Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting policies (Tables)

 v2.3.0.11
Summary of Significant Accounting policies (Tables)
3 Months Ended
Apr. 30, 2011
Summary of Significant Accounting Policies (Tables) [Abstract]  
Fair value of stock option using a Black Scholes valuation model
                 
    Three months ended
    April 30, 2011   May 1, 2010
Volatility rate
    54.4 %     55.0 %
Average risk-free interest rate
    2.8 %     3.1 %
Average expected life (in years)
    6.3       6.3  
Dividend yield
  None     None