Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Shareholders' Equity - Stock Option Awards - Stock Grant Volatility (Details) - Stock Options [Member]
6 Months Ended
Aug. 03, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected Volatility Rate, Minimum 75.00%
Expected Volatility Rate, Maximum 82.00%
Expected term (in years) 6 years
Risk Free Interest Rate, Minimum 1.90%
Risk Free Interest Rate, Maximum 2.60%