Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue (note 9)		$ 8,766
Operating expenses:
Research and development	$ 39,516	19,360
General and administrative	9,535	6,775
Total operating expenses	49,051	26,135
Loss from operations	(49,051)	(17,369)
Other income (expense):
Interest income	5,423	368
Unrealized fair value gain (loss) on trading securities	1,878	(3,362)
Foreign exchange gain	313	299
Other income (expense)	7,614	(2,695)
Loss before income taxes	(41,437)	(20,064)
Income tax (expense) recovery	(290)	394
Net loss	(41,727)	(19,670)
Net loss attributable to preferred shareholders		(299)
Net loss attributable to common shareholders	(41,727)	(19,371)
Other comprehensive loss:
Unrealized gain on available-for-sale securities (note 5)	1,180	0
Comprehensive loss	$ (40,547)	$ (19,670)
Net loss per common share (note 3):
Basic	$ (0.63)	$ (0.35)
Diluted	$ (0.63)	$ (0.35)
Weighted-average common shares outstanding (note 3):
Basic	65,724,681	54,852,792
Diluted	65,724,681	54,852,792