XML 34 R43.htm IDEA: XBRL DOCUMENT v2.4.0.6
Shareholders' Equity Stock Grant Volatility (Details)
12 Months Ended
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Share-based Compensation [Abstract]      
Expected Volatility Rate, Minimum 97.00% 88.00% 80.00%
Expected Volatility Rate, Maximum 98.00% 96.00% 88.00%
Risk Free Interest Rate, Minimum 1.00% 1.30% 1.90%
Risk Free Interest Rate, Maximum 1.40% 2.70% 3.30%
Risk Free Interest Rate 1.00%    
Expected Term 6 years 6 years 6 years
Grant Term Limit 10 years    
Award Vesting Period 3 years    
Exercise Term Limit 10 years