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Stock Grant Volatility (Details)
9 Months Ended
Nov. 01, 2014
Nov. 02, 2013
Share-based Compensation [Abstract]    
Award Vesting Period 3 years  
Expected Volatility Rate, Minimum 93.00% 98.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum 98.00% 100.00%
Risk Free Interest Rate, Minimum 1.50% 1.10%
Risk Free Interest Rate, Maximum 2.20% 2.10%
Expected Term 5 years 5 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Maximum Expected Term 6 years 6 years
Grant Term Limit 10 years  
Exercise Term Limit 10 years