XML 117 R103.htm IDEA: XBRL DOCUMENT v3.19.1
Employee benefits (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance at beginning of year $ 4,460 $ 3,954
Service costs 20 15
Interest expense 76 67
Actuarial loss (gain) arising from:    
-Changes in demographic assumptions 47 46
-Experience adjustment 10 (144)
-Change in financial assumptions (1,217) 175
Effect of changes in exchange rates (212) 347
Balance at end of year $ 3,184 $ 4,460