Share-Based Compensation - Valuation Assumptions (Details) (Stock Option [Member])
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Stock Option [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 1.86% [1] 1.14% [1] 1.12% [1]
Price volatility 53.70% [2] 55.90% [2] 55.90% [2]
Expected Term 6 years 3 months [3] 6 years 2 months 13 days [3] 6 years 2 months 1 day [3]
Equity dividend yield 0.00% [4] 0.00% [4] 0.00% [4]
[1] Represents the yield on U.S. Treasury securities with a term consistent with the expected term of the stock options.
[2] For the first two years following the initial public offering of the Company's common stock, this was based on the historical volatility of selected comparable companies over a period consistent with the expected term of the stock options because the Company had a limited history of being publicly traded. Comparable companies were selected primarily based on industry, stage of life cycle, and size. Beginning with the second anniversary of the IPO in May 2012, the Company began using its own volatility as an additional input in the determination of expected volatility.
[3] Calculated utilizing the “simplified” methodology prescribed by SAB No. 107 due to the lack of historical exercise data necessary to provide a reasonable basis upon which to estimate the term.
[4] The Company does not currently plan on paying regular dividends.