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Supplemental Information (Tables)
12 Months Ended
Dec. 31, 2020
Additional information [abstract]  
Changes in non-cash working capital items
Years Ended December 31
2020 2019 
Trade and other receivables$66,285 $(62,198)
Trade and other payables(51,499)(50,660)
$14,786 $(112,858)
Changes in non-cash working capital related to:
Operating activities$48,758 $(52,070)
Investing activities(32,031)(62,485)
Foreign currency translation on non-cash working capital(1,941)1,697 
$14,786 $(112,858)
Employee compensation costs
The following table details the amount of total employee compensation costs included in the operating expense and general and administrative expense.
Years Ended December 31
2020 2019 
Operating$9,065 $12,918 
General and administrative22,802 33,728 
Total employee compensation costs$31,867 $46,646