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Share-based payments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Share-based payments |
Summary of the share option changes during the period presented and the total number of share options outstanding | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | average
​ | ​ | ​ | ​ | exercise
​ | ​ | Number | ​ | price
​ |  | of options |  | C$
​ | ​ | ​ | ​ | ​
Balance – January 1, 2022 |  | 2,092,596 |  | 16.90
Granted |  | 29,200 |  | 9.65
Exercised |  | (40,542) |  | 8.45
Forfeited/expired |  | (569,481) |  | 17.49
Balance – December 31, 2022 |  | 1,511,773 |  | 16.07
Granted |  | 59,300 |  | 15.42
Exercised |  | (33,799) |  | 9.86
Forfeited/expired |  | (62,465) |  | 16.13
Balance – December 31, 2023 |  | 1,474,809 |  | 16.19
Summary of estimated the fair value of the share options granted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 22, | ​ | June 12, | ​ | September 8, | ​ | November 16, | ​
​ |  | 2023 |  | 2023 |  | 2023 |  | 2023 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercise price | ​ | C$ | 13.39 | ​ | C$ | 19.87 | ​ | C$ | 12.38 | ​ | C$ | 12.41 | ​
Expected volatility | ​ | ​ | 70 | % |  | 70 | % |  | 69 | % |  | 70 | %
Expected life of options | ​ | ​ | 6 | years |  | 6 | years |  | 6 | years |  | 6 | years
Risk-free interest rate | ​ | ​ | 3.38 | % |  | 3.22 | % |  | 3.71 | % |  | 4.16 | %
Dividend yield | ​ | ​ | — | ​ |  | — | ​ |  | — | ​ |  | — | ​
Number of share options issued | ​ | ​ | 13,900 | ​ |  | 23,450 | ​ |  | 7,650 | ​ |  | 14,300 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | August 15, | ​ | December 20, |
​ |  | 2022 |  | 2022 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercise price | ​ | C$ | 9.20 | ​ | C$ | 12.46 | ​
Expected volatility | ​ |  | 68 | % |  | 71 | %
Expected life of options | ​ |  | 6 | years |  | 6 | years
Risk-free interest rate | ​ |  | 2.76 | % |  | 2.95 | %
Dividend yield | ​ |  | — | ​ |  | — | ​
Number of share options issued | ​ |  | 25,200 | ​ |  | 4,000 | ​
​
Summary of the share options outstanding | The following table summarizes information about the share options outstanding as at December 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | ​
​ | ​ | ​ | ​ | average | ​ | ​
​ | ​ | Number of | ​ | remaining | ​ | Number of
Exercise price | ​ | options | ​ | contractual | ​ | options
C$ |  | outstanding |  | life (years) |  | exercisable
​ | ​ | ​ | ​ | ​ | ​ | ​
8.01 – 10.00 |  | 317,609 |  | 5.30 |  | 314,535
10.01 – 12.00 |  | 109,534 |  | 4.23 |  | 109,534
12.01 – 14.00 |  | 37,650 |  | 8.02 |  | 9,050
14.01 – 16.00 |  | 142,456 |  | 3.43 |  | 133,759
16.01 – 18.00 |  | 421,889 |  | 6.40 |  | 376,252
18.01 – 20.00 | ​ | 21,700 | ​ | 9.45 | ​ | —
20.01 – 22.00 |  | 300 |  | 6.63 |  | 248
22.01 – 24.00 |  | 411,871 |  | 7.38 |  | 266,951
24.01 – 26.00 | ​ | 1,800 | ​ | 6.90 | ​ | 1,373
28.01 – 30.00 | ​ | 10,000 | ​ | 7.20 | ​ | 6,879
​ | ​ | 1,474,809 | ​ | 6.08 | ​ | 1,218,581
Summary of the RSUs changes during the period | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | average
​ | ​ | ​ | ​ | remaining
​ |  | Number of |  | contractual
​ | ​ | RSUs | ​ | life (years)
​ | ​ | ​ | ​ | ​
Balance – January 1, 2022 |  | 232,317 | ​ | 2.45
Granted |  | 385,083 | ​ | 3.00
Vested |  | (62,738) | ​ | —
Forfeited | ​ | (110,801) | ​ | 2.14
Balance – December 31, 2022 | ​ | 443,861 | ​ | 2.38
Granted | ​ | 235,500 | ​ | 3.00
Vested | ​ | (162,131) | ​ | —
Forfeited | ​ | (23,834) | ​ | 1.56
Balance – December 31, 2023 |  | 493,396 | ​ | 1.99
​
​ | ​ | ​
​ | ​ | Number of
​ |  | DSUs
​ | ​ | ​
Balance - January 1, 2022 | ​ | —
Granted | ​ | 60,000
Balance - December 31, 2022 | ​ | 60,000
Granted | ​ | 25,000
Vested | ​ | (10,000)
Balance - December 31, 2023 | ​ | 75,000
​

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