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22. SUPPLEMENTAL FINANCIAL INFORMATION (Details 4) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of defined benefit plans [line items]    
Employee benefit expense $ (7,218) $ (6,856)
Salaries and short-term employee benefits    
Disclosure of defined benefit plans [line items]    
Employee benefit expense (6,229) (6,200)
Share-based compensation    
Disclosure of defined benefit plans [line items]    
Employee benefit expense (969) (341)
Termination benefits    
Disclosure of defined benefit plans [line items]    
Employee benefit expense (20) (46)
Discontinued operations    
Disclosure of defined benefit plans [line items]    
Employee benefit expense $ 0 $ (269)