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Business segment information (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Reporting Segment [Line Items]      
Revenue $ 99,157 $ 126,657 $ 127,589
Non-current assets [1] 21,411 23,673 8,319
Panama      
Disclosure of Reporting Segment [Line Items]      
Revenue 7,580 8,649 13,913
Non-current assets [1] 19,888 20,976 6,520
Mexico      
Disclosure of Reporting Segment [Line Items]      
Revenue 14,480 18,757 14,577
Non-current assets [1] 535 1,510 1,495
Colombia      
Disclosure of Reporting Segment [Line Items]      
Revenue 13,462 10,348 15,440
Non-current assets [1] 56 55 7
Brazil      
Disclosure of Reporting Segment [Line Items]      
Revenue 7,054 13,122 17,887
Non-current assets [1] 129 222 126
Costa Rica      
Disclosure of Reporting Segment [Line Items]      
Revenue 7,142 10,702 11,115
Non-current assets [1] 0 0 0
Ecuador      
Disclosure of Reporting Segment [Line Items]      
Revenue 9,242 13,640 10,414
Non-current assets [1] 0 0 0
ARGENTINA      
Disclosure of Reporting Segment [Line Items]      
Revenue 8,163 14,889 9,959
Non-current assets [1] 212 185 37
Other [Member]      
Disclosure of Reporting Segment [Line Items]      
Revenue 32,034 36,550 34,284
Non-current assets [1] $ 591 $ 725 $ 134
[1] Includes equipment and lesehold improvements, intangibles and investment properties