Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Stock Option Awards - Stock Grant Volatility (Details)

v3.10.0.1
Shareholders' Equity - Stock Option Awards - Stock Grant Volatility (Details) - Stock Options [Member]
9 Months Ended
Nov. 03, 2018
Oct. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected Volatility Rate, Minimum 72.00% 81.00%
Expected Volatility Rate, Maximum 72.00% 81.00%
Expected term (in years) 6 years 6 years
Risk Free Interest Rate, Minimum 2.80% 2.00%
Risk Free Interest Rate, Maximum 3.00% 2.20%