Financing Activity - Registered Direct Offering (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 01, 2025	Jun. 16, 2025	May 12, 2025	Jul. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 25, 2025	Jun. 10, 2025	May 22, 2025	Feb. 06, 2025	Dec. 31, 2024	Nov. 26, 2024
Financing Activity
Proceeds from Registered Direct Offering							$ 35,010	$ 9,000
Gross proceeds from private placement							85,165
Expenses paid for Registered Direct Offering							$ 492	$ 142
Agreement with Korea Zinc
Financing Activity
Number of shares agreed to sell and issue		19,623,376
Number of warrants issued		6,868,181			6,868,181		6,868,181
Net proceeds from private placement					$ 83,300
Gross proceeds from private placement		$ 85,200			$ 85,200
Share price		$ 4.34
Number of private placement (in Shares)					19,623,376
Payment of stock issuance costs for private placement					$ 1,900
Class B Warrants
Financing Activity
Number of warrants issued							2,500,000
Class C Warrants
Financing Activity
Exercise price of warrants					$ 4.5		$ 4.5
Number of warrants issued									1,003,334	6,666,666	2,333,333
Number of warrants issued					10,003,333
Common Shares
Financing Activity
Number of issuance of shares under Registered Direct Offering (in shares)					9,000,000			4,500,000
Number of private placement (in Shares)					19,623,376		19,623,376
2024 Registered Direct Offering
Financing Activity
Remaining committed fund												$ 5,000
Net proceeds from Registered Direct Offering						$ 5,000
2024 Registered Direct Offering | Class B Warrants
Financing Activity
Number of shares agreed to sell and issue												2,500,000
Net proceeds from Registered Direct Offering						2,800
Exercise price of warrants													$ 2
2024 Registered Direct Offering | Common Shares
Financing Activity
Number of shares agreed to sell and issue												5,000,000		19,900,000
Net proceeds from Registered Direct Offering						$ 2,200
Number of issuance of shares under Registered Direct Offering (in shares)							5,000,000
2024 Registered Direct Offering | Common Shares | Class B Warrants
Financing Activity
Number of shares agreed to sell and issue														9,950,000
2025 Registered Direct Offering
Financing Activity
Gross proceeds from issuance			$ 37,000
Proceeds from Registered Direct Offering					$ 30,000
Number of issuance of shares under Registered Direct Offering (in shares)					9,000,000
Net proceeds from private placement							$ 36,700
Expenses paid for Registered Direct Offering							$ 300
2025 Registered Direct Offering | Subsequent event
Financing Activity
Proceeds from Registered Direct Offering				$ 7,000
Number of issuance of shares under Registered Direct Offering (in shares)				3,333,333
2025 Registered Direct Offering | Class C Warrants
Financing Activity
Exercise price of warrants			$ 3
Number of warrants issued					10,003,333
2025 Registered Direct Offering | Class C Warrants | Subsequent event
Financing Activity
Proceeds from Registered Direct Offering	$ 7,000
Number of warrants issued	2,330,000			2,330,000
2025 Registered Direct Offering | Common Shares
Financing Activity
Number of shares agreed to sell and issue			12,333,333
Number of issuance of shares under Registered Direct Offering (in shares)							9,000,000
2025 Registered Direct Offering | Common Shares | Class C Warrants
Financing Activity
Number of shares agreed to sell and issue			12,333,333