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Other Liabilities (Schedule of Other Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Other Liabilities [abstract]    
Restricted share units (note 20) $ 1,437 $ 2,264
Other non-current liabilities 1,873 259
Other liabilities $ 3,310 $ 2,523