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POST-EMPLOYMENT BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2019
Postemployment Benefits Tables Abstract  
Post-employment benefits
        At December 31   At December 31
(in thousands)       2019   2018
             
Accrued benefit obligation     $ 2,258 $ 2,295
      $ 2,258 $ 2,295
             
Post-employment benefits-by balance sheet presentation:        
Current     $ 150 $ 150
Non-current       2,108   2,145
      $ 2,258 $ 2,295
Post-employment benefits continuity
(in thousands)       2019   2018
             
Balance-January 1     $ 2,295 $ 2,365
Accretion       70   72
Benefits paid       (107)   (142)
Balance-December 31     $ 2,258 $ 2,295