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Equity - Accumulated other comprehensive income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
IFRS Statement [Line Items]      
Beginning balance $ (549)    
Exchange differences arising on translation of foreign operations 0 $ (2) $ 0
Changes in fair value of financial assets (5) (26) 9
Remeasurement of defined benefit pension plans 17 33 (14)
Ending balance (952) (549)  
Accumulated other Comprehensive income [member]      
IFRS Statement [Line Items]      
Beginning balance (549) (446) (1,554)
Exchange differences arising on translation of foreign operations (545) (334) 862
Changes in fair value of financial assets (30) (869) 313
Remeasurement of defined benefit pension plans 172 1,100 (67)
Ending balance (952) (549) (446)
Defined benefit pension plans [member]      
IFRS Statement [Line Items]      
Beginning balance 108 (992) (925)
Exchange differences arising on translation of foreign operations 0 0 0
Changes in fair value of financial assets 0 0 0
Remeasurement of defined benefit pension plans 172 1,100 (67)
Ending balance 280 108 (992)
Unrealized gain (losses) on securities [Member]      
IFRS Statement [Line Items]      
Beginning balance (906) (37) (350)
Exchange differences arising on translation of foreign operations 0 0 0
Changes in fair value of financial assets (30) (869) 313
Remeasurement of defined benefit pension plans 0 0 0
Ending balance (936) (906) (37)
Foreign currency translation [member]      
IFRS Statement [Line Items]      
Beginning balance 249 583 (279)
Exchange differences arising on translation of foreign operations (545) (334) 862
Changes in fair value of financial assets 0 0 0
Remeasurement of defined benefit pension plans 0 0 0
Ending balance $ (296) $ 249 $ 583