Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating expenses:
Research and development	$ 44,250	$ 39,516
General and administrative	14,791	9,535
Total operating expenses	59,041	49,051
Loss from operations	(59,041)	(49,051)
Other income:
Interest income	11,355	5,423
Unrealized fair value gain on trading securities		1,878
Foreign exchange gain	167	313
Other income	11,522	7,614
Loss before income taxes	(47,519)	(41,437)
Income tax expense	(412)	(290)
Net loss	(47,931)	(41,727)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities (note 6)	(1,692)	1,180
Comprehensive loss	$ (49,623)	$ (40,547)
Net loss per common share (note 4):
Basic	$ (0.62)	$ (0.63)
Diluted	$ (0.62)	$ (0.63)
Weighted-average common shares outstanding (note 4):
Basic	77,594,599	65,724,681
Diluted	77,594,599	65,724,681