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Short-term investments
12 Months Ended
Dec. 31, 2021
Cash and Cash Equivalents [Abstract]  
Short-term investments [Text Block]

4. Short-term investments

As at December 31, 2021, short-term investments consisted of investments in mutual funds of $6 million (2020 - $1 million (CAD$1.3 million)) and are with a Canadian financial institution having a high credit rating.