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Borrowings - Secured debentures (Details) - USD ($)
$ in Thousands
1 Months Ended
May 31, 2019
Feb. 28, 2018
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]        
Borrowings     $ 15 $ 36
Secured debentures        
Disclosure of detailed information about borrowings [line items]        
Proceeds from borrowings $ 3,000 $ 4,000    
Secured debentures | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Interest rate 10.00% 10.00%    
Deferred Financings Costs | Secured debentures        
Disclosure of detailed information about borrowings [line items]        
Borrowings   $ 40