Share Capital (Tables)

3 Months Ended

Mar. 31, 2023

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule Of Pre-Funded Warrants Activity

The following table summarizes the pre-funded warrants activity for the three months ended March 31, 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
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

Stock Option Activity

The following table presents stock option activity for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023			2022
Outstanding, beginning of period		7,117,782			5,638,232
Granted		1,866,548			1,659,845
Exercised(1)		(113,677	)		(219,107	)
Forfeited, cancelled or expired		(73,400	)		(3,897	)
Outstanding, end of period		8,797,253			7,075,073
Exercisable, end of period		4,104,317			3,231,657

(1)During the three months ended March 31, 2023, the Company issued 94,319 (2022 – 149,311) common shares for the cashless exercise of 113,677 (2022 – 219,107) 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 March 31,
	2023			2022
Average risk-free interest rate		3.87	%		1.94	%
Expected volatility		69	%		70	%
Average expected term (in years)		6.13			6.28
Expected dividend yield		0	%		0	%
Weighted average fair value of stock options granted	$	22.19		$	19.23