Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Warrants (Details)

v3.20.1
Shareholders' Equity - Warrants (Details) - $ / shares
3 Months Ended
May 02, 2019
May 02, 2020
Class of Warrant or Right [Line Items]    
Warrants outstanding   1,102,127
Warrants exercisable   734,930
Warrant exercise period 5 years 5 years
Warrants Granted September 2016 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   297,616
Warrants exercisable   297,616
Exercise Price (Per Share)   $ 29.00
Expiration Date   Sep. 19, 2021
Warrants Granted November 2016 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   33,386
Warrants exercisable   33,386
Exercise Price (Per Share)   $ 30.00
Expiration Date   Nov. 10, 2021
Warrants Granted January 2017 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   48,930
Warrants exercisable   48,930
Exercise Price (Per Share)   $ 17.60
Expiration Date   Jan. 23, 2022
Warrants Granted March 2017 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   5,000
Warrants exercisable   5,000
Exercise Price (Per Share)   $ 19.20
Expiration Date   Mar. 16, 2022
Warrants Granted May 2019 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   349,998
Warrants exercisable   349,998
Exercise Price (Per Share)   $ 15.00
Expiration Date   May 02, 2024
Warrants Granted April 2020 [Member]    
Class of Warrant or Right [Line Items]    
Warrants outstanding   367,197
Warrants exercisable   0
Exercise Price (Per Share)   $ 2.66
Expiration Date   Apr. 14, 2025