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Basic and diluted net earnings (loss) per share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Options and Convertible Debentures      
Class of Stock [Line Items]      
Anti-dilutive convertible debentures (in shares) 488,621 1,134,711 437,006