CONDENSED CONSOLIDATED INTERIM BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Common stock, par value | $ 0 | $ 0 | ||
| Common stock, unlimited authorized | Unlimited | Unlimited | ||
| Common stock, shares issued | 347,370 | 314,335 | ||
| Common stock, shares outstanding | 347,370 | 314,335 | ||
| Assets | $ 3,112,729 | $ 2,579,048 | ||
| Cash | 758,512 | 568,226 | ||
| Restricted Cash | 449,100 | 337,400 | ||
| Receivables | 3,125 | 4,110 | ||
| Prepaids and deposits | 1,652 | 1,920 | ||
| Mineral properties, plant and equipment | 1,667,297 | 1,344,004 | ||
| Deferred financing costs | 224,398 | 311,808 | ||
| Other assets, non-current | 8,376 | 6,734 | ||
| Liabilities | 1,235,849 | 992,399 | ||
| Accounts payable | 70,110 | 87,848 | ||
| Accrued liabilities | 88,825 | 83,441 | ||
| Lease liabilities, current | 5,787 | 5,530 | ||
| Warrant obligation (Note 4) | 144,888 | 234,091 | ||
| Lease liabilities, non-current | 16,803 | 15,668 | ||
| Reclamation liabilities | 473 | 473 | ||
| DOE Loan | [1] | 702,868 | 350,987 | |
| Other liabilities, non-current | 3,500 | 3,500 | ||
| Variable Interest Entities (VIEs) [Member] | ||||
| Assets | 2,400,000 | 2,100,000 | ||
| Cash | 80,100 | 75,500 | ||
| Restricted Cash | 448,800 | 337,100 | ||
| Receivables | 900 | 2,500 | ||
| Prepaids and deposits | 200 | 400 | ||
| Mineral properties, plant and equipment | 1,600,000 | 1,300,000 | ||
| Deferred financing costs | 224,100 | 311,800 | ||
| Other assets, non-current | 8,300 | 6,600 | ||
| Liabilities | 1,000,000 | 670,100 | ||
| Accounts payable | 70,100 | 87,400 | ||
| Accrued liabilities | 84,900 | 74,500 | ||
| Lease liabilities, current | 5,700 | 5,400 | ||
| Lease liabilities, non-current | 16,800 | 15,700 | ||
| Reclamation liabilities | 500 | 500 | ||
| DOE Loan | 702,900 | 351,000 | ||
| Other liabilities, non-current | 3,500 | 3,500 | ||
| JV Warrants [Member] | ||||
| Warrant obligation (Note 4) | 144,888 | 150,295 | ||
| JV Warrants [Member] | Variable Interest Entities (VIEs) [Member] | ||||
| Warrant obligation (Note 4) | 84,200 | 101,900 | ||
| Nonrecourse [Member] | Variable Interest Entities (VIEs) [Member] | ||||
| Liabilities | $ 968,500 | $ 639,800 | ||
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CONDENSED CONSOLIDATED INTERIM STATEMENTS OF INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Operating expenses | ||
| Exploration expenditures | $ 0 | $ (19) |
| General and administrative expenses (Note 11) | (11,097) | (6,517) |
| Total operating expenses | (11,097) | (6,536) |
| Other income (expense) | ||
| Transaction costs (Note 12) | (1,001) | (4,302) |
| Gain on LAC Warrant and JV Warrant obligations (Note 4) | 417 | 0 |
| Gain on convertible debt and conversion feature (Note 8) | 14,304 | 0 |
| Loss on investments measured at fair value | (4,607) | (1,956) |
| Other income | 6,612 | 1,268 |
| Total other income (expense) | 15,725 | (4,990) |
| Net income (loss) | 4,628 | (11,526) |
| Net income (loss) attributable to: | ||
| Common stockholders | (409) | (10,702) |
| Non-controlling interest | $ 5,037 | $ (824) |
| Net loss per share attributable to common stockholders, basic and diluted (Note 10) | $ (0) | $ (0.05) |
| Net income (loss) per share attributable to common stockholders, diluted (Note 10) | $ (0) | $ (0.05) |
| Weighted average number of common shares outstanding, basic | 353,176 | 218,603 |
| Weighted average number of common shares outstanding, diluted | 353,176 | 218,603 |
CONDENSED CONSOLIDATED INTERIM STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Thousands |
Total |
Common Stock [Member] |
Additional Paid-in Capital [Member] |
Accumulated Deficit [Member] |
Total equity attributable to LAC shareholders [Member] |
Noncontrolling Interest [Member] |
|---|---|---|---|---|---|---|
| Beginning Balance, shares at Dec. 31, 2024 | 218,465 | |||||
| Beginning Balance at Dec. 31, 2024 | $ 945,340 | $ 655,068 | $ 35,618 | $ (55,682) | $ 635,004 | $ 310,336 |
| Shares issued on conversion of stock-based awards, shares | 221 | |||||
| Shares issued on conversion of stock-based awards | $ 2,256 | (2,256) | ||||
| Stock-based compensation | 1,198 | 1,198 | 1,198 | |||
| Net Income (Loss) | (11,526) | (10,702) | (10,702) | (824) | ||
| Ending Balance, shares at Mar. 31, 2025 | 218,686 | |||||
| Ending Balance at Mar. 31, 2025 | 935,012 | $ 657,324 | 34,560 | (66,384) | 625,500 | 309,512 |
| Beginning Balance, shares at Dec. 31, 2024 | 218,465 | |||||
| Beginning Balance at Dec. 31, 2024 | 945,340 | $ 655,068 | 35,618 | (55,682) | 635,004 | 310,336 |
| Ending Balance, shares at Dec. 31, 2025 | 314,335 | |||||
| Ending Balance at Dec. 31, 2025 | 1,586,649 | $ 1,279,902 | 0 | (221,148) | 1,058,754 | 527,895 |
| Shares issued under public offerings, net of issuance costs (Note 9) | 189,684 | $ 189,684 | 189,684 | |||
| Shares issued under public offerings, net of issuance costs (Note 9), shares | 32,468 | |||||
| Shares issued on conversion of stock-based awards, shares | 567 | |||||
| Shares issued on conversion of stock-based awards | $ 7,432 | (7,432) | ||||
| Stock-based compensation | 7,331 | 7,331 | 7,331 | |||
| Issuance of LAC Warrant, net of issuance costs (Note 9) | 88,588 | 88,588 | 88,588 | |||
| Net Income (Loss) | 4,628 | (409) | (409) | 5,037 | ||
| Ending Balance, shares at Mar. 31, 2026 | 347,370 | |||||
| Ending Balance at Mar. 31, 2026 | $ 1,876,880 | $ 1,477,018 | $ 88,487 | $ (221,557) | $ 1,343,948 | $ 532,932 |
CONDENSED CONSOLIDATED INTERIM STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Operating activities | ||||
| Net income (loss) | $ 4,628 | $ (11,526) | ||
| Adjustments for: | ||||
| Depreciation | 14 | 12 | ||
| Stock-based compensation | 2,138 | 1,033 | ||
| Amortization of right-of-use asset | 313 | 253 | ||
| Gain on LAC and JV warrant obligations (Note 4) | (417) | 0 | ||
| Gain on convertible debt and conversion feature (Note 8) | (14,304) | 0 | ||
| Loss on financial instruments measured at fair value | 4,607 | 1,956 | ||
| Other items | 0 | 182 | ||
| Increase in receivables | (585) | (68) | ||
| Decrease in prepaids and deposits | 16 | 443 | ||
| Increase/(decrease) in accounts payable | (13,686) | 60 | ||
| Decrease in accrued liabilities | (853) | (10,939) | ||
| Operating lease payments, net of non-cash interest accrual | (123) | (247) | ||
| Net cash used in operating activities | (18,252) | (18,841) | ||
| Investing activities | ||||
| Additions to mineral properties, plant and equipment | (299,323) | (117,933) | ||
| Net cash used in investing activities | (299,323) | (117,933) | ||
| Financing activities | ||||
| Proceeds from public offering, net of issuance costs (Note 9) | 189,640 | 0 | ||
| Proceeds from DOE Loan (Note 4) | 432,000 | 0 | ||
| Payment of financing costs | (832) | (9,294) | ||
| Principal payments on finance lease obligations | (1,217) | (1,197) | ||
| Net cash provided by (used in) financing activities | 619,591 | (10,491) | ||
| Net increase (decrease) in cash and restricted cash | 302,016 | (147,265) | ||
| Cash and restricted cash, beginning of period (Note 2) | [1] | 905,609 | 594,173 | |
| Cash and restricted cash, end of period (Note 2) | [1] | $ 1,207,625 | $ 446,908 | |
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CONDENSED CONSOLIDATED INTERIM STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Statement of Cash Flows [Abstract] | ||
| Restricted cash | $ 449.1 | $ 337.4 |
Pay vs Performance Disclosure - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Pay vs Performance Disclosure | ||
| Net Income (Loss) | $ 4,628 | $ (11,526) |
Insider Trading Arrangements |
3 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Trading Arrangements, by Individual | |
| Rule 10b5-1 Arrangement Adopted | false |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
Background and Basis of Presentation |
3 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Background and Basis of Presentation | 1. BACKGROUND AND BASIS OF PRESENTATION Background and Nature of Operations Lithium Americas Corp., (the “Company” or “LAC”) is principally focused on development of Thacker Pass (“Thacker Pass” or the “Project”), a sedimentary-based lithium project located in the McDermitt Caldera in Humboldt County in north-western Nevada, USA. The Company operates in one operating segment and one geographical area. The development of Thacker Pass is undertaken through a joint venture (the “JV”) with General Motors Holdings LLC (“GM”) (Note 5). The Company’s common shares are listed on the New York Stock Exchange (“NYSE”) and on the Toronto Stock Exchange (“TSX”) under the symbol “LAC.” To date, the Company has not generated revenues from operations and has relied on financing to fund operations. The underlying values of mineral properties, plant and equipment, including Thacker Pass, are dependent on the existence of economically recoverable reserves, maintaining title and beneficial interest in the properties, and the ability of the Company to draw upon debt financing arrangements and/or raise additional capital to complete development and to attain future profitable operations. Basis of Presentation The unaudited condensed consolidated interim financial statements (the “Interim Statements”) of the Company have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, they do not include all the information and notes required by U.S. GAAP for complete financial statements. The Interim Statements include all adjustments considered necessary by management to fairly state the financial position, results of operations and cash flows for the interim periods reported. The operating results for the interim periods presented are not necessarily indicative of results that may be expected for any other interim period or for the full year. These Interim Statements are expressed in U.S. dollars (“USD”), the Company’s presentation and functional currency. These Interim Statements should be read in conjunction with the annual consolidated financial statements and notes thereto and the summary of significant accounting policies included in the Company’s annual report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on March 19, 2026 (the “Fiscal 2025 Annual Financial Statements”). These policies have been applied on a consistent basis for all periods. Information related to recent accounting pronouncements, which are not yet effective, is included in Note 2 to the Fiscal 2025 Annual Financial Statements. These Interim Statements have been prepared on the assumption that the Company is a going concern and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business for the next 12 months. Recently Issued Accounting Pronouncements In December 2025, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2025-11, “Interim Reporting (Topic 270): Narrow-scope improvements” (“ASU 2025-11”). The amendments clarify the scope, form, and content of interim financial statement disclosures and improve the navigability of Topic 270 without changing existing interim reporting requirements. ASU 2025-11 provides a comprehensive list of required interim disclosures and establishes a new disclosure principle requiring entities to disclose events that occur after the end of the last annual reporting period. ASU 2025-11 is effective for interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact the amended guidance will have on its interim financial reporting and related disclosures. |
Cash and Restricted Cash |
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Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||
| Cash and Cash Equivalents [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Cash and Restricted Cash | 2. CASH AND RESTRICTED CASH
As at March 31, 2026, $0.7 million of cash and restricted cash was held in Canadian dollars (December 31, 2025 – $1.4 million), and $1.2 billion in US dollars (December 31, 2025 – $904.2 million). Advances under the DOE Loan (Note 4), cash flows from Thacker Pass, and other amounts received by Lithium Nevada LLC (“LN”) are required to be held in restricted cash accounts owned by LN and managed by a collateral agent as described in Note 3 to the Fiscal 2025 Annual Financial Statements. As at March 31, 2026, such amounts totaled $448.8 million (December 31, 2025 - $337.1 million). The Company is subject to a concentration of credit risk in relation to cash and restricted cash. The Company’s maximum exposure to credit risk for cash and restricted cash is the amount disclosed in the Company’s Condensed Consolidated Interim Balance Sheets. All cash and restricted cash is held through two Canadian chartered banks and two U.S. chartered banks. The Company regularly reviews its cash and restricted cash, as well as economic conditions, to determine whether an allowance for expected losses is necessary. |
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Mineral Properties, Plant and Equipment, Net |
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Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mineral Properties, Plant and Equipment, Net | 3. MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET
1 At March 31, 2026, included prepaid construction costs of $92.4 million (December 31, 2025 - $75.0 million) and deposits on long-lead equipment of $296.8 million (December 31, 2025 - $268.7 million), all related to Thacker Pass. In addition, amount included capitalized amounts for deferred interest on the Notes of $15.7 million (December 31, 2025 - $13.0 million), discount amortization of $12.3 million on the Notes and PPA (December 31, 2025 - $9.1 million), deferred interest on the DOE Loan of $8.1 million (December 31, 2025 - $2.3 million), and $3.3 million of interest on other loans (December 31, 2025 - $3.2 million). During the three months ended March 31, 2026 and 2025, respectively, stock-based compensation related to restricted share units of $0.7 million and $0.3 million was capitalized to Thacker Pass. |
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Department of Energy Loan Facility and Warrant Obligations |
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Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Department of Energy Loan Facility and Warrant Obligations | 4. DEPARTMENT OF ENERGY LOAN FACILITY AND WARRANT OBLIGATIONS The Department of Energy (the “DOE”) and the Company’s subsidiary, LN, executed a loan agreement on October 28, 2024 for a construction facility with a maximum borrowing of $1.97 billion plus up to $289.6 million of capitalized interest for a total of $2.26 billion, provided under the Advanced Technology Vehicles Manufacturing (“ATVM”) Loan Program (the “DOE Loan”), to fund eligible construction costs of Thacker Pass, over the period from the first advance through no later than November 30, 2028. The DOE Loan agreement was amended on December 20, 2024 to accommodate the formation of Lithium Nevada Ventures LLC (“Lithium Nevada Ventures”), a joint venture with GM (Note 5) to own a 100% interest in LN, which owns Thacker Pass. On October 7, 2025, the Company and the DOE entered into an omnibus waiver, consent and amendment (as amended the “OWCA”) for certain amendments to the Company’s DOE Loan. As part of the OWCA, the DOE Loan’s expected total loan amount decreased to $2.23 billion due to estimated capitalized interest during construction decreasing to $256 million, while the DOE Loan’s principal remained the same at $1.97 billion. On January 30, 2026 (the “Issuance Date”), as required under the OWCA: • The Company issued to the DOE a warrant to purchase up to 18,268,687 common shares, which was equal to 5% of the Company’s outstanding total shares as of the Issuance Date, at an exercise price of $0.01 per share (the “LAC Warrant”), exercisable for ten years from the Issuance Date, subject to customary anti-dilution adjustments and other terms set forth in the LAC Warrant. • The JV issued to the DOE a warrant to purchase 8,656,509,695 non-voting units of the JV, which was equal to a 5% economic interest in the JV as of the Issuance Date, at an exercise price of $0.0001 per unit (the “JV Warrant”), exercisable for ten years from the Issuance Date, subject to customary anti-dilution adjustments and other terms set forth in the JV Warrant. • The JV, the Company, 1339480 B.C. Ltd., LAC US Corp. (the “LAC JV Member”), GM and the DOE, entered into a Put, Call and Exchange Agreement (the “Put, Call and Exchange Agreement”), under which the DOE has the right to require GM to either purchase the JV Warrant (or cause the JV to do so) at a mutually agreed price or, failing agreement, exchange the JV Warrant for the Company’s common shares based on a defined warrant conversion rate. In addition, following substantial completion of Thacker Pass, GM has a call right to trigger the same sale or exchange mechanics if pricing cannot be agreed within specified timeframes. Borrowings under the DOE ATVM Loan Program The following table represents a reconciliation from the initial recognition of advances under the DOE Loan to March 31, 2026.
1 First advance in the amount of $435.0 million bearing fixed contractual interest of 4.38%, with repayment beginning in January 2029. 2 Second advance in the amount of $432.0 million bearing fixed contractual interest of 4.41%, with repayment beginning in January 2029. Deferred financing costs of $400.2 million were recognized with the signing of the OWCA and were initially recorded as an asset on the Consolidated Balance Sheets. The deferred costs included $394.1 million relating to the fair value at inception of the LAC Warrant and the JV Warrant and $6.1 million of costs paid to obtain the debt facility. The deferred financing costs are reclassified against the DOE Loan liability in proportion to the amounts borrowed in relation to total borrowings expected under the facility. These costs are amortized as interest costs over the term of the borrowing using the effective interest rate method and are capitalized to Thacker Pass. The effective interest rate after giving effect to the amortization of the portion of deferred financing costs was approximately 6.36% on the first advance and 6.45% on the second advance. The DOE Loan contains a variety of financial and non-financial compliance covenants. In the event of noncompliance with certain covenants, the DOE has the right to terminate the facility and demand any outstanding amounts immediately due and payable. The Company was in compliance with all covenants at March 31, 2026 and December 31, 2025. Warrant obligations On October 7, 2025, in accordance with obligations under the OWCA, the Company recorded financial liabilities related to the LAC Warrant, the JV Warrant and the Put, Call and Exchange Agreement. The following table represents a reconciliation from the initial recognition of the obligations pursuant to the LAC Warrant and the JV Warrant to the fair value of the warrant obligations at March 31, 2026.
Obligations pursuant to the LAC Warrant At October 7, 2025 and December 31, 2025, the obligation relating to the LAC Warrant was recorded as a financial liability, as the obligation was with respect to 5% of the Company’s total outstanding shares to be determined at a future date and, accordingly, was not considered indexed solely to the Company’s equity. The Company accounted for the LAC Warrant based on the contractual terms and agreement in principle between parties upon the execution of the OWCA on October 7, 2025. These terms were consistent with those included in the LAC Warrant subsequently executed on January 30, 2026. On January 30, 2026, as the number of common shares of the Company to be issued under the LAC Warrant was fixed, the fair value of the LAC Warrant obligation was remeasured and the resulting amount of $88.6 million (representing fair value of $88.8 million less $0.2 million of issuance costs) was reclassified to additional paid-in capital. Obligations pursuant to the JV Warrant and the Put, Call and Exchange Agreement At October 7, 2025, December 31, 2025 and March 31, 2026, the obligation related to the JV Warrant was recorded as a financial liability, as the obligation was with respect to 5% of the JV’s total units, as if the JV Warrant had been exercised for the underlying units to be determined at a future date and, accordingly, was not considered indexed solely to the Company’s equity. The Company accounted for the JV Warrant based on the contractual terms and agreement in principle between parties including the put, call and conversion features therein, upon the execution of the OWCA on October 7, 2025. These terms were consistent with those included in the JV Warrant subsequently executed on January 30, 2026. The contingent obligations of the Company and the JV arising from the Put, Call and Exchange Agreement are considered embedded in the JV Warrant. The JV’s embedded written option to settle the JV Warrant in cash is included in the fair value of the JV Warrant on the JV’s Condensed Consolidated Interim Balance Sheets, whereas the Company’s embedded written option to purchase the JV Warrant from the DOE is included in the fair value of the JV Warrant in the Company’s Condensed Consolidated Interim Balance Sheets. |
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Accrued Liabilities |
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| Accrued Liabilities, Current [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Liabilities | 6. ACCRUED LIABILITIES Accrued liabilities are comprised of the following items:
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Lease Liabilities |
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| Lease Liabilities | 7. LEASE LIABILITIES Lease liabilities include the following:
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Joint Venture With General Motors |
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| Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Joint Venture With General Motors | 5. JOINT VENTURE WITH GENERAL MOTORS On October 15, 2024, the Company and GM entered into an investment agreement (“GM Investment Agreement”) to establish a joint venture for the purpose of funding, developing, constructing and operating Thacker Pass as described in Note 4 to the Fiscal 2025 Annual Financial Statements. As of the closing of the JV in December 2024, and as at March 31, 2026, the Company owned a 62% majority equity interest in the JV and operates the JV through its majority voting rights and a management services agreement under which the Company provides executive level, administrative and other services to the JV. As at March 31, 2026, GM owned a 38% interest in the JV and the DOE owned the JV Warrant. As described in Note 4 to the Fiscal 2025 Annual Financial Statements, on August 5, 2025, the $195.0 million Letter of Credit was released by GM to the Company, and on October 7, 2025, the Company and GM entered into an amendment to GM’s Phase 1 lithium offtake agreement. The Company has determined that the JV is a variable interest entity due to its reliance on additional financing to complete Phase 1 of the development of Thacker Pass. The Company has determined it is the primary beneficiary of the JV due to the relative decision-making power of the parties over the most significant activities of the JV. As a result, the Company has consolidated Lithium Nevada Ventures, the JV, in these Interim Statements. The net assets, respective interests and non-controlling interest of Lithium Nevada Ventures as of March 31, 2026 and December 31, 2025, are as follows:
1 The Company allocates income and net assets between the controlling and non-controlling interests based on a hypothetical liquidation at book value. The assets of the JV, including cash and restricted cash of $528.9 million and $412.6 million at March 31, 2026 and December 31, 2025, respectively, can only be used to settle the obligations of the JV and are not available to the Company for general corporate purposes. The Company’s maximum exposure to loss includes (i) the carrying value of the Company’s interest as shown in the table above; (ii) as the DOE Loan is funded, (a) all costs necessary to achieve completion of construction of Thacker Pass; and, (b) all outstanding borrowings and interest thereon under the DOE loan; and (iii) costs associated with the management services agreement and incentive compensation for personnel involved in the JV, to the extent such amounts cannot be supported by the operations of the JV ($13.0 million at March 31, 2026 and $9.2 million at December 31, 2025). |
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Convertible Debt, Royalty and Production Payment Arrangements |
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| Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Convertible Debt, Royalty and Production Payment Arrangements | 8. CONVERTIBLE DEBT, ROYALTY AND PRODUCTION PAYMENT ARRANGEMENTS On April 1, 2025 (the “Orion Closing Date”), the Company closed the strategic investment of $250.0 million from fund entities managed by Orion, for the development and construction of Phase 1 of Thacker Pass (the “Orion Investment”). At closing, Orion purchased senior unsecured convertible notes with an aggregate principal amount of $195.0 million (the “Notes”) and entered into a Production Payment Agreement (“PPA”) whereby Orion paid the Company $25.0 million in exchange for payments corresponding to the minerals processed and gross revenue generated by Thacker Pass. Under the PPA, Orion is entitled to fixed and variable production payments with respect to the first 41,500 tonnes of lithium processed at Thacker Pass each year, subject to certain adjustments. The Notes will mature on April 1, 2030 and accrue interest payable quarterly in arrears at an annual rate of 9.875%. Interest is payable in cash or by inclusion of such interest in the principal amount at the option of the Company. The Notes are convertible at the option of the holder at any time into the Company’s common shares prior to the maturity at an initial conversion price of $3.78 per share, subject to certain adjustments. In October 2025, Orion elected to convert a total of $97.5 million in accordance with the terms of the Notes. As a result, the Company issued an aggregate total of 25.8 million common shares of the Company to Orion. Following the conversions, total future interest payable under the Notes has been reduced pro rata. Orion has committed to purchase an additional $30.0 million in aggregate principal amount of Notes within two years of the Orion Closing Date (the “Delayed Draw Notes”), subject to the satisfaction of certain conditions precedent, upon request by the Company. As of March 31, 2026, the Company had not issued the Delayed Draw Notes. In addition, the Company is obligated under a separate 2013 royalty agreement to pay an 8% gross revenue royalty for sales on production from all Thacker Pass mineral claims up to a cumulative payment of $22.0 million, after which the royalty rate is reduced to 4% for the remaining life of the project. The Company has the option at any time to reduce the royalty to 1.75% through payment of $22.0 million. The portion of the royalty subject to repurchase has been recorded as a financial liability carried at amortized cost. The Company is also obligated to pay a 20% royalty on revenue solely in respect of uranium sales, if any. Convertible Debt The following reconciliation includes initial recognition of the components of the Orion Investment and activity to March 31, 2026:
The effective interest rate was 26.7% and 27.3% for the Notes and PPA, respectively, for the three months ended March 31, 2026. Production Payment Agreement and Royalty
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Stockholders' Equity |
3 Months Ended |
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Mar. 31, 2026 | |
| Equity [Abstract] | |
| Stockholders' Equity | 9. STOCKHOLDERS’ EQUITY Common Stock – At-the-Market Program On November 13, 2025, the Company entered into an equity distribution agreement, pursuant to which the Company may sell its common shares, no par value, up to a maximum aggregate offering price of $250.0 million (the “November 2025 ATM Program”). As of December 31, 2025, the Company had sold 10.8 million common shares at an average price of $5.37 per share, for net proceeds of $57.0 million after sales agent's commission and other expenses. On January 26, 2026, the Company completed the November 2025 ATM Program, and during the three months ended March 31, 2026, sold 32.5 million common shares at an average price of $5.92 per share, for aggregate net proceeds of $189.7 million after sales agent's commission and other expenses. On March 19, 2026, the Company entered into an equity distribution agreement, pursuant to which the Company may sell its common shares, no par value, up to a maximum aggregate offering price of $250.0 million (the “March 2026 ATM Program”). As of March 31, 2026, the Company did not issue or sell any common shares nor receive any net proceeds pursuant to the March 2026 ATM Program (Note 16). LAC Warrant As described in Note 4, on January 30, 2026, the Company issued the LAC Warrant, which entitles the holder to purchase up to 18,268,687 common shares of the Company at an exercise price of $0.01 per share. Upon issuance of the LAC Warrant, the LAC Warrant liability was derecognized with an offsetting credit of $88.6 million to additional paid-in capital, representing the fair value of the LAC Warrant on the Issuance Date of $88.8 million, net of $0.2 million issuance costs. Equity Incentive Plan On October 3, 2023, the Company adopted an equity incentive plan (the “Plan”), which includes stock options, restricted share units, deferred share units, and performance share units up to an aggregate total of 8.9% of the Company’s issued and outstanding common stock. On June 11, 2025, the Company's shareholders approved an amended and restated Plan, which among other changes, increased the maximum number of common shares available for issuance under the Plan by 14 million common shares. All instruments issued under the Plan are classified as equity and presented in Common stock. |
Loss Per Share |
3 Months Ended |
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Mar. 31, 2026 | |
| Earnings Per Share [Abstract] | |
| Loss Per Share | 10. LOSS PER SHARE Basic net loss per share is computed by dividing the net loss attributable to the Company’s shareholders by the weighted-average number of common shares outstanding during the period, which includes shares issuable for little to no consideration upon the exercise of the LAC Warrant subsequent to being equity-classified. Diluted net loss per share is computed similar to basic loss per share, except the weighted average number of common shares outstanding are increased to include additional shares from the assumed exercise of equity instruments, if dilutive. Potentially dilutive common shares include those under share-based payment arrangements (stock options, restricted share units, deferred share units, and performance share units) and the Orion convertible debt (Note 8). |
General and Administrative Expenses |
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| General and Administrative Expenses | 11. GENERAL AND ADMINISTRATIVE EXPENSES The following table summarizes the Company’s general and administrative expenses:
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Transaction Costs |
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| Investments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Transaction Costs | 12. TRANSACTION COSTS The Company has expensed transaction costs in relation to the following transactions:
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Supplemental Disclosure With Respect to Cash Flows |
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| Supplemental Cash Flow Elements [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Disclosure With Respect to Cash Flows | 13. SUPPLEMENTAL DISCLOSURE WITH RESPECT TO CASH FLOWS
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Fair Values of Financial Instruments |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Values of Financial Instruments | 14. FAIR VALUES OF FINANCIAL INSTRUMENTS (a) Financial instruments not measured at fair value Except as disclosed below, the carrying value of the financial assets and liabilities where the measurement basis is other than fair value approximate their fair values due to the immediate or short-term nature of these instruments considering there have been no significant changes in credit and market interest rates since the original date. Cash and restricted cash, receivables, accounts payable, royalty obligations, Notes, PPA and the DOE Loan are measured at amortized cost. (b) Measurement of fair value The fair value hierarchy requires the use of observable market inputs whenever such inputs exist. A financial instrument is classified in the lowest level of the hierarchy for which a significant input has been considered in measuring fair value. The fair value hierarchy establishes three levels to classify the significance of inputs to valuation techniques used in making fair value measurements of all financial assets and liabilities. At March 31, 2026 and December 31, 2025, there were no financial assets and financial liabilities measured and recognized at fair value on a non-recurring basis subsequent to initial recognition. The following table identifies the Company’s assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy. The carrying value is equal to the fair value at each date reported.
1 For the three months ended March 31, 2026 and 2025, respectively, a loss on change in fair value of $0.1 million (2025 - $0.2 million) was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 2 At March 31, 2026, the Company determined the fair value of the investment was $nil based on a review of Ascend Elements’ public disclosures, which indicated there was significant uncertainty regarding the recovery of the Company’s investment. For the three months ended March 31, 2026 and 2025, respectively, a loss on change in fair value of $4.5 million (2025 - $1.7 million) was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 3 The fair value of the LAC Warrant, immediately prior to the issuance of the warrants on January 30, 2026, was $88.8 million calculated using Level 3 inputs and represents the intrinsic value using a share price of $4.87 at January 30, 2026, and the assumed exercise price of $0.01 per share. For the three months ended March 31, 2026, a loss on change in fair value of $5.0 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). As described in Note 4, the LAC Warrant obligation was reclassified to equity on January 30, 2026. The fair value of the LAC Warrant at December 31, 2025, was calculated using Level 3 inputs and represents the intrinsic value using a share price of $4.36, assumed exercise price of $0.01 per share and estimates of the impact of increases to equity prior to the number of shares being fixed at the time of issuance of the warrant certificates. 4 The fair value of the JV Warrant inclusive of the Put, Call and Exchange Agreement obligations was calculated using Level 3 inputs, including the implied value of the underlying non-voting units, calculated by reference to the market capitalization of the Company’s common shares and the estimated fair value of assets and liabilities of the Company other than its interest in Lithium Nevada Ventures (at the valuation dates, as well as the estimate of time value based on the assumed exchange ratio of 7.82% at March 31, 2026 and at December 31, 2025 and the estimated impacts of anticipated future increases in net assets above the JV). For the three months ended March 31, 2026, a gain on change in fair value of $5.4 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 5 The fair value of the conversion derivative was determined using a Partial Differential Equation method with the following inputs and assumptions at March 31, 2026: expected volatility of 47%, share price of $3.95, risk-free rate of 3.9%, and no expected dividends. For the three months ended March 31, 2026, a gain on change in fair value of $14.3 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). The Company has, where appropriate, estimated the fair value of financial instruments for which the amortized cost carrying value may be significantly different than the fair value. As of March 31, 2026 and December 31, 2025, this includes the following:
1 The estimated fair value involved Level 3 inputs and was determined using a discounted cash flow with a discount rate of 26.7% at March 31, 2026 (December 31, 2025 - 26.1%). 2 The estimated fair value involved Level 3 inputs and was determined using a discounted cash flow with the following inputs and assumptions: average lithium production of 41,500 tonnes per year, average lithium price of $15,082 and discount rate of 27.3% at March 31, 2026 (December 31, 2025 - 26.8%). 3 The estimated fair value involved Level 3 inputs and was determined using a discount rate of 26.7% at March 31, 2026 (December 31, 2025 - 26.1%). 4 The estimated fair value involved Level 3 inputs and was determined using a discount rate of 10.0% at March 31, 2026 (December 31, 2025 - 8.0%). |
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Commitments |
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments | 15. COMMITMENTS The Company has entered into certain long-term purchase agreements related to long-lead equipment, infrastructure and services related to the construction of the processing plant as well as development and mining services at Thacker Pass. These commitments contain certain fixed and determinable cost components, as well as components that are variable based on time and materials. The following represents the fixed and determinable portion of the commitments, excluding lease components disclosed in Note 7, for each of the next five years.
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Subsequent Events |
3 Months Ended |
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Mar. 31, 2026 | |
| Subsequent Events [Abstract] | |
| Subsequent Events | 16. SUBSEQUENT EVENT Common Stock – At-the-Market Program Subsequent to March 31, 2026, the Company issued and sold an aggregate total of 2.3 million common shares at an average price of $5.20 per share pursuant to the March 2026 ATM Program, for aggregate net proceeds of $11.2 million after sales agent commission and other expenses. |
Summary of Significant Accounting Policies (Policies) |
3 Months Ended |
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Mar. 31, 2026 | |
| Accounting Policies [Abstract] | |
| Basis of Presentation | Basis of Presentation The unaudited condensed consolidated interim financial statements (the “Interim Statements”) of the Company have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, they do not include all the information and notes required by U.S. GAAP for complete financial statements. The Interim Statements include all adjustments considered necessary by management to fairly state the financial position, results of operations and cash flows for the interim periods reported. The operating results for the interim periods presented are not necessarily indicative of results that may be expected for any other interim period or for the full year. These Interim Statements are expressed in U.S. dollars (“USD”), the Company’s presentation and functional currency. These Interim Statements should be read in conjunction with the annual consolidated financial statements and notes thereto and the summary of significant accounting policies included in the Company’s annual report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on March 19, 2026 (the “Fiscal 2025 Annual Financial Statements”). These policies have been applied on a consistent basis for all periods. Information related to recent accounting pronouncements, which are not yet effective, is included in Note 2 to the Fiscal 2025 Annual Financial Statements. These Interim Statements have been prepared on the assumption that the Company is a going concern and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business for the next 12 months. |
| Recently Issued Accounting Pronouncements | Recently Issued Accounting Pronouncements In December 2025, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2025-11, “Interim Reporting (Topic 270): Narrow-scope improvements” (“ASU 2025-11”). The amendments clarify the scope, form, and content of interim financial statement disclosures and improve the navigability of Topic 270 without changing existing interim reporting requirements. ASU 2025-11 provides a comprehensive list of required interim disclosures and establishes a new disclosure principle requiring entities to disclose events that occur after the end of the last annual reporting period. ASU 2025-11 is effective for interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact the amended guidance will have on its interim financial reporting and related disclosures. |
Cash and Restricted Cash (Tables) |
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| Cash and Cash Equivalents [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Cash and Restricted Cash |
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Mineral Properties, Plant and Equipment, Net (Tables) |
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| Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Mineral Properties, Plant and Equipment, Net |
1 At March 31, 2026, included prepaid construction costs of $92.4 million (December 31, 2025 - $75.0 million) and deposits on long-lead equipment of $296.8 million (December 31, 2025 - $268.7 million), all related to Thacker Pass. In addition, amount included capitalized amounts for deferred interest on the Notes of $15.7 million (December 31, 2025 - $13.0 million), discount amortization of $12.3 million on the Notes and PPA (December 31, 2025 - $9.1 million), deferred interest on the DOE Loan of $8.1 million (December 31, 2025 - $2.3 million), and $3.3 million of interest on other loans (December 31, 2025 - $3.2 million). |
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Accrued Liabilities (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Liabilities, Current [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accrued Liabilities | Accrued liabilities are comprised of the following items:
|
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Lease Liabilities (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Lease Liabilities | Lease liabilities include the following:
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Department of Energy Loan Facility and Warrant Obligations (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Initial Recognition of Loan | The following table represents a reconciliation from the initial recognition of advances under the DOE Loan to March 31, 2026.
1 First advance in the amount of $435.0 million bearing fixed contractual interest of 4.38%, with repayment beginning in January 2029. 2 Second advance in the amount of $432.0 million bearing fixed contractual interest of 4.41%, with repayment beginning in January 2029. |
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| Summary of Fair Value of the Warrant Obligations | The following table represents a reconciliation from the initial recognition of the obligations pursuant to the LAC Warrant and the JV Warrant to the fair value of the warrant obligations at March 31, 2026.
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Joint Venture With General Motors (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Net Assets, Respective Interests and Non-controlling Interest | The net assets, respective interests and non-controlling interest of Lithium Nevada Ventures as of March 31, 2026 and December 31, 2025, are as follows:
1
The Company allocates income and net assets between the controlling and non-controlling interests based on a hypothetical liquidation at book value. |
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Convertible Debt, Royalty and Production Payment Arrangements (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Reconciliation Includes Initial Recognition of the Components of Investment | The following reconciliation includes initial recognition of the components of the Orion Investment and activity to March 31, 2026:
|
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| Summary of royalty subject to repurchase recorded as a financial liability |
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General and Administrative Expenses (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| General and Administrative Expense [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of General and Administrative Expenses | The following table summarizes the Company’s general and administrative expenses:
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Transaction Costs (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Investments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Investment Transaction Costs | The Company has expensed transaction costs in relation to the following transactions:
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Supplemental Disclosure With Respect to Cash Flows (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Cash Flow Elements [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Other Cash Information |
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Fair Values of Financial Instruments (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of the Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following table identifies the Company’s assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy.
1 For the three months ended March 31, 2026 and 2025, respectively, a loss on change in fair value of $0.1 million (2025 - $0.2 million) was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 2 At March 31, 2026, the Company determined the fair value of the investment was $nil based on a review of Ascend Elements’ public disclosures, which indicated there was significant uncertainty regarding the recovery of the Company’s investment. For the three months ended March 31, 2026 and 2025, respectively, a loss on change in fair value of $4.5 million (2025 - $1.7 million) was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 3 The fair value of the LAC Warrant, immediately prior to the issuance of the warrants on January 30, 2026, was $88.8 million calculated using Level 3 inputs and represents the intrinsic value using a share price of $4.87 at January 30, 2026, and the assumed exercise price of $0.01 per share. For the three months ended March 31, 2026, a loss on change in fair value of $5.0 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). As described in Note 4, the LAC Warrant obligation was reclassified to equity on January 30, 2026. The fair value of the LAC Warrant at December 31, 2025, was calculated using Level 3 inputs and represents the intrinsic value using a share price of $4.36, assumed exercise price of $0.01 per share and estimates of the impact of increases to equity prior to the number of shares being fixed at the time of issuance of the warrant certificates. 4 The fair value of the JV Warrant inclusive of the Put, Call and Exchange Agreement obligations was calculated using Level 3 inputs, including the implied value of the underlying non-voting units, calculated by reference to the market capitalization of the Company’s common shares and the estimated fair value of assets and liabilities of the Company other than its interest in Lithium Nevada Ventures (at the valuation dates, as well as the estimate of time value based on the assumed exchange ratio of 7.82% at March 31, 2026 and at December 31, 2025 and the estimated impacts of anticipated future increases in net assets above the JV). For the three months ended March 31, 2026, a gain on change in fair value of $5.4 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). 5
The fair value of the conversion derivative was determined using a Partial Differential Equation method with the following inputs and assumptions at March 31, 2026: expected volatility of 47%, share price of $3.95, risk-free rate of 3.9%, and no expected dividends. For the three months ended March 31, 2026, a gain on change in fair value of $14.3 million was recognized in the Condensed Consolidated Interim Statements of Income (Loss). |
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| Summary of Carrying Amount and Fair Values | The Company has, where appropriate, estimated the fair value of financial instruments for which the amortized cost carrying value may be significantly different than the fair value. As of March 31, 2026 and December 31, 2025, this includes the following:
1 The estimated fair value involved Level 3 inputs and was determined using a discounted cash flow with a discount rate of 26.7% at March 31, 2026 (December 31, 2025 - 26.1%). 2 The estimated fair value involved Level 3 inputs and was determined using a discounted cash flow with the following inputs and assumptions: average lithium production of 41,500 tonnes per year, average lithium price of $15,082 and discount rate of 27.3% at March 31, 2026 (December 31, 2025 - 26.8%). 3 The estimated fair value involved Level 3 inputs and was determined using a discount rate of 26.7% at March 31, 2026 (December 31, 2025 - 26.1%). 4
The estimated fair value involved Level 3 inputs and was determined using a discount rate of 10.0% at March 31, 2026 (December 31, 2025 - 8.0%). |
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Commitments (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Fixed and Determinable Portion of Commitments, Excluding Lease Components with Maturity | The following represents the fixed and determinable portion of the commitments, excluding lease components disclosed in Note 7, for each of the next five years.
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Cash and Restricted Cash - Summary of Cash and Restricted Cash (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
||
|---|---|---|---|---|---|---|
| Cash and Cash Equivalents [Abstract] | ||||||
| Cash | $ 758,512 | $ 568,226 | ||||
| Restricted cash | 449,113 | 337,383 | ||||
| Total | [1] | $ 1,207,625 | $ 905,609 | $ 446,908 | $ 594,173 | |
| ||||||
Cash and Restricted Cash - Additional Information (Details) $ in Thousands, $ in Millions |
Mar. 31, 2026
USD ($)
|
Mar. 31, 2026
CAD ($)
|
Dec. 31, 2025
USD ($)
|
Mar. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
||
|---|---|---|---|---|---|---|---|
| Cash and Cash Equivalents [Line Items] | |||||||
| Cash and restricted cash | [1] | $ 1,207,625 | $ 905,609 | $ 446,908 | $ 594,173 | ||
| Cash | 758,512 | 568,226 | |||||
| Collateral Agent [Member] | Depositary Bank [Member] | |||||||
| Cash and Cash Equivalents [Line Items] | |||||||
| Deposit | 448,800 | 337,100 | |||||
| CAD [Member] | |||||||
| Cash and Cash Equivalents [Line Items] | |||||||
| Cash and restricted cash | $ 0.7 | 1,400 | |||||
| USD [Member] | |||||||
| Cash and Cash Equivalents [Line Items] | |||||||
| Cash and restricted cash | $ 1,200,000 | $ 904,200 | |||||
| |||||||
Mineral Properties, Plant and Equipment, Net - Schedule of Mineral Properties, Plant and Equipment, Net (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
||
|---|---|---|---|---|
| Property, Plant and Equipment [Line Items] | ||||
| Total mineral properties, plant and equipment | $ 1,698,864 | $ 1,358,227 | ||
| Accumulated depreciation | (31,567) | (14,223) | ||
| Total mineral properties, plant and equipment, net | 1,667,297 | 1,344,004 | ||
| Thacker Pass - construction in progress [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total mineral properties, plant and equipment | [1] | 1,477,108 | 1,235,620 | |
| Thacker Pass - property, plant and equipment [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total mineral properties, plant and equipment | 197,111 | 98,740 | ||
| Machinery and Equipment [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total mineral properties, plant and equipment | 3,955 | 3,955 | ||
| Finance Lease Right of Use Assets [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total mineral properties, plant and equipment | $ 20,690 | $ 19,912 | ||
| ||||
Mineral Properties, Plant and Equipment, Net - Schedule of Mineral Properties, Plant and Equipment, Net (Parenthetical) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Property, Plant and Equipment [Line Items] | |||
| Discount amortization | $ 999 | $ 3,403 | |
| Deferred interest cost | 2,727 | 12,978 | |
| Thacker Pass [Member] | |||
| Property, Plant and Equipment [Line Items] | |||
| Prepaid construction costs | 92,400 | 75,000 | $ 75,000 |
| Interest on other loans | 3,300 | 3,200 | |
| Deferred interest on DOE loan | 8,100 | 2,300 | |
| Discount amortization | 12,300 | 9,100 | |
| Deferred interest cost | 15,700 | 13,000 | |
| Deposits on long-lead equipment | $ 296,800 | $ 268,700 | $ 268,700 |
Mineral Properties, Plant and Equipment, Net - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Restricted Stock Units (RSUs) [Member] | Thacker Pass [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Stock-based compensation, capitalized | $ 0.7 | $ 0.3 |
Department of Energy Loan Facility and Warrant Obligations - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Jan. 30, 2026 |
Oct. 07, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 20, 2024 |
Oct. 28, 2024 |
|
| Line of Credit Facility [Line Items] | |||||||
| Maximum borrowing capacity | $ 2,260,000 | ||||||
| Deferred financing costs (Note 4) | $ 224,398 | $ 311,808 | |||||
| Fair value of warrant at inception | $ 394,116 | 144,888 | 234,091 | ||||
| Remeasured fair value | (417) | $ (160,025) | $ 0 | ||||
| LAC Warrants [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Warrants exercise price | $ 0.01 | ||||||
| Fair value of warrant at inception | $ 88,800 | ||||||
| Warrant obligation, percent | 5.00% | ||||||
| Remeasured fair value | 88,600 | ||||||
| Gross fair value of warrants | 88,800 | ||||||
| Issuance cost | $ 200 | ||||||
| JV Warrants [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Warrant obligation, percent | 5.00% | ||||||
| Thacker Pass [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Ownership percentage | 100.00% | ||||||
| DOE loan [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Maximum borrowing capacity | $ 2,230,000 | 1,970,000 | |||||
| Construction amount | 256,000 | ||||||
| Aggregate principal amount | $ 1,970,000 | ||||||
| Deferred financing costs (Note 4) | 400,200 | ||||||
| Fair value of warrant at inception | 394,100 | ||||||
| Debt facility, cost incurred | $ 6,100 | ||||||
| Percentage of deferred financing cost first advance | 6.36% | ||||||
| Percentage of deferred financing cost second advance | 6.45% | ||||||
| DOE loan [Member] | LAC Warrants [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Warrants to purchase shares of common stock | 18,268,687 | ||||||
| Percentage of non-voting non-transferable equity interest | 5.00% | ||||||
| Warrants exercise price | $ 0.01 | ||||||
| DOE loan [Member] | JV Warrants [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Warrants to purchase shares of common stock | 8,656,509,695 | ||||||
| Percentage of non-voting non-transferable equity interest | 5.00% | ||||||
| Warrants exercise price | $ 0.0001 | ||||||
| ATVM Loan [Member] | |||||||
| Line of Credit Facility [Line Items] | |||||||
| Maximum borrowing capacity | $ 289,600 | ||||||
Department of Energy Loan Facility and Warrant Obligations - Summary of Initial Recognition of Loan (Details) - USD ($) $ in Thousands |
2 Months Ended | 3 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
||||||
| Line of Credit Facility [Line Items] | ||||||||
| Deferred interest cost | $ 2,727 | $ 12,978 | ||||||
| DOE loan [Member] | ||||||||
| Line of Credit Facility [Line Items] | ||||||||
| Initial recognition on Begining Balance | $ 435,000 | [1] | 438,761 | |||||
| Initial recognition, debt issuance costs | (88,362) | [1] | (87,774) | |||||
| Additional advance | [2] | 432,000 | ||||||
| Additional advance, debt issuance costs | [2] | (87,753) | ||||||
| Deferred interest cost | 3,761 | 6,568 | ||||||
| Amortization of debt issuance costs | 588 | 1,066 | ||||||
| Balance, debt issuance costs | (87,774) | (174,461) | (87,774) | |||||
| Ending Balance | 438,761 | 877,329 | 438,761 | |||||
| Loans Outstanding Net [Member] | ||||||||
| Line of Credit Facility [Line Items] | ||||||||
| Initial recognition on Begining Balance | 346,638 | [1] | 350,987 | |||||
| Additional advance | [2] | 344,247 | ||||||
| Deferred interest cost | 3,761 | 6,568 | ||||||
| Amortization of debt issuance costs | 588 | 1,066 | ||||||
| Ending Balance | $ 350,987 | $ 702,868 | $ 350,987 | |||||
| ||||||||
Department of Energy Loan Facility and Warrant Obligations - Summary of Initial Recognition of Loan (Parenthetical) (Details) - DOE loan [Member] - USD ($) $ in Thousands |
3 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Oct. 20, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
||||||
| Line of Credit Facility [Line Items] | ||||||||
| First advance amount | $ 435,000 | [1] | $ 877,329 | $ 438,761 | ||||
| Second advance amount | [2] | $ 432,000 | ||||||
| Fixed Contractual Interest Rate | 4.38% | 4.41% | ||||||
| ||||||||
Department of Energy Loan Facility and Warrant Obligations - Summary of Fair Value of the Warrant Obligations (Details) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Jan. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
|
| Class of Warrant or Right [Line Items] | ||||
| Initial recognition on October 7, 2025 | $ 234,091 | $ 394,116 | ||
| Loss/(gain) on change in fair value | (417) | (160,025) | $ 0 | |
| LAC Warrant issued | (88,786) | |||
| Ending Balance | 144,888 | 234,091 | ||
| LAC Warrants [Member] | ||||
| Class of Warrant or Right [Line Items] | ||||
| Initial recognition on October 7, 2025 | 83,796 | 143,391 | ||
| Loss/(gain) on change in fair value | 4,990 | (59,595) | ||
| LAC Warrant issued | $ 88,800 | (88,786) | ||
| Ending Balance | 0 | 83,796 | ||
| JV Warrants [Member] | ||||
| Class of Warrant or Right [Line Items] | ||||
| Initial recognition on October 7, 2025 | 150,295 | 250,725 | ||
| Loss/(gain) on change in fair value | (5,407) | (100,430) | ||
| Ending Balance | $ 144,888 | $ 150,295 | ||
Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Accrued Liabilities, Current [Abstract] | ||
| Trade accruals | $ 87,154 | $ 72,843 |
| Employee-related benefits | 1,671 | 10,598 |
| Total | $ 88,825 | $ 83,441 |
Lease Liabilities - Schedule Of Lease Liabilities (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Lessee, Lease, Description [Line Items] | ||
| Current portion of lease liabilities | $ 5,787 | $ 5,530 |
| Non-current portion of lease liabilities | 16,803 | 15,668 |
| Vehicle and equipment leases [Member] | ||
| Lessee, Lease, Description [Line Items] | ||
| Finance Leases , Current | 4,901 | 4,758 |
| Finance Leases, Non-current | 8,889 | 9,471 |
| Office leases [Member] | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating Leases, Current | 813 | 699 |
| Operating Leases, Non-current | 6,083 | 4,371 |
| Land lease [Member] | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating Leases, Current | 73 | 73 |
| Operating Leases, Non-current | $ 1,831 | $ 1,826 |
Joint Venture With General Motors - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Aug. 05, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Joint Venture with GM [Member] | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Formation description | On October 15, 2024, the Company and GM entered into an investment agreement (“GM Investment Agreement”) to establish a joint venture for the purpose of funding, developing, constructing and operating Thacker Pass as described in Note 4 to the Fiscal 2025 Annual Financial Statements. As of the closing of the JV in December 2024, and as at March 31, 2026, t | ||
| Joint Venture Closing Date1 | 2024-12 | ||
| Ownership percentage | 62.00% | ||
| Letters of credit released amount | $ 195.0 | ||
| Cash and Restricted Cash | $ 528.9 | $ 412.6 | |
| Management services agreement and incentive compensation | $ 13.0 | $ 9.2 | |
| General Motors Holdings LLC [Member] | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Ownership percentage | 38.00% |
Joint Venture With General Motors - Schedule of Net Assets, Respective Interests and Non-controlling Interest (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|||
| Schedule of Equity Method Investments [Line Items] | |||||
| Assets | $ 3,112,729 | $ 2,579,048 | |||
| Liabilities | (1,235,849) | (992,399) | |||
| GM's non-controlling interest | 532,932 | 527,895 | |||
| The Company's controlling interest | 1,343,948 | 1,058,754 | |||
| Non-controlling interest in Lithium Nevada Ventures | |||||
| Balance at beginning of period | 527,895 | ||||
| Non-controlling interests share of income | 5,037 | $ (824) | |||
| Balance at end of period | 532,932 | 527,895 | |||
| Lithium Nevada Ventures [Member] | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Assets | 2,405,221 | 2,059,293 | |||
| Liabilities | (1,002,770) | (670,097) | |||
| Net assets | 1,402,451 | 1,389,196 | |||
| GM's non-controlling interest | 532,932 | 527,895 | |||
| The Company's controlling interest | 869,519 | 861,301 | |||
| Non-controlling interest in Lithium Nevada Ventures | |||||
| Balance at beginning of period | 527,895 | $ 310,336 | 310,336 | ||
| Capital contribution | 0 | 70,930 | |||
| Non-controlling interests share of income | [1] | 5,037 | 35,825 | ||
| Balance at end of period | 532,932 | 527,895 | |||
| General Motors Holdings LLC [Member] | |||||
| Non-controlling interest in Lithium Nevada Ventures | |||||
| Capital contribution | $ 0 | $ 110,804 | |||
| |||||
Convertible Debt, Royalty and Production Payment Arrangements - Additional Information (Details) $ / shares in Units, $ in Thousands, shares in Millions |
1 Months Ended | ||||
|---|---|---|---|---|---|
|
Apr. 01, 2025
USD ($)
Tonnes
$ / shares
|
Oct. 31, 2025
USD ($)
shares
|
Mar. 31, 2026
USD ($)
|
Dec. 31, 2025
USD ($)
|
Mar. 31, 2025
USD ($)
|
|
| Gain Contingencies [Line Items] | |||||
| Obligated to gross revenue royalty | 20.00% | ||||
| Orion Resource Partners LP (Orion) [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Aggregate principal amount | $ 195,000 | ||||
| Delayed Draw Notes [Member] | Orion Resource Partners LP (Orion) [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Additional commitment amount | $ 30,000 | ||||
| Convertible Debt [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Aggregate principal amount | $ 113,205 | $ 110,478 | $ 195,000 | ||
| Initial conversion price | $ / shares | $ 3.78 | ||||
| Debt conversion amount | $ 97,500 | ||||
| Shares issued for debt conversion | shares | 25.8 | ||||
| Interest rate on convertible debt | 9.875% | ||||
| Maturity date | Apr. 01, 2030 | ||||
| Effective interest | 26.70% | ||||
| PPA [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Effective interest | 27.30% | ||||
| Fixed and variable payments recieved | Tonnes | 41,500 | ||||
| Phase 1 of Thacker Pass [Member] | Orion Resource Partners LP (Orion) [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Investments | $ 250,000 | ||||
| Thacker Pass [Member] | Orion Resource Partners LP (Orion) [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Amount paid for exchange | $ 25,000 | ||||
| Thacker Pass [Member] | |||||
| Gain Contingencies [Line Items] | |||||
| Obligated to gross revenue royalty | 8.00% | ||||
| Mineral claims | $ 22,000 | ||||
| Rate of royalty | 4.00% | ||||
| Option at any time to reduce rate of royalty | 1.75% |
Convertible Debt, Royalty and Production Payment Arrangements - Schedule of Reconciliation Includes Initial Recognition of the Components of Investment (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Gain Contingencies [Line Items] | ||
| Total Convertible Debt, Beginning | $ 160,017 | $ 187,801 |
| Deferred interest cost | 2,727 | 12,978 |
| Unamortized Discount, Discount amortization | 999 | 3,403 |
| Embedded Derivative, Loss on embedded derivative | (14,304) | 166,743 |
| Total Convertible Debt, Derecognition on conversion to common shares | (210,908) | |
| Total Convertible Debt, Ending | 149,439 | 160,017 |
| PPA [Member] | ||
| Gain Contingencies [Line Items] | ||
| Recognition principal amount, Beginning | 29,684 | 23,953 |
| Unamortized Discount, Discount amortization | 2,200 | 5,731 |
| Recognition Principal Amount, Ending | 31,884 | 29,684 |
| Convertible Debt [Member] | ||
| Gain Contingencies [Line Items] | ||
| Recognition principal amount , Beginning | 110,478 | 195,000 |
| Unamortized Discount, Initial recognition, Beginning | (52,829) | (104,399) |
| Embedded Derivative, Initial recognition, , Beginning | 102,368 | 97,200 |
| Deferred interest cost | 2,727 | 12,978 |
| Unamortized Discount, Discount amortization | 999 | 3,403 |
| Embedded Derivative, Loss on embedded derivative | (14,304) | 166,743 |
| Recognition Principal Amount, Derecognition on conversion to common shares | (97,500) | |
| Unamortized Discount, Derecognition on conversion to common shares | 48,167 | |
| Embedded Derivative of Derecognition on Conversion to Common Shares | (161,575) | |
| Recognition Principal Amount, Ending | 113,205 | 110,478 |
| Unamortized Discount, Initial recognition, Ending | (51,830) | (52,829) |
| Embeded Derivative, Ending | $ 88,064 | $ 102,368 |
Convertible Debt, Royalty and Production Payment Arrangements - Summary of royalty subject to repurchase recorded as a financial liability (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Production Payment Agreement | $ 31,884 | $ 29,684 |
| Royalty | 21,272 | 21,160 |
| Total | $ 53,156 | $ 50,844 |
Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Mar. 19, 2026 |
Jan. 30, 2026 |
Nov. 13, 2025 |
Oct. 03, 2023 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Oct. 07, 2025 |
Jun. 11, 2025 |
|
| Class of Stock [Line Items] | ||||||||
| Common stock, par value | $ 0 | $ 0 | ||||||
| Fair value of warrant at inception | $ 144,888 | $ 234,091 | $ 394,116 | |||||
| ATM Program [Member] | ||||||||
| Class of Stock [Line Items] | ||||||||
| Common stock, par value | $ 0 | $ 0 | ||||||
| Net proceeds | $ 189,700 | $ 57,000 | ||||||
| Common Stock [Member] | ATM Program [Member] | ||||||||
| Class of Stock [Line Items] | ||||||||
| Maximum aggregate offering price | $ 250,000 | $ 250,000 | ||||||
| Sold common shares pursuant to the ATM Program | 32,500,000 | 10,800,000 | ||||||
| Average price per share | $ 5.92 | $ 5.37 | ||||||
| LAC Warrant [Member] | ||||||||
| Class of Stock [Line Items] | ||||||||
| Sold common shares pursuant to the ATM Program | 18,268,687 | |||||||
| Warrants exercise price | $ 0.01 | |||||||
| Offsetting credit | $ 88,600 | |||||||
| Fair value of warrant at inception | 88,800 | |||||||
| Warrant issuance costs | $ 200 | |||||||
| Equity Incentive Plan [Member] | ||||||||
| Class of Stock [Line Items] | ||||||||
| Aggregate percentage of issued and outstanding common stock | 8.90% | |||||||
| Amended and Restated Equity Incentive Plan [Member] | Maximum [Member] | ||||||||
| Class of Stock [Line Items] | ||||||||
| Increased the maximum number of available common shares for issuance | 14,000,000 |
General and Administrative Expenses - Summary of General and Administrative Expenses (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Condensed Income Statements, Captions [Line Items] | ||
| Total | $ 11,097 | $ 6,517 |
| General and Administrative Expense [Member] | ||
| Condensed Income Statements, Captions [Line Items] | ||
| Salaries, benefits and directors' fees | 3,858 | 2,268 |
| Stock-based compensation | 2,138 | 1,033 |
| Professional fees | 2,400 | 1,360 |
| Office and administration | 1,671 | 1,286 |
| Other | $ 1,030 | $ 570 |
Transaction Costs - Schedule of Investment Transaction Costs (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Investments [Abstract] | ||
| DOE Loan | $ 1,001 | $ 150 |
| Other financing activities | 0 | 4,152 |
| Total | $ 1,001 | $ 4,302 |
Supplemental Disclosure With Respect to Cash Flows - Schedule of Other Cash Information (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Supplemental Cash Flow Information [Abstract] | ||
| Interest received on cash deposits | $ 6,045 | $ 1,390 |
| Interest paid | (285) | (372) |
| Non-cash investing and financing activities | ||
| Total non-cash additions to mineral properties, plant and equipment composed of: | 41,314 | (40,036) |
| Right-of-use assets obtained in exchange for new finance lease liabilities | 778 | 0 |
| Capitalization of stock-based compensation | 712 | 345 |
| Capitalization of depreciation | 17,329 | 1,211 |
| Capitalization of interest on the Orion Investment | 5,926 | 0 |
| Capitalization of interest on the DOE Loan | 7,634 | 0 |
| Capitalization of non-cash interest | 112 | 110 |
| Deposits on long-lead equipment and other long-term prepaids | 0 | (52,123) |
| Other non-cash transactions including working capital changes | 8,823 | 10,421 |
| Right-of-use assets obtained in exchange for new operating lease liabilities | 1,954 | 0 |
| Settlement of LAC Warrant obligation through issuance of equity-classified warrants | $ 88,786 | $ 0 |
Fair Values of Financial Instruments - Schedule of the Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Financial assets | ||||||||||||
| Financial assets | $ 256 | $ 4,863 | ||||||||||
| Financial liabilities | ||||||||||||
| Financial liabilities | 232,952 | 336,459 | ||||||||||
| Level 1 [Member] | Investment in Green Technology Metals Limited [Member] | ||||||||||||
| Financial assets | ||||||||||||
| Financial assets | [1] | 256 | 365 | |||||||||
| Level 3 [Member] | Embedded Derivative [Member] | ||||||||||||
| Financial liabilities | ||||||||||||
| Financial liabilities | [2] | 88,064 | 102,368 | |||||||||
| Level 3 [Member] | Investment in Ascend Elements [Member] | ||||||||||||
| Financial assets | ||||||||||||
| Financial assets | [3] | 0 | 4,498 | |||||||||
| Level 3 [Member] | LAC Warrants [Member] | ||||||||||||
| Financial liabilities | ||||||||||||
| Financial liabilities | [4] | 0 | 83,796 | |||||||||
| Level 3 [Member] | JV Warrants [Member] | ||||||||||||
| Financial liabilities | ||||||||||||
| Financial liabilities | [5] | $ 144,888 | $ 150,295 | |||||||||
| ||||||||||||
Fair Values of Financial Instruments - Schedule of the Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis (Parenthetical) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jan. 30, 2026 |
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Gain/Loss on change in fair value | $ (4,607,000) | $ (1,956,000) | ||
| LAC Warrant issued | (88,786,000) | |||
| Fair value loss recognized on the embedded derivative | 14,304,000 | $ (166,743,000) | ||
| LAC Warrants [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Gain/Loss on change in fair value | (5,000,000) | |||
| LAC Warrant issued | $ 88,800,000 | (88,786,000) | ||
| Share price | $ 4.87 | $ 4.36 | ||
| Warrants exercise price | $ 0.01 | $ 0.01 | ||
| JV Warrants [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Gain/Loss on change in fair value | $ 5,400,000 | |||
| Assumed exchange ratio | 7.82% | 7.82% | ||
| Embedded Derivative [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Expected volatility | 47.00% | |||
| Share price | $ 3.95 | |||
| Risk-free rate | 3.90% | |||
| Expected dividends | $ 0 | |||
| Fair value loss recognized on the embedded derivative | 14,300,000 | |||
| Investment in Ascend Elements [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Gain/Loss on change in fair value | (4,500,000) | (1,700,000) | ||
| Investment in Green Technology Metals Limited [Member] | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Gain/Loss on change in fair value | $ (100,000) | $ (200,000) | ||
Fair Values of Financial Instruments - Summary of Carrying Amount and Fair Values (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||
| Royalty obligation | [1] | $ 21,272 | $ 21,160 | |||||||
| Production payment obligation, Carrying Value | [2] | 31,884 | 29,684 | |||||||
| Convertible Debt host , Carrying Value | [3] | 61,375 | 57,649 | |||||||
| DOE Loan, Carrying Value | [4] | 702,868 | 350,987 | |||||||
| Total, Carrying Value | 817,399 | 459,480 | ||||||||
| Royalty obligation | [1] | 14,491 | 13,699 | |||||||
| Production payment obligation, Fair Value | [2] | 30,437 | 32,717 | |||||||
| Convertible Debt, Fair Value | [3] | 64,914 | 62,367 | |||||||
| DOE Loan, Fair Value | [4] | 505,818 | 301,630 | |||||||
| Total, Fair Value | $ 615,660 | $ 410,413 | ||||||||
| ||||||||||
Fair Values of Financial Instruments - Summary of Carrying Amount and Fair Values (Parenthetical) (Details) |
Mar. 31, 2026
USD ($)
Tonnes
|
Dec. 31, 2025 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discounted cash flow with a weighted average discount rate | 27.30% | 26.80% |
| Average production per year | Tonnes | 41,500 | |
| Average price | $ | 15,082 | |
| Convertible Debt host [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discount rate | 26.70% | 26.10% |
| DOE loan [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discount rate | 10.00% | 8.00% |
| Fair Value, Inputs, Level 3 [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discounted cash flow with a weighted average discount rate | 26.70% | 26.10% |
Commitments - Schedule of Fixed and Determinable Portion of Commitments, Excluding Lease Components with Maturity (Details) $ in Thousands |
Mar. 31, 2026
USD ($)
|
|---|---|
| Long-Term Purchase Commitment [Line Items] | |
| 2026 | $ 61,945 |
| 2027 | 33,251 |
| 2028 | 25,489 |
| 2029 | 24,314 |
| 2030 | 24,314 |
| Thereafter | 213,574 |
| Long-Lead Equipment [Member] | |
| Long-Term Purchase Commitment [Line Items] | |
| 2026 | 10,757 |
| 2027 | 639 |
| 2028 | 3,837 |
| 2029 | 3,837 |
| 2030 | 3,837 |
| Thereafter | 7,035 |
| Infrastructure [Member] | |
| Long-Term Purchase Commitment [Line Items] | |
| 2026 | 0 |
| 2027 | 3,413 |
| 2028 | 20,477 |
| 2029 | 20,477 |
| 2030 | 20,477 |
| Thereafter | 206,539 |
| Service Contracts [Member] | |
| Long-Term Purchase Commitment [Line Items] | |
| 2026 | 51,188 |
| 2027 | 24,049 |
| 2028 | 0 |
| 2029 | 0 |
| 2030 | 0 |
| Thereafter | 0 |
| Other commitments [Member] | |
| Long-Term Purchase Commitment [Line Items] | |
| 2026 | 0 |
| 2027 | 5,150 |
| 2028 | 1,175 |
| 2029 | 0 |
| 2030 | 0 |
| Thereafter | $ 0 |
Subsequent Events - Additional Information (Details) - March 2026 ATM Program [Member] $ / shares in Units, shares in Millions, $ in Millions |
Mar. 31, 2026
USD ($)
$ / shares
shares
|
|---|---|
| Subsequent Event [Line Items] | |
| Net proceeds | $ | $ 11.2 |
| Common Stock [Member] | |
| Subsequent Event [Line Items] | |
| Sold common shares pursuant to the ATM Program | shares | 2.3 |
| Average price per share | $ / shares | $ 5.2 |