased Assets    
Operating leases, rent expense $ 640 $ 696
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity    
2015 2,000  
2016 1,493  
2017 443  
2018 85  
2019 38  
Total 4,059  
January 1, 2015 to December 31, 2016    
Operating Leased Assets    
Operating leases, purchase option price 8,400  
Year ending December 2017    
Operating Leased Assets    
Operating leases, purchase option price 8,600  
Year ending December 2018    
Operating Leased Assets    
Operating leases, purchase option price $ 8,800