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Intangible assets - Additional information (Details)
12 Months Ended
Aug. 16, 2019
CAD ($)
Dec. 31, 2021
USD ($)
Sonalleve MR-HIFU    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Terminal growth assumption   4.00%
Discount rate   16.00%
Amount by which unit's recoverable amount exceeds its carrying amount   $ 3,464,000
Impairment loss   $ 0
Exclusive license agreement | Sunnybrook Health Sciences    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Milestone payment $ 250,000