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Share-based payment arrangements - Summary of movements in number of share options outstanding and weighted average exercise prices (Details) | 12 Months Ended
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Dec. 31, 2023 shares $ / shares | Dec. 31, 2022 shares $ / shares
Weighted average price CDN$ |  |
Beginning balance (in dollars per share) | $ / shares | $ 11.31 | $ 11.31
Granted (in dollars per share) | $ / shares | 14.74 | 13.92
Exercised (in dollars per share) | $ / shares | 10.11 | 6.42
Expired (in dollars per share) | $ / shares | 12.76 | 21.98
Forfeited (in dollars per share) | $ / shares | 14.06 | 13.67
Ending balance (in dollars per share) | $ / shares | $ 12.42 | $ 11.31
Number of options |  |
Beginning balance (in shares) | shares | 3,739,567 | 4,250,763
Granted (in shares) | shares | 1,054,431 | 1,265,672
Exercised (in shares) | shares | (987,649) | (885,750)
Expired (in shares) | shares | (127,132) | (667,980)
Forfeited (in shares) | shares | (326,474) | (223,138)
Ending balance (in shares) | shares | 3,352,743 | 3,739,567

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