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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

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:

			2023									2022									2021
			Number of options			Weighted Average Exercise Price $						Number of options			Weighted Average Exercise Price $						Number of options			Weighted Average Exercise Price $
Outstanding, beginning of year			5,963,185			2.91						5,334,420			3.53						3,764,055			4.08
Granted			2,145,400			2.23						1,005,000			2.04						1,832,500			2.99
Forfeited			(280,288)			2.86						(62,962)			3.83						(110,612)			6.21
Expired			(314,573)			4.17						(304,940)			10.80						(28,364)			37.63
Exercised			(450,391)			1.74						(8,333)			1.45						(123,159)			1.94
Outstanding, end of year			7,063,333			2.72						5,963,185			2.91						5,334,420			3.53
Exercisable, end of year			5,039,604			2.85						4,420,482			3.01						3,165,679			3.82

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, 2023:

Range of Exercise Prices						Number Outstanding						Weighted Average Remaining Contractual Life (years)						Weighted Average Exercise Price $						Number Exercisable						Weighted Average Exercise Price $
$1.14 - $2.00						2,015,400						3.7						1.75						1,082,629						1.61
$2.01 - $2.70						1,260,664						2.4						2.25						1,063,990						2.23
$2.71 - $3.11						978,033						4.1						2.78						364,165						2.80
$3.12 - $4.00						2,665,769						1.5						3.32						2,385,353						3.30
$4.01 - $16.53						143,467						0.5						9.20						143,467						9.20
						7,063,333						2.6						2.72						5,039,604						2.85

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, 2023:

Range of Exercise Prices						Number Outstanding						Weighted Average Remaining Contractual Life (years)						Weighted Average Exercise Price $						Number Exercisable						Weighted Average Exercise Price $
$1.14 - $2.00						2,015,400						3.7						1.75						1,082,629						1.61
$2.01 - $2.70						1,260,664						2.4						2.25						1,063,990						2.23
$2.71 - $3.11						978,033						4.1						2.78						364,165						2.80
$3.12 - $4.00						2,665,769						1.5						3.32						2,385,353						3.30
$4.01 - $16.53						143,467						0.5						9.20						143,467						9.20
						7,063,333						2.6						2.72						5,039,604						2.85

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:

			2023						2022						2021
Risk-free interest rate			4.1%						3.4%						0.7%
Expected life			3.0 years						3.0 years						3.0 years
Expected volatility			72.0%						96.0%						110.5%
Expected dividend yield			Nil						Nil						Nil
Weighted average fair value of options			$1.12						$1.24						$1.99

Schedule of number of other equity instruments

Our share award activity for the years ended December 31 was as follows:

			2023						2022						2021
Outstanding, beginning of year			—						40,560						134,618
Granted			403,200						—						—
Forfeited			(4,760)						—						—
Released			—						(40,560)						(94,058)
Outstanding, end of year			398,440						—						40,560

(1) The weighted average fair value of the RSAs granted was $2.23in 2023.

Schedule of compensation warrants weighted average assumptions

We used the following weighted average assumptions:

Underlying share price			US$2.28
Risk-free interest rate			3.8%
Expected life			5.0 years
Expected volatility			36.5%
Expected dividend yield			Nil
Weighted average fair value of options			US$0.88

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