Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Warrants (Details)

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Shareholders' Equity - Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
May 02, 2019
Nov. 27, 2018
Aug. 03, 2019
Nov. 02, 2019
Nov. 03, 2018
Class of Warrant or Right [Line Items]          
Warrants outstanding       7,349,365  
Warrants exercisable       7,349,365  
Warrant exercise period 5 years     5 years  
Share-based compensation expense       $ 1,683 $ 2,180
Warrants Granted September 2016 [Member]          
Class of Warrant or Right [Line Items]          
Warrants outstanding       2,976,190  
Warrants exercisable       2,976,190  
Exercise Price (Per Share)       $ 2.90  
Expiration Date       Sep. 19, 2021  
Warrants Granted November 2016 [Member]          
Class of Warrant or Right [Line Items]          
Warrants outstanding       333,873  
Warrants exercisable       333,873  
Exercise Price (Per Share)       $ 3.00  
Expiration Date       Nov. 10, 2021  
Warrants Granted January 2017 [Member]          
Class of Warrant or Right [Line Items]          
Warrants outstanding       489,302  
Warrants exercisable       489,302  
Exercise Price (Per Share)       $ 1.76  
Expiration Date       Jan. 23, 2022  
Warrants Granted March 2017 [Member]          
Class of Warrant or Right [Line Items]          
Warrants outstanding       50,000  
Warrants exercisable       50,000  
Exercise Price (Per Share)       $ 1.92  
Expiration Date       Mar. 16, 2022  
Warrants Granted May 2019 [Member]          
Class of Warrant or Right [Line Items]          
Warrants outstanding       3,500,000  
Warrants exercisable       3,500,000  
Exercise Price (Per Share)       $ 1.50  
Expiration Date       May 02, 2024  
Warrants Granted November 2018 [Member]          
Class of Warrant or Right [Line Items]          
Warrants issued   1,500,000      
Award Vesting Period   3 years      
Total grant date fair value   $ 441      
Warrant shares forfeited     1,500,000