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Summary of Significant Accounting Policies - Property And Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 29, 2016
Oct. 31, 2015
Oct. 29, 2016
Oct. 31, 2015
Jan. 30, 2016
Property and Equipment          
Less: Accumulated depreciation $ (2,011)   $ (2,011)   $ (1,631)
Property and Equipment, net 1,124   1,124   1,151
Depreciation expense 137 $ 115 393 $ 322  
Computer Equipment          
Property and Equipment          
Property and Equipment, gross 589   $ 589   561
Estimated useful life     3 years    
Software          
Property and Equipment          
Property and Equipment, gross 174   $ 174   79
Estimated useful life     3 years    
Furniture and Fixtures          
Property and Equipment          
Property and Equipment, gross 1,936   $ 1,936   1,706
Furniture and Fixtures | Maximum          
Property and Equipment          
Estimated useful life     7 years    
Leasehold Improvements          
Property and Equipment          
Property and Equipment, gross $ 436   $ 436   $ 436
Leasehold Improvements | Maximum          
Property and Equipment          
Estimated useful life     5 years