Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue (note 10)	$ 132	$ 8,124	$ 9,434	$ 14,700
Operating expenses:
Research and development	29,431	18,891	70,937	53,576
General and administrative	8,829	4,831	24,309	15,279
Total operating expenses	38,260	23,722	95,246	68,855
Loss from operations	(38,128)	(15,598)	(85,812)	(54,155)
Other income (expense):
Interest income	3,066	57	4,250	275
Unrealized fair value (loss) gain on trading securities	(294)	19	(4,944)	(72)
Foreign exchange (loss) gain	(2,381)	(128)	(2,493)	144
Other income (expense)	391	(52)	(3,187)	347
Loss before income taxes	(37,737)	(15,650)	(88,999)	(53,808)
Income tax recovery	587	205	1,021	490
Net loss	(37,150)	(15,445)	(87,978)	(53,318)
Net loss attributable to preferred shareholders	0	(362)	(420)	(1,308)
Net loss attributable to common shareholders	(37,150)	(15,083)	(87,558)	(52,010)
Other comprehensive loss:
Unrealized losses on available-for-sale securities (note 6)	(1,965)	0	(1,965)	0
Comprehensive loss	$ (39,115)	$ (15,445)	$ (89,943)	$ (53,318)
Net loss per common share (note 4):
Basic	$ (0.57)	$ (0.36)	$ (1.49)	$ (1.29)
Diluted	$ (0.57)	$ (0.36)	$ (1.49)	$ (1.29)
Weighted-average common shares outstanding (note 4):
Basic	65,465,069	42,274,348	58,836,928	40,396,391
Diluted	65,465,069	42,274,348	58,836,928	40,396,391