Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities:
Net loss	$ (149,753)	$ (105,855)
Adjustments to reconcile net loss to net cash used in operating activities:
Interest receivable and accretion of discounts on marketable securities	6,505	(1,482)
Depreciation of property plant and equipment	1,291	1,227
Non-cash operating lease expense	649	620
Deferred income tax expense (recovery)	(1,383)	70
Stock-based compensation	25,887	24,116
Unrealized foreign exchange (gain) loss	(28)	118
Realized loss on marketable securities	518	0
Changes in operating assets and liabilities:
Other receivables	380	16
Prepaid expenses and other current assets	(6,412)	285
Accounts payable and accrued liabilities	(2,914)	4,135
Operating lease liability	(625)	(589)
Net cash used in operating activities	(125,885)	(77,339)
Investing activities:
Purchases of property, plant and equipment	(200)	(1,702)
Purchases of marketable securities	(220,055)	(301,826)
Proceeds from marketable securities	337,025	369,527
Net cash provided by investing activities	116,770	65,999
Financing activities:
Proceeds from exercise of stock options	1,216	0
Net cash provided by financing activities	1,216	0
Effect of exchange rate changes on cash and cash equivalents	568	(569)
Decrease in cash and cash equivalents	(7,331)	(11,909)
Cash and cash equivalents, beginning of period	142,712	148,643
Cash and cash equivalents, end of period	135,381	136,734
Supplemental disclosure of cash paid:
Operating lease	845	819
Income taxes	7,897
Supplemental disclosures of non-cash transactions:
Fair value of stock options exercised on a cashless basis	$ 10,324	$ 4,084