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Financial obligations - Lease liabilities related to right in use (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
Disclosure of Financial obligations [Line Items]    
Lease liabilities $ 5,779 $ 7,839
Current portion 4,098 3,609
Non-current portion $ 1,681 4,230
Lease term 10 years  
Number of renewal options | item 2  
Lease renewal term 5 years  
Future minimum rentals payable $ 2,227 3,697
Less than 1 year    
Disclosure of Financial obligations [Line Items]    
Future minimum rentals payable 1,470 1,470
Between 2 and 5 years [member]    
Disclosure of Financial obligations [Line Items]    
Future minimum rentals payable $ 757 2,227
Minimum [Member]    
Disclosure of Financial obligations [Line Items]    
Lease term 1 year  
Maximum [Member]    
Disclosure of Financial obligations [Line Items]    
Lease term 3 years  
Buildings and other constructions    
Disclosure of Financial obligations [Line Items]    
Lease liabilities $ 2,532 3,971
Transportation units    
Disclosure of Financial obligations [Line Items]    
Lease liabilities 2,386 3,186
Machinery and equipment [Member]    
Disclosure of Financial obligations [Line Items]    
Lease liabilities $ 861 $ 682