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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]  
Supplemental cash flow information
Year ended
December 31, 2020December 31, 2019
Changes in other assets and liabilities
Amounts receivable(1,102)— 
Other assets(340)(300)
Accounts payable and accrued liabilities1,049 317 
(393)17