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General & Administrative Expenses, Compensation of directors and executives (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
General & Administrative Expenses [Abstract]      
Cash compensation $ 3,518 $ 3,989 [1] $ 4,171
Pension cost 36 202 155
Share compensation [2] 2,003 2,250 4,107
Total remuneration $ 5,556 $ 6,441 $ 8,433
[1] Compensation for 2018 includes full year compensation for both current and former chief financial officer.
[2] Share compensation reflects the expense recognized.