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Shareholders' Equity - Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
May 02, 2019
Nov. 27, 2018
May 04, 2019
Class of Warrant or Right [Line Items]      
Warrants outstanding     8,849,365
Warrants exercisable     7,474,365
Warrant exercise period 5 years    
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 November 2018 [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding   1,500,000  
Award Vesting Period   3 years  
Total grant date fair value   $ 441  
Compensation Expense     $ 37
Unrecognized compensation cost related to non-vested awards     $ 378
Period for recognition of unrecognized compensation cost     2 years 6 months 25 days
Warrants Granted November 2018 - $1.05 Tranche [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding     500,000
Warrants exercisable     125,000
Exercise Price (Per Share)     $ 1.05
Expiration Date     Nov. 27, 2025
Warrants Granted November 2018 - $3.00 Tranche [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding     1,000,000
Warrants exercisable     0
Exercise Price (Per Share)     $ 3.00
Expiration Date     Nov. 27, 2025
Number of consecutive trading days   30 days  
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
Minimum [Member]      
Class of Warrant or Right [Line Items]      
Warrant exercise period     5 years
Maximum [Member]      
Class of Warrant or Right [Line Items]      
Warrant exercise period     7 years
Tranche vesting on first anniversary [Member]      
Class of Warrant or Right [Line Items]      
Award Vesting Period 1 year    
Tranche vesting on first anniversary [Member] | Warrants Granted November 2018 - $1.05 Tranche [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding   125,000  
Tranche vesting on second anniversary [Member] | Warrants Granted November 2018 - $1.05 Tranche [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding   125,000  
Tranche vesting on third anniversary [Member] | Warrants Granted November 2018 - $1.05 Tranche [Member]      
Class of Warrant or Right [Line Items]      
Warrants outstanding   125,000