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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2024
Disclosure of share-based payment arrangement [Abstract]  
Schedule of stock options and weighted average exercise prices of share options Our stock option activity for the years ended December 31 was as follows:
202420232022
Number of optionsWeighted Average Exercise Price
$		Number of optionsWeighted Average Exercise Price
$		Number of optionsWeighted Average Exercise Price
$
Outstanding, beginning of year7,063,333 2.725,963,185 2.915,334,420 3.53
Granted 2,016,800 1.222,145,400 2.231,005,000 2.04
Forfeited (175,534)2.46(280,288)2.86(62,962)3.83
Expired(2,028,254)3.22(314,573)4.17(304,940)10.80
Exercised— —(450,391)1.74(8,333)1.45
Outstanding, end of year6,876,345 2.147,063,333 2.725,963,185 2.91
Exercisable, end of year4,718,058 2.435,039,604 2.854,420,482 3.01
Schedule of stock options outstanding and exercisable by range of exercise price
The following table summarizes information about the stock options outstanding and exercisable at December 31, 2024:
Range of Exercise PricesNumber OutstandingWeighted Average Remaining Contractual Life (years)Weighted Average Exercise Price
$		Number ExercisableWeighted Average Exercise Price
$
$1.13 - $1.50
1,799,300 4.61.14637,257 1.13
$1.51 - $2.20
2,232,850 3.31.881,434,792 1.94
$2.21 - $2.70
699,689 1.92.36699,689 2.36
$2.71 - $3.11
940,800 3.22.78742,614 2.78
$3.12 - $7.60
1,203,706 1.23.511,203,706 3.51
6,876,345 3.12.144,718,058 2.43
Schedule of weighted average remaining contractual life and outstanding stock options by exercise price
The following table summarizes information about the stock options outstanding and exercisable at December 31, 2024:
Range of Exercise PricesNumber OutstandingWeighted Average Remaining Contractual Life (years)Weighted Average Exercise Price
$		Number ExercisableWeighted Average Exercise Price
$
$1.13 - $1.50
1,799,300 4.61.14637,257 1.13
$1.51 - $2.20
2,232,850 3.31.881,434,792 1.94
$2.21 - $2.70
699,689 1.92.36699,689 2.36
$2.71 - $3.11
940,800 3.22.78742,614 2.78
$3.12 - $7.60
1,203,706 1.23.511,203,706 3.51
6,876,345 3.12.144,718,058 2.43
Disclosure weighted average assumptions and fair value of options
The estimated fair value of stock options granted during the years ended December 31 were determined using the following weighted average assumptions:
202420232022
Risk-free interest rate3.1%4.1%3.4%
Expected life3.0 years3.0 years3.0 years
Expected volatility66.4%72.0%96.0%
Expected dividend yieldNilNilNil
Weighted average fair value of options$0.57$1.12$1.24
Schedule of number of other equity instruments Our share award activity for the years ended December 31 was as follows:
202420232022
Outstanding, beginning of year398,440 — 40,560 
Granted(1)
853,642 403,200 — 
Forfeited — (4,760)— 
Released(133,572)— (40,560)
Outstanding, end of year1,118,510 398,440 — 
(1) The weighted average fair value of the RSAs granted was $1.15 in 2024 (2023 - $2.23).