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Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Jan. 28, 2017
Income Taxes          
Income tax (benefit) provision $ (889) $ (489) $ 665 $ 1,936  
Effective tax rate (as a percent)     (26.10%) (35.90%) (69.80%)
Total amount of interest and penalties recognized 35 $ 0 $ 99    
Total amount of accrued interest and penalties $ 275   $ 275   $ 167
Federal tax          
Income Taxes          
Period of statute of limitations     3 years    
State tax          
Income Taxes          
Period of statute of limitations     4 years