XML 120 R105.htm IDEA: XBRL DOCUMENT v3.21.1
Employee benefits - Movements in present value of the defined benefit obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Employee benefits    
Balance at beginning of year $ 3,142 $ 3,184
Service costs 6 26
Interest expense 27 121
Actuarial loss (gain) arising from:    
-Changes in demographic assumptions 91 2
-Experience adjustment 56 (149)
-Change in financial assumptions 196 53
Refund of overfunding   (18)
Effect of changes in exchange rates 44 (77)
Balance at end of year $ 3,562 $ 3,142