Share Capital (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule Of Pre-Funded Warrants Activity

The following table summarizes the pre-funded warrants activity for the three and six months ended June 30, 2023 and 2022:

	Date of issuance
	March 2021			October 2021		June 2022		Total
Outstanding, December 31, 2021		1,081,081			1,694,915		—		2,775,996
Exercised		—			—		—		—
Outstanding, March 31, 2022		1,081,081			1,694,915		—		2,775,996
Issued		—			—		327,868		327,868
Exercised		—			—		—		—
Outstanding, June 30, 2022		1,081,081			1,694,915		327,868		3,103,864
Outstanding, December 31, 2022		1,081,081			1,694,915		327,868		3,103,864
Exercised		(425,003	)		—		—		(425,003	)
Outstanding, March 31, 2023		656,078			1,694,915		327,868		2,678,861
Exercised		(425,003	)		—		—		(425,003	)
Outstanding, June 30, 2023		231,075			1,694,915		327,868		2,253,858

Stock Option Activity

The following table presents stock option activity for the three and six months ended June 30, 2023 and 2022:

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
Outstanding, beginning of period		8,797,253			7,075,073			7,117,782			5,638,232
Granted		227,425			318,000			2,093,973			1,977,845
Exercised(1)		(278,069	)		(130,031	)		(391,746	)		(349,138	)
Forfeited, cancelled or expired		(64,801	)		(28,582	)		(138,201	)		(32,479	)
Outstanding, end of period		8,681,808			7,234,460			8,681,808			7,234,460
Exercisable, end of period		4,316,058			3,464,081			4,316,058			3,464,081

(1)During the six months ended June 30, 2023, the Company issued 280,649 (2022 – 234,783) common shares for the cashless exercise of 391,746 (2022 – 349,138) stock options.

Fair Value Assumptions for Stock Options

The fair value of each stock option granted is estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions:

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
Average risk-free interest rate		3.69	%		3.17	%		3.85	%		2.14	%
Expected volatility		69	%		70	%		69	%		70	%
Average expected term (in years)		6.14			5.87			6.13			6.21
Expected dividend yield		0	%		0	%		0	%		0	%
Weighted average fair value of stock options granted	$	25.42		$	19.60		$	22.54		$	19.29