Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3.a.u2
Shareholders' Equity - Stock Option Awards - Stock Grant Volatility (Details) - Stock Options [Member]
9 Months Ended
Nov. 02, 2019
Nov. 03, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected Volatility Rate, Minimum 75.00% 72.00%
Expected Volatility Rate, Maximum 82.00% 72.00%
Expected term (in years) 6 years 6 years
Risk Free Interest Rate, Minimum 1.40% 2.80%
Risk Free Interest Rate, Maximum 2.60% 3.00%