Consolidated Balance Sheets - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 71,492		$ 71,492		$ 38,603
Marketable securities (Notes 4 and 16)	126,411		126,411		80,854
Trade and other receivables, no allowance for credit losses, as of June 30, 2025 and December 31, 2024 (Note 5)	7,791		7,791		37,763
Inventories (Note 6)	76,496		76,496		66,504
Prepaid expenses and other current assets	6,710		6,710		6,463
Total current assets	288,900		288,900		230,187
Mineral properties, net (Note 7)	293,832		293,832		278,330
Property, plant and equipment, net (Note 7)	57,259		57,259		55,187
Investments (Note 8)	22,020		22,020		15,890
Marketable securities (Notes 4 and 16)	7,993		7,993		0
Intellectual property, net (Note 3)	4,534		4,534		4,767
Restricted cash (Note 9)	20,352		20,352		20,002
Other assets	7,584		7,584		7,606
Total assets	702,474		702,474		611,969
Current liabilities
Accounts payable and accrued liabilities (Note 14)	22,159		22,159		32,228
Asset retirement obligations (Note 9)	11,007		11,007		24,604
Contingent consideration (Notes 3 and 16)	1,709	$ 1,764	1,709	$ 1,764
Other liabilities	796		796		693
Total current liabilities	35,671		35,671		59,289
Asset retirement obligations (Note 9)	20,858		20,858		19,513
Other liabilities	1,176		1,176		1,490
Total liabilities	57,705		57,705		80,292
Equity
Share capital Common shares, without par value, unlimited shares authorized; shares issued and outstanding 229,424,632 and 198,666,994 as of June 30, 2025 and December 31, 2024, respectively	1,095,295		1,095,295		937,889
Accumulated deficit	(452,132)		(452,132)		(404,023)
Accumulated other comprehensive loss	(2,981)		(2,981)		(6,072)
Total shareholders' equity	640,182		640,182		527,794
Non-controlling interest	4,587		4,587		3,883
Total equity	644,769	382,736	644,769	382,736	531,677
Total liabilities and equity	702,474		702,474		611,969
Commitments and contingencies (Note 15)
Depreciation	$ 1,250	$ 620	$ 2,430	$ 1,290