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Net Finance Expenses
 12 Months Ended
Dec. 31, 2020
Disclosure Of Net Finance Income Expense Explanatory [Abstract]  
Net Finance Expenses
11.
NET FINANCE EXPENSES
 
 
 
 
 
 
 
 
 
Year ended
 
December 31, 2020
 
 
 
 
 
 
 
 
 
 
 
 
Year ended
 
December 31, 2019
 
 
 
 
 
 
   
Interest income
 
$
 170
 
 $ 521 
   
Accretion expense on decommissioning and restoration liability
 
 
(1,052
) 
  (1,104) 
   
Interest expense
 
 
(34,015
) 
  (33,048) 
   
Amortization of deferred financing costs
 
 
(3,426
) 
  (3,726) 
   
Other finance costs*
 
 
(1,674
) 
  (1,280) 
   
 
 
$
 (39,997
) 
 $ (38,637) 
*Included in other finance costs for the year ended December 31, 2020 is $90 (2019 - $165) related to interest on lease liabilities.