Vista Gold (VGZ) 10-K 28 Feb 25 2024 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 24, 2025	Jun. 28, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
Securities Act File Number	001-09025
Entity Registrant Name	VISTA GOLD CORP.
Entity Incorporation, State or Country Code	A1
Entity Tax Identification Number	98-0542444
Entity Address, Address Line One	8310 S Valley Hwy, Suite 300
Entity Address, Postal Zip Code	80112
Entity Address, City or Town	Englewood
Entity Address, State or Province	CO
City Area Code	720
Local Phone Number	981-1185
Title of 12(b) Security	Common Shares, no par value
Trading Symbol	VGZ
Security Exchange Name	NYSEAMER
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction Flag	false
Entity Public Float			$ 57,476,000
Entity Common Stock, Shares Outstanding		123,752,011
Entity Central Index Key	0000783324
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
Auditor Name	Davidson & Company LLP
Auditor Firm ID	731
Auditor Location	Vancouver, Canada

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 16,950	$ 6,069
Other current assets	553	446
Total current assets	17,503	6,515
Non-current assets:
Mineral properties (Note 3)	920	2,146
Plant and equipment, net (Note 4)	482	204
Other non-current assets	69	69
Total non-current assets	1,471	2,419
Total assets	18,974	8,934
Current liabilities:
Accounts payable	160	190
Accrued liabilities and other (Note 5)	886	749
Total current liabilities	1,046	939
Non-current liabilities:
Deferred gain on grant of royalty (Note 6)		3,000
Other liabilities	21	44
Total non-current liabilities	21	3,044
Total liabilities	1,067	3,983
Commitments and contingencies (Note 8)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2024 - 123,552,011 and 2023 - 121,088,494 (Note 7)	478,061	476,354
Accumulated deficit	(460,154)	(471,403)
Total shareholders' equity	17,907	4,951
Total liabilities and shareholders' equity	$ 18,974	$ 8,934

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Shareholders' equity:
Common Shares, par value	$ 0	$ 0
Common Stock, Shares Authorized, Unlimited [Fixed List]	Unlimited	Unlimited
Common shares outstanding	123,552,011	121,088,494

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME/(LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Operating income (expense):
Exploration, property evaluation and holding costs	$ (3,458)	$ (3,220)
Corporate administration	(3,663)	(3,504)
Depreciation and amortization	(55)	(40)
Gain on grant of royalty interest in mineral titles (Note 6)	16,909
Gain on sale of plant and equipment (Note 4)	802
Total operating income (expense), net	10,535	(6,764)
Non-operating income (expense):
Interest income	701	263
Other income (expense)	13	(84)
Total non-operating income	714	179
Income (loss) before income taxes	11,249	(6,585)
Net income (loss)	$ 11,249	$ (6,585)
Basic:
Weighted average number of shares outstanding (in shares)	122,198,006	120,471,317
Net income (loss) per share	$ 0.09	$ (0.05)
Diluted:
Weighted average number of shares outstanding (in shares)	125,611,300	120,471,317
Net income (loss) per share	$ 0.09	$ (0.05)

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Accumulated Deficit	Total
Balances, beginning of period at Dec. 31, 2022	$ 474,847	$ (464,818)	$ 10,029
Balances, beginning of period (in shares) at Dec. 31, 2022	118,480,878
Shares issued, net of offering costs	$ 1,013		1,013
Shares issued, net of offering costs (in shares)	1,710,068
Shares issued (RSUs vested, net of shares withheld)	$ (142)		$ (142)
Shares issued (RSUs vested, net of shares withheld) (in shares)	412,548
Shares issued (shares issued in exchange for vested DSUs) (in shares)	485,000		485,000
Stock-based compensation	$ 636		$ 636
Net income (loss)		(6,585)	(6,585)
Balances, end of period at Dec. 31, 2023	$ 476,354	(471,403)	4,951
Balances, end of period (in shares) at Dec. 31, 2023	121,088,494
Shares issued, net of offering costs	$ 1,108		1,108
Shares issued, net of offering costs (in shares)	1,722,966
Shares issued (RSUs vested, net of shares withheld)	$ (85)		$ (85)
Shares issued (RSUs vested, net of shares withheld) (in shares)	445,551
Shares issued (shares issued in exchange for vested DSUs) (in shares)	295,000		295,000
Stock-based compensation	$ 684		$ 684
Net income (loss)		11,249	11,249
Balances, end of period at Dec. 31, 2024	$ 478,061	$ (460,154)	$ 17,907
Balances, end of period (in shares) at Dec. 31, 2024	123,552,011

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ 11,249	$ (6,585)
Adjustments to reconcile net income (loss) to net cash used in operations:
Depreciation and amortization	55	40
Stock-based compensation	684	636
Gain on grant of royalty interest in mineral titles	(16,909)
Gain on sale of plant and equipment	(802)
Change in working capital account items:
Other current assets	(107)	91
Accounts payable, accrued liabilities and other	95	(43)
Net cash used in operating activities	(5,735)	(5,861)
Cash flows from investing activities:
Proceeds from grant of royalty interest in mineral titles	17,000	3,000
Net proceeds from sale of plant and equipment	802
Additions to plant and equipment	(344)	(51)
Capitalized mineral property development costs	(1,865)
Net cash provided by investing activities	15,593	2,949
Cash flows from financing activities:
Proceeds from equity financing, net	1,108	1,013
Payment of taxes from withheld shares	(85)	(142)
Net cash provided by financing activities	1,023	871
Net increase (decrease) in cash and cash equivalents	10,881	(2,041)
Cash and cash equivalents, beginning of period	6,069	8,110
Cash and cash equivalents, end of period	$ 16,950	$ 6,069

Nature of Operations

Nature of Operations	12 Months Ended
	Dec. 31, 2024
Nature of Operations
Nature of Operations	1. Nature of Operations ​ Vista Gold Corp. and its subsidiaries operate as a development-stage company in the gold mining industry. The Company’s flagship asset is the Mt Todd gold project (“Mt Todd” or the “Project”) in Northern Territory, Australia. Our strategy is to position Mt Todd as a development opportunity within the gold sector. Since acquiring Mt Todd in 2006, we have invested substantial financial resources to systematically explore, evaluate, engineer, permit, and de-risk the Project. We do not currently generate recurring positive cash flows from mining operations. ​ References to $ are to United States dollars and A$ are to Australian dollars.

Significant Accounting Policies

Significant Accounting Policies and Estimates	12 Months Ended
	Dec. 31, 2024
Significant Accounting Policies and Estimates
Significant Accounting Policies and Estimates	2. Significant Accounting Policies and Estimates ​ Principles of Consolidation ​ The Consolidated Financial Statements include the accounts of Vista and its subsidiaries, all of which are 100%-owned subsidiaries, either directly or indirectly through a subsidiary, and under Vista’s control. All significant intercompany balances and transactions have been eliminated. The Consolidated Financial Statements have been prepared in accordance with U.S. GAAP. ​ Use of Estimates ​ Preparation of the Company’s Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions are: gain recognition; asset impairments; capitalization of development costs; valuation allowances for deferred tax assets; uncertain tax positions; the fair value and accounting treatment of stock-based compensation; and the provision for environmental liabilities. Management based its estimates on historical experience, evaluation of pertinent circumstances, and various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results will likely differ from amounts estimated in these consolidated financial statements. ​ Cash and Cash Equivalents ​ Cash and cash equivalents include cash on hand and government securities with original maturities of 90 days or less when purchased. ​ Foreign Currency Transactions ​ Our functional currency is the U.S. dollar. Foreign currency transactions denominated in currency other than the functional currency are recorded at the approximate rate of exchange at the transaction date and any gains/(losses) resulting therefrom are recorded in other expense. For each of the years ended December 31, 2024 and 2023, net foreign currency gains/(losses) were insignificant. ​ Mineral Properties ​ Mineral property acquisition costs, including directly related costs, are capitalized when incurred. After acquisition of a mineral property, associated exploration and evaluation costs are expensed as incurred until mineral reserves ​ Capitalized costs associated with a mineral property will be amortized using the units-of-production method over the estimated life of mineral reserves once sustainable production is achieved. If mineral properties are sold or abandoned, any unamortized costs will be charged to expense in that period. ​ The recoverability of the carrying values of our mineral properties is dependent upon economic reserves being discovered or developed on the properties, permitting, financing, start-up, and profitable commercial production from, or the sale/lease of, or other strategic transactions related to these properties. Development and/or start-up of mineral properties will depend on, among other things, management’s ability to raise sufficient capital for these purposes. Proceeds received from option or conveyance agreements for unproved properties are ascribed to recovery of the carrying value of the related project until the carrying value reaches zero. Thereafter, any additional proceeds received are recognized as a contract liability (deferred option gain) until control has transferred to the buyer and substantial obligations of the Company have been met, or the related contract terminates. Gains on disposal and grant of royalty interests are recognized in operating income when the Company has completed its significant obligations. ​ We assess the carrying value of mineral properties for impairment whenever information or circumstances indicate the potential for impairment. Such evaluations compare estimated future net cash flows with our carrying costs and future obligations on an undiscounted basis. If it is determined that the estimated future undiscounted cash flows are less than the carrying value of the property, a write-down to the estimated fair value will then be reported in our Consolidated Statement of Income/(Loss) for the period. ​ Impairment ​ Carrying values of long-lived assets, other than mineral properties, are evaluated for impairment when information becomes available that indicates the carrying value may not be recoverable. If it is determined that the fair value is less than the carrying value an impairment charge equal to the difference between the fair value and the carrying value will be recorded in our Consolidated Statements of Income/(Loss). ​ Stock-Based Compensation ​ Under our stock option, long-term incentive, and deferred share unit plans, the Company can grant stock incentive options, restricted share units, and deferred share units to executives, employees, consultants, and non-employee directors as applicable. Compensation expense for such grants is recorded in the Consolidated Statements of Income/(Loss) as a component of exploration, property evaluation and holding costs and corporate administration, with a corresponding increase to Common Shares in the Consolidated Balance Sheets. The fair value of option grants is calculated using the Black-Scholes option pricing model. The fair value of restricted and deferred share units is based on the closing price of our Common Shares on the grant date, or, in certain cases, amounts determined by a Brownian motion pricing model. The expense is based on the fair value of the grant on the grant date and is recognized over the vesting period specified for each grant. Forfeitures of unvested awards for all stock-based compensation result in expense reversal upon forfeiture. ​ Accounting for Income Taxes ​ We account for income taxes by recognizing deferred tax assets and liabilities for differences between the financial statement and tax bases of assets and liabilities at enacted tax rates in effect for the year in which the differences are expected to reverse. Changes in enacted tax rates are recognized in the period that includes the enactment date. Valuation allowances are recorded to reduce deferred tax assets to net amounts estimated to be more likely than not of being realized. ​ The Company evaluates its income tax positions and recognizes a liability for uncertain tax positions that are not more likely than not to be sustained by tax authorities. If the Company were to determine that uncertain tax positions meet the criteria for recognition, an estimated liability and related interest and penalties would be recognized as income tax expense. ​ Fair Value of Financial Instruments ​ Our financial instruments include cash and cash equivalents, accounts payable, and certain other current assets and liabilities. Due to the short-term nature of these financial instruments, carrying amounts approximate fair value. ​ Reclassifications ​ Certain amounts presented have been reclassified within the Operating Income (Expense) section of the Consolidated Statements of Income/(Loss) to conform with the current period presentation, including a prior year reclassification from Exploration, property evaluation and holding costs to Corporate Administration. ​ Recently Adopted Accounting Standards In 2024, we adopted ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures Recently Issued Accounting Pronouncements Not Yet Adopted ​ In November 2024, FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses ​

Mineral Properties

Mineral Properties	12 Months Ended
	Dec. 31, 2024
Mineral Properties
Mineral Properties	3. Mineral Properties ​ Mt Todd, Northern Territory, Australia ​ Capitalized mineral property values were: ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 ​ Mt Todd, Australia ​ $ 920 ​ $ 2,146 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Vista acquired Mt Todd in March 2006. The purchase price and related transaction costs of $2,146 were capitalized as mineral properties. Since 2006, the Company has systematically advanced the Project through exploration, metallurgical testing, engineering, environmental/operational permitting activities, and ongoing site management activities. Prior to 2024, costs associated with these and other related activities were charged to expense as incurred. ​ Drilling and related costs are capitalized for an ore body where proven and probable mineral reserves exist, and the activities are directed at obtaining additional information about the ore body or converting measured, indicated, and inferred mineral resources to proven and probable mineral reserves. All other drilling and related costs are expensed as incurred. Capitalized mineral property development drilling costs totaled $1,865 in the year ended December 31, 2024. The Company derecognized $3,091 of mineral property costs, inclusive of $945 of capitalized development drilling costs, in June 2024 upon recognition of the gain on grant of a royalty interest in Mt Todd, see Note 6. See Note 8 for a discussion of commitments and contingencies associated with Mt Todd.

Plant and Equipment

Plant and Equipment	12 Months Ended
	Dec. 31, 2024
Plant and Equipment
Plant and Equipment	4. Plant and Equipment ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ December 31, 2023 ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ Cost Depreciation Net Cost Depreciation Net Mt Todd, Australia ​ $ 5,732 ​ $ 5,250 ​ $ 482 ​ $ 5,415 ​ $ 5,211 ​ $ 204 ​ Corporate, United States ​ ​ 303 ​ ​ 303 ​ ​ — ​ ​ 303 ​ ​ 303 ​ ​ — ​ ​ ​ $ 6,035 ​ $ 5,553 ​ $ 482 ​ $ 5,718 ​ $ 5,514 ​ $ 204 ​ ​ In March 2024, the Company recorded a gain of $802 upon sale of certain components of our used mill equipment. Gross proceeds totaling $900 were offset by selling expenses of $98.

Other Current Liabilities

Other Current Liabilities	12 Months Ended
	Dec. 31, 2024
Other Current Liabilities
Other Current Liabilities	5. Other Current Liabilities ​ The following table sets forth the Company’s accrued liabilities and other at December 31, 2024 and December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 ​ Accrued accounts payable ​ $ 273 ​ $ 152 ​ Accrued employee compensation and benefits ​ ​ 576 ​ ​ 597 ​ Other current liabilities ​ ​ 37 ​ ​ — ​ ​ ​ $ 886 ​ $ 749 ​ ​

Deferred Gain on Grant of Royal

Deferred Gain on Grant of Royalty	12 Months Ended
	Dec. 31, 2024
Deferred Gain on Grant of Royalty
Deferred Gain on Grant of Royalty	6. Deferred Gain on Grant of Royalty ​ On December 13, 2023, Vista Gold Australia Pty. Ltd. (“Vista Gold Australia”), a wholly owned subsidiary of the Company, entered into a royalty agreement with Wheaton Precious Metals (Cayman) Co., an affiliate of Wheaton Precious Metals Corp. (“Wheaton”) in relation to Mt Todd (the “Royalty Agreement”). ​ Pursuant to the terms of the Royalty Agreement, Wheaton agreed to provide Vista with $20,000 cash to advance Mt Todd and for general corporate purposes, excluding direct expenditures for any project other than Mt Todd, in exchange for payments of a portion of the gross revenue from Mt Todd, (the “Royalty”). The Royalty is at a rate of 1% of gross revenue from the Project if the completion objectives for the Project are achieved by April 1, 2028. Beginning April 1, 2028, if the completion objectives for the Project are not achieved, the Royalty shall increase annually at a rate of up to 0.13% to a maximum Royalty rate of 2% . Any annual increases beginning April 1, 2028 shall be reduced on a pro rata basis to the extent that Mt Todd has initiated operations but has yet to achieve a completion test at an average daily processing rate of 15,000 tonnes per day. The Royalty rate, the annual increase percentage, and maximum Royalty rate can each be reduced by one-third upon the occurrence of one of the following events: (i) a change of control of Vista Gold Australia occurs prior to April 1, 2028 and Vista Gold Australia provides timely notice and payment to Wheaton of certain amounts; or (ii) payment to Wheaton of the applicable Royalty associated with Vista Gold Australia delivering 3.47 million gold ounces to a third party. The Royalty is payable on production from both the Mt Todd mining and exploration licenses. Wheaton has also been granted a right of first refusal on future royalties, streams or pre-pays pertaining to Mt Todd. ​ The Royalty Agreement provided for Vista Gold Australia to receive a total of $20,000 in three installments, all of which were received by Vista prior to June 30, 2024. Upon receipt of the final instalment in June 2024, the Company recognized a gain on grant of royalty interest in mineral titles of $16,909. The gain comprises previously deferred instalment payments totaling $10,000 and the $10,000 received for the final instalment, net of the associated mineral property carrying value as of the date the final instalment was received. ​ A security interest was granted by Vista Gold Australia to Wheaton. The security includes, among other things, a mortgage over the Mt Todd tenements and a collateralized interest in the assets, rights and interests of Vista Gold Australia. ​

Common Shares

Common Shares	12 Months Ended
	Dec. 31, 2024
Common Shares
Common Shares	7. Common Shares ​ Equity Financing ​ Vista is party to an at-the-market offering agreement (the “ATM Agreement”) with H. C. Wainwright & Co., LLC (“Wainwright”), under which the Company has the right, but is not obligated, to issue and sell Common Shares through Wainwright (the “ATM Program”). The ATM Agreement was refreshed in November 2024 to allow for aggregate sales proceeds of up to $8,000. No securities can be offered in Canada under the ATM Agreement. As of December 31, 2024, $7,783 remained available under the ATM Program. ​ During the year ended December 31, 2024 the Company sold 1,722,966 Common Shares for net proceeds of $1,108 under the ATM Program. During the year ended December 31, 2023 the Company sold 1,710,068 Common Shares for net proceeds of $1,013 under the ATM Program. Each sale under the ATM Agreement was made pursuant to an “at the market offering” as defined in Rule 415 under the United States Securities Act of 1933, as amended. ​ Other Share Issuances ​ During the years ended December 31, 2024 and 2023, we issued 445,551 and 412,548 Common Shares, respectively, in connection with vesting of restricted share units (“RSUs”). During the years ended December 31, 2024 and 2023, we issued 295,000 and 485,000 Common Shares, respectively, in exchange for deferred share units (“DSUs”) held by directors of the Company whose service on the board of directors ended in those years. ​ Warrants ​ Warrant activity is summarized in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Average ​ Average ​ ​ ​ Warrants ​ Exercise Price ​ Remaining Life ​ ​ Outstanding Per Share (Years) As of December 31, 2022 ​ 7,408,101 ​ $ 1.25 ​ 1.5 ​ As of December 31, 2023 ​ 7,408,101 ​ $ 1.25 ​ 0.5 ​ Expired ​ (7,408,101) ​ $ 1.25 ​ ​ ​ As of December 31, 2024 ​ — ​ ​ ​ ​ ​ ​ ​ All warrants expired on July 12, 2024. ​ Stock-Based Compensation ​ The Company’s stock-based compensation plans include: RSUs currently outstanding under the Company’s long-term equity incentive plan (“LTIP”), DSUs issuable pursuant to the Company’s deferred share unit plan (“DSU Plan”) and stock options (“Stock Options”) issuable under the Company’s stock option plan. Stock-based compensation may be issued to our directors, officers, employees and consultants. The maximum number of Common Shares that may be reserved for issuance under the combined stock-based compensation plans is a variable number equal to 10% of the issued and outstanding Common Shares on a non-diluted basis at any one time. Stock-based compensation may be granted from time to time at the discretion of the Board of Directors of the Company (the “Board of Directors”), with vesting provisions as determined by the Board of Directors. ​ Stock-based compensation expense for the years ended December 31, 2024 and 2023 was: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ 2024 2023 RSUs ​ $ 391 ​ $ 392 ​ DSUs ​ ​ 293 ​ ​ 244 ​ ​ ​ $ 684 ​ $ 636 ​ ​ As of December 31, 2024, unrecognized compensation expense for RSUs was $288 , which is expected to be recognized over a weighted average period of 1.2 years. ​ Restricted Share Units ​ The following table summarizes RSU activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ Number ​ Grant-Date Fair ​ ​ of RSUs Value Per RSU ​ Unvested - December 31, 2022 ​ 1,472,008 $ 0.60 Granted ​ 1,163,000 ​ ​ 0.37 ​ Cancelled/forfeited ​ (335,786) ​ ​ 0.58 ​ Vested, net of shares withheld ​ (412,548) ​ ​ 0.60 ​ Unvested - December 31, 2023 ​ 1,886,674 $ 0.46 Granted ​ 1,736,000 ​ ​ 0.25 ​ Cancelled/forfeited ​ (409,450) ​ ​ 0.50 ​ Vested, net of shares withheld ​ (445,551) ​ ​ 0.59 ​ Unvested - December 31, 2024 ​ 2,767,673 ​ $ 0.30 ​ ​ During the years ended December 31, 2024 and 2023, the Company withheld shares equivalent to the value of employee withholding tax obligations which resulted from RSUs vesting in the period. Shares withheld are considered cancelled/forfeited. ​ Under the LTIP, a portion of the RSU awards vest on a fixed future date providing the recipient continues to be affiliated with Vista on that date. Other RSU awards vest subject to achievement of certain performance and market criteria, including the accomplishment of certain corporate objectives and the Company’s share price performance. Of the unvested RSUs, approximately 31% will vest based on fixed future dates, and approximately 69% will vest on share-price criteria. The minimum vesting period for RSUs is one year . ​ Deferred Share Units ​ The DSU Plan provides for granting of DSUs to non-employee directors. DSUs vest immediately; however, the Company will issue one Common Share for each DSU only after the non-employee director ceases to be a director of the Company. During the year ended December 31, 2024, the Board of Directors granted 767,000 DSUs and the Company recognized $293 of DSU expense. During the year ended December 31, 2023, the Board of Directors granted 420,000 DSUs and the Company recognized $244 of DSU expense. ​ The following table summarizes DSU activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ Number of ​ ​ Grant-Date Fair ​ ​ DSUs ​ Value per DSU Outstanding - December 31, 2022 ​ 1,254,000 ​ $ 0.72 ​ Granted ​ 420,000 ​ ​ 0.58 ​ Shares issued to participants ​ (485,000) ​ ​ 0.69 ​ Outstanding - December 31, 2023 ​ 1,189,000 ​ $ 0.68 ​ Granted ​ 767,000 ​ ​ 0.38 ​ Shares issued to participants ​ (295,000) ​ ​ 0.68 ​ Outstanding - December 31, 2024 ​ 1,661,000 ​ $ 0.54 ​ ​ Stock Options ​ The following table summarizes option activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ Remaining ​ Aggregate ​ ​ ​ Number of ​ Exercise Price ​ Contractual Term ​ Intrinsic ​ ​ Options Per Option (Years) Value Outstanding - December 31, 2022 ​ 1,367,000 $ 0.71 ​ 0.64 ​ $ — ​ Expired ​ (967,000) ​ ​ 0.71 ​ ​ ​ ​ ​ ​ Outstanding - December 31, 2023 ​ 400,000 $ 0.70 ​ 0.47 ​ $ — ​ Expired ​ (350,000) ​ ​ 0.73 ​ ​ ​ ​ ​ ​ Outstanding - December 31, 2024 ​ 50,000 ​ $ 0.51 ​ 0.25 ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Exercisable - December 31, 2024 ​ 50,000 ​ $ 0.51 ​ 0.25 ​ $ 2 ​ ​ Weighted Average Common Shares ​ ​ ​ ​ ​ ​ ​ At December 31, ​ ​ 2024 2023 ​ Basic Common Shares 122,198,006 ​ 120,471,317 ​ Effect of dilutive stock-based awards 3,413,294 ​ — ​ Diluted Common Shares 125,611,300 ​ 120,471,317 ​ ​ Unvested RSUs representing 108,668 Common Shares, Stock Options to purchase 350,000 Common Shares, and warrants to purchase 7,408,101 Common Shares were outstanding during part of the year ended December 31, 2024 but were not included in the computation of diluted weighted average Common Shares outstanding because their effect would have been anti-dilutive. ​ As the Company was in a net loss position for the year ended December 31, 2023, all potentially dilutive Common Shares were considered antidilutive.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies.
Commitments and Contingencies	8. Commitments and Contingencies ​ The Mt Todd site was not reclaimed by the predecessor owners when the mine closed in 2000. Reclamation obligations associated with the period before Vista’s purchase of Mt Todd are presently the responsibility of the Government of the Northern Territory, Australia (the “NT Government”). Vista may, but is not obligated to, give notice to the NT Government that it wishes to commence mining activities at Mt Todd. As a result of any such notice by the Company, the NT Government will transfer to Vista a) certain assets upon terms and conditions to be agreed or determined by an independent valuer and b) the historical rehabilitation liabilities that are presently the responsibility of the NT Government. The historical rehabilitation liabilities to be transferred to Vista are currently stated by the NT Government at approximately A$73 million. ​ Under agreements with the Jawoyn Association Aboriginal Corporation with respect to Mt Todd, we have agreed to a gross proceeds royalty (“GPR”) ranging between 0.125% and 2.0%, depending on prevailing gold prices and foreign exchange rates, and a 1.0% GPR not tied to gold price or foreign exchange rates. The combined GPR ranges from 1.125% to 3.0%. ​ Mt Todd is also subject to the Royalty Agreement with Wheaton; see Note 6. ​ Our exploration and development activities are subject to various laws and regulations governing the protection of the environment and our interactions with community stakeholders, among others. These laws and regulations are continually changing and are generally becoming more restrictive. Future expenditures that may be required for compliance with these laws and regulations cannot be predicted at this time. If the Company determines that it is probable that an obligation exists and the amount can be reasonably estimated, a provision would be recorded. This may include costs associated with actions by the Company and actions attributable to others should no other responsible or potentially responsible parties be identified. We conduct our operations in a manner designed to minimize effects on stakeholders and the environment. ​ In August 2024, an assessment was issued by the Mexican tax authorities, known as the Servicio de Administración Tributaria (“SAT”), to the Company’s Mexican subsidiary, Minera Gold Stake (“MGS”). The assessment disallows the tax basis of certain mineral properties that was established by MGS in 2012 and subsequently utilized to offset taxable income in subsequent years and other deductions taken in 2012 that the SAT concluded should have been deducted over multiple years. In response, MGS filed suit in the Tax Court in the State of Mexico in October 2024. MGS believes it has valid assertions against the SAT assessment and other available tax positions to partially mitigate the assessment issued by the SAT. The outcome of this matter is unknown, but management estimates the effect of a negative court ruling could create a potential liability of up to approximately $3,500 for income taxes, assessable interest, and penalties. ​

Supplemental Cash Flow Informat

Supplemental Cash Flow Information and Material Non-Cash Transactions	12 Months Ended
	Dec. 31, 2024
Supplemental Cash Flow Information and Material Non-Cash Transactions
Supplemental Cash Flow Information and Material Non-Cash Transactions	9. Supplemental Cash Flow Information and Material Non-Cash Transactions ​ As of December 31, 2024 and 2023, all cash and cash equivalents were held as liquid bank deposits and/or government instruments in the United States or Australia. ​ There were no significant non-cash transactions for the years ended December 31, 2024 and 2023.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Taxes
Income Taxes	10. Income Taxes ​ The Company’s U.S. and foreign source income/(loss) were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2024 ​ 2023 U.S. ​ $ (64) ​ $ (154) ​ Canada ​ ​ (14,764) ​ ​ (3,097) ​ Other foreign, net ​ ​ 26,077 ​ ​ (3,334) ​ ​ ​ $ 11,249 ​ $ (6,585) ​ ​ During the years ended December 31, 2024 and 2023, the Company recognized $nil current and deferred income tax expense or benefit in each of the U.S., Canada, and other foreign jurisdictions, due to full valuation allowances within each jurisdiction. ​ Rate Reconciliation ​ Reconciliations between the Company’s combined income (loss) taxed at statutory rates and the income tax (benefit)/expense were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2024 ​ 2023 Combined income taxed at statutory rates ​ $ 2,363 ​ $ (1,383) ​ Increase (decrease) in taxes from: ​ ​ ​ ​ ​ ​ ​ State Tax ​ ​ 9 ​ ​ 5 ​ Stock-based compensation ​ ​ 130 ​ ​ 117 ​ Meals and Entertainment ​ ​ 1 ​ ​ 1 ​ Imputed interest ​ ​ 71 ​ ​ 60 ​ Other adjustments ​ ​ (366) ​ ​ (7) ​ Expiring NOLs ​ ​ — ​ ​ 137 ​ Inflation adjustment ​ ​ — ​ ​ — ​ Prior year provision to actual adjustments ​ ​ (313) ​ ​ 580 ​ Change in U.S. tax rate ​ ​ 4 ​ ​ — ​ Differentials in foreign tax rates ​ ​ 1,464 ​ ​ (484) ​ Changes in foreign exchange rates ​ ​ 1,860 ​ ​ (77) ​ Changes in valuation allowances affecting income tax expense or benefit ​ ​ (5,223) ​ ​ 1,051 ​ Income tax (benefit)/expense ​ $ — ​ $ — ​ ​ Deferred Taxes ​ Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Components of the Company’s deferred tax assets and liabilities were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2024 ​ 2023 Deferred income tax assets ​ ​ ​ ​ ​ ​ ​ Excess tax basis over book basis of property, plant and equipment ​ $ 6,924 ​ $ 7,225 ​ Operating loss carryforwards ​ ​ 41,440 ​ ​ 40,817 ​ Capital loss carryforwards ​ ​ 14,954 ​ ​ 14,394 ​ Capital expenditures ​ ​ 366 ​ ​ 366 ​ Stock compensation ​ ​ 33 ​ ​ 54 ​ VAT recoverable ​ ​ 144 ​ ​ 176 ​ Unrealized foreign exchange gain/loss ​ ​ 6 ​ ​ 7 ​ Offering costs ​ ​ 104 ​ ​ 157 ​ Accrued vacation ​ ​ 24 ​ ​ 22 ​ Other ​ ​ — ​ ​ — ​ Total future tax assets ​ ​ 63,995 ​ ​ 63,218 ​ Valuation allowance for future tax assets ​ ​ (57,995) ​ ​ (63,218) ​ ​ ​ ​ 6,000 ​ ​ — ​ Deferred income tax liabilities ​ ​ ​ ​ ​ ​ ​ Deferred proceeds for tax purposes from royalty transaction ​ ​ 6,000 ​ ​ — ​ Other investments ​ ​ — ​ ​ — ​ ​ ​ ​ 6,000 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Total deferred taxes, net ​ $ — ​ $ — ​ ​ Valuation Allowance on Canadian and Foreign Tax Assets ​ We establish a valuation allowance against income tax assets if, based on available information, it is more likely than not that all of the assets will not be realized. The valuation allowances of $57,995 and $63,218 at December 31, 2024 and 2023, respectively, related mainly to operating loss carryforwards where utilization is not deemed to be more likely than not. The Company periodically assesses both positive and negative evidence to determine whether it is more likely than not that deferred tax assets can be realized prior to expiration. ​ Loss Carryforwards ​ The Company’s tax loss carryforwards expire as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noncapital Canada U.S. Mexico Barbados Total ​ 2025 ​ ​ — ​ ​ — ​ ​ 79 ​ ​ 6 ​ ​ 85 ​ 2026 ​ ​ 1,027 ​ ​ — ​ ​ 815 ​ ​ 5 ​ ​ 1,847 ​ 2027 ​ ​ 847 ​ ​ — ​ ​ — ​ ​ 7 ​ ​ 854 ​ 2028 ​ ​ 5,245 ​ ​ — ​ ​ — ​ ​ 7 ​ ​ 5,252 ​ 2029 ​ ​ 4,022 ​ ​ — ​ ​ — ​ ​ 2 ​ ​ 4,024 ​ 2030 ​ ​ 5,032 ​ ​ 1,359 ​ ​ — ​ ​ 12 ​ ​ 6,403 ​ 2031 ​ ​ 3,806 ​ ​ 3,407 ​ ​ 71 ​ ​ 7 ​ ​ 7,291 ​ 2032 ​ ​ 6,397 ​ ​ 2,323 ​ ​ 49 ​ ​ — ​ ​ 8,769 ​ 2033 ​ ​ 6,185 ​ ​ 3,098 ​ ​ 46 ​ ​ — ​ ​ 9,329 ​ 2034 ​ ​ 4,420 ​ ​ — ​ ​ 82 ​ ​ — ​ ​ 4,502 ​ 2035 ​ ​ 3,729 ​ ​ 2 ​ ​ — ​ ​ — ​ ​ 3,731 ​ 2036 ​ ​ 2,799 ​ ​ 2,655 ​ ​ — ​ ​ — ​ ​ 5,454 ​ 2037 ​ ​ 1,916 ​ ​ 2,482 ​ ​ — ​ ​ — ​ ​ 4,398 ​ 2038 ​ ​ 2,666 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,666 ​ 2039 ​ ​ 3,338 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3,338 ​ 2040 ​ ​ 2,829 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,829 ​ 2041 ​ ​ 3,195 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3,195 ​ 2042 ​ ​ 734 ​ ​ — ​ ​ — ​ ​ — ​ ​ 734 ​ 2043 ​ ​ 2,905 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,905 ​ 2044 ​ ​ 2,470 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,470 ​ ​ ​ $ 63,562 ​ $ 15,326 ​ $ 1,142 ​ $ 46 ​ $ 80,076 ​ ​ U.S. loss carryforwards for tax years beginning in 2018 of $2,372, Canadian capital loss carryforwards of $110,770 and Australian net operating losses of $67,063, which do not expire, are not included in the previous table. ​ Tax Statute of Limitations ​ The Company files income tax returns in Canada, U.S. federal and state jurisdictions, and other foreign jurisdictions. There are currently no tax examinations underway for these jurisdictions. Furthermore, the Company is no longer subject to Canadian tax examinations by the Canadian Revenue Agency for years ended on or before December 31, 2020 or U.S. federal income tax examinations by the Internal Revenue Service for years ended on or before December 31, 2020. Some U.S. state and other foreign jurisdictions are still subject to tax examination for years ended on or before December 31, 2019. ​ Although certain tax years are closed under the statute of limitations, tax authorities can still adjust losses being carried forward to open years. See Note 8 for discussion of ongoing legal matters associated with an assessment by the SAT.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2024
Segment Information
Segment Information	11. Segment Information ​ The Company has one reportable segment: Australia. The Australia segment conducts exploration, development, and care and maintenance activities at Vista’s principal asset, the Mt Todd gold project in Northern Territory, Australia. This segment does not presently report any revenues from operations. Through the Australia segment, the Company seeks to position Mt Todd as a development opportunity within the gold sector. The Company’s chief operating decision maker is the Chief Executive Officer (“CODM”). The CODM uses consolidated net income/loss as the measure of segment profit and loss to assess performance and allocate resources. ​ We reported no revenues during the years ended December 31, 2024 or 2023. The geographic location of mineral properties and plant and equipment is provided in Notes 3 and 4, respectively. ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2024 2023 Australia segment operating income (expense): ​ ​ ​ ​ ​ Gain on grant of royalty interest in mineral titles $ 16,909 ​ $ — Employee Compensation ​ (1,749) ​ ​ (1,675) Drilling ​ (1,891) ​ ​ — Capitalized Development Drilling ​ 1,865 ​ ​ — Project Programs ​ (506) ​ ​ (412) Site Holding ​ (458) ​ ​ (307) Administrative ​ (388) ​ ​ (384) Consulting & Contract Services ​ (201) ​ ​ (222) Power ​ (130) ​ ​ (220) Depreciation and amortization ​ (55) ​ ​ (40) Australia segment operating income (loss) ​ 13,396 ​ ​ (3,260) ​ ​ ​ ​ ​ ​ Reconciliation to operating income (loss) ​ ​ ​ ​ ​ Corporate administration ​ (3,663) ​ ​ (3,504) Gain on sale of plant and equipment ​ 802 ​ ​ — Total operating income (expense), net ​ 10,535 ​ ​ (6,764) ​ ​ ​ ​ ​ ​ Non-operating income: ​ ​ ​ ​ ​ Interest income ​ 701 ​ ​ 263 Other income (expense) ​ 13 ​ ​ (84) Total non-operating income ​ 714 ​ ​ 179 ​ ​ ​ ​ ​ ​ Net income (loss) $ 11,249 ​ $ (6,585) ​ ​ ​ ​ ​ ​ Australia segment expenditures: mineral property and capital assets $ 2,209 ​ $ 51 ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 Australia segment long-lived assets $ 1,402 ​ $ 2,350 ​ ​

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 11,249	$ (6,585)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
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
Rule 10b5-1 Arrangement Modified	false
Non Rule 10b5-1 Arrangement Modified	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	​ Description of Processes for Assessing, Identifying and Managing Cybersecurity Risks ​ Vista’s system of internal controls includes consideration of cybersecurity risks. The Company uses technology and control procedures designed to mitigate cybersecurity risks, with our management team working to monitor, identify, assess , and respond to potential cybersecurity incidents that may threaten the Company. The system of controls also focuses on security awareness and training for employees and contractors with access to Company facilities or systems. Company management periodically reviews system and organization control reports (SOC 1, Type 2) for key outsourced information systems to ensure that third-party data processing is subject to appropriate controls and security measures . Cybersecurity risks for Vista include the potential for financial loss, loss of data, and business interruption. Vista maintains technology and non-technology-based system controls, a data backup program, and disaster recovery testing to mitigate these risks. ​ Our cybersecurity controls also follow defense in depth principles, which aim to implement various layered access control, detection, prevention, and response measures. We periodically engage with third parties to assess our vulnerabilities and help us mitigate cybersecurity-related risks.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Vista’s system of internal controls includes consideration of cybersecurity risks. The Company uses technology and control procedures designed to mitigate cybersecurity risks, with our management team working to monitor, identify, assess , and respond to potential cybersecurity incidents that may threaten the Company. The system of controls also focuses on security awareness and training for employees and contractors with access to Company facilities or systems. Company management periodically reviews system and organization control reports (SOC 1, Type 2) for key outsourced information systems to ensure that third-party data processing is subject to appropriate controls and security measures .
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Board of Directors’ Oversight of Risks from Cybersecurity ​ Management, under supervision of the CEO and CFO, has developed a system of internal controls that identifies risks to the Company, designed controls intended to reduce risks to an appropriately low level, implemented control procedures, and subsequently tested such control procedures. Management presents an enterprise risk management assessment to the Audit Committee on a quarterly basis and provides the Audit Committee with frequent updates of specific financial statement risks. Risks associated with cybersecurity are included in these risk assessments, subjected to testing of key controls, and reflected in management’s reports to the Audit Committee. The Board of Directors receives periodic briefings on selected risk matters, and is invited to participate in each Audit Committee meeting and, as such, is provided with the same information presented to the Audit Committee .
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Audit Committee
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	Management presents an enterprise risk management assessment to the Audit Committee on a quarterly basis and provides the Audit Committee with frequent updates of specific financial statement risks.
Cybersecurity Risk Role of Management [Text Block]	Management’s Role in Assessing and Managing Cybersecurity Risks ​ The Company’s chief executive officer (“CEO”) and chief financial officer (“CFO”) have primary responsibility for cybersecurity risk management and the implementation of processes for identifying, assessing, and managing material risks from cybersecurity threats. Officers of the Company and its Australian subsidiary review, at least quarterly, developments relevant to the Company’s cybersecurity control environment. This group of officers has experience managing public companies and overseeing internal controls associated with cybersecurity. Additional support for information technology (“IT”) general controls and specific cybersecurity matters is provided to the Company through third-party IT specialists. In accordance with the Company’s policies, including its Disclosure Policy and Code of Business Conduct and Ethics, cybersecurity incidents are to be immediately reported to the Vista management team for resolution. Information technology general controls, including controls to mitigate cybersecurity risks, are considered by management during their assessment of the Company’s design and effectiveness of internal controls over financial reporting. Findings from these control procedures are considered by management and, as deemed appropriate to reduce cybersecurity risks to an appropriately low level, are implemented. This may include modification of internal control procedures, adoption of technology solutions, and testing of specific elements of the system of controls.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	chief executive officer (“CEO”) and chief financial officer (“CFO”)
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	This group of officers has experience managing public companies and overseeing internal controls associated with cybersecurity.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Officers of the Company and its Australian subsidiary review, at least quarterly, developments relevant to the Company’s cybersecurity control environment. This group of officers has experience managing public companies and overseeing internal controls associated with cybersecurity. Additional support for information technology (“IT”) general controls and specific cybersecurity matters is provided to the Company through third-party IT specialists. In accordance with the Company’s policies, including its Disclosure Policy and Code of Business Conduct and Ethics, cybersecurity incidents are to be immediately reported to the Vista management team for resolution. Information technology general controls, including controls to mitigate cybersecurity risks, are considered by management during their assessment of the Company’s design and effectiveness of internal controls over financial reporting.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Significant Accounting Polici_2

Significant Accounting Policies and Estimates (Policies)	12 Months Ended
	Dec. 31, 2024
Significant Accounting Policies and Estimates
Principles of Consolidation	​ Principles of Consolidation ​ The Consolidated Financial Statements include the accounts of Vista and its subsidiaries, all of which are 100%-owned subsidiaries, either directly or indirectly through a subsidiary, and under Vista’s control. All significant intercompany balances and transactions have been eliminated. The Consolidated Financial Statements have been prepared in accordance with U.S. GAAP.
Use of Estimates	Use of Estimates ​ Preparation of the Company’s Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions are: gain recognition; asset impairments; capitalization of development costs; valuation allowances for deferred tax assets; uncertain tax positions; the fair value and accounting treatment of stock-based compensation; and the provision for environmental liabilities. Management based its estimates on historical experience, evaluation of pertinent circumstances, and various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results will likely differ from amounts estimated in these consolidated financial statements.
Cash and Cash Equivalents	Cash and Cash Equivalents ​ Cash and cash equivalents include cash on hand and government securities with original maturities of 90 days or less when purchased.
Foreign Currency Translations	Foreign Currency Transactions ​ Our functional currency is the U.S. dollar. Foreign currency transactions denominated in currency other than the functional currency are recorded at the approximate rate of exchange at the transaction date and any gains/(losses) resulting therefrom are recorded in other expense. For each of the years ended December 31, 2024 and 2023, net foreign currency gains/(losses) were insignificant.
Mineral Properties	Mineral Properties ​ Mineral property acquisition costs, including directly related costs, are capitalized when incurred. After acquisition of a mineral property, associated exploration and evaluation costs are expensed as incurred until mineral reserves ​ Capitalized costs associated with a mineral property will be amortized using the units-of-production method over the estimated life of mineral reserves once sustainable production is achieved. If mineral properties are sold or abandoned, any unamortized costs will be charged to expense in that period. ​ The recoverability of the carrying values of our mineral properties is dependent upon economic reserves being discovered or developed on the properties, permitting, financing, start-up, and profitable commercial production from, or the sale/lease of, or other strategic transactions related to these properties. Development and/or start-up of mineral properties will depend on, among other things, management’s ability to raise sufficient capital for these purposes. Proceeds received from option or conveyance agreements for unproved properties are ascribed to recovery of the carrying value of the related project until the carrying value reaches zero. Thereafter, any additional proceeds received are recognized as a contract liability (deferred option gain) until control has transferred to the buyer and substantial obligations of the Company have been met, or the related contract terminates. Gains on disposal and grant of royalty interests are recognized in operating income when the Company has completed its significant obligations. ​ We assess the carrying value of mineral properties for impairment whenever information or circumstances indicate the potential for impairment. Such evaluations compare estimated future net cash flows with our carrying costs and future obligations on an undiscounted basis. If it is determined that the estimated future undiscounted cash flows are less than the carrying value of the property, a write-down to the estimated fair value will then be reported in our Consolidated Statement of Income/(Loss) for the period. ​
Impairment	Impairment ​ Carrying values of long-lived assets, other than mineral properties, are evaluated for impairment when information becomes available that indicates the carrying value may not be recoverable. If it is determined that the fair value is less than the carrying value an impairment charge equal to the difference between the fair value and the carrying value will be recorded in our Consolidated Statements of Income/(Loss).
Stock-Based Compensation	Stock-Based Compensation ​ Under our stock option, long-term incentive, and deferred share unit plans, the Company can grant stock incentive options, restricted share units, and deferred share units to executives, employees, consultants, and non-employee directors as applicable. Compensation expense for such grants is recorded in the Consolidated Statements of Income/(Loss) as a component of exploration, property evaluation and holding costs and corporate administration, with a corresponding increase to Common Shares in the Consolidated Balance Sheets. The fair value of option grants is calculated using the Black-Scholes option pricing model. The fair value of restricted and deferred share units is based on the closing price of our Common Shares on the grant date, or, in certain cases, amounts determined by a Brownian motion pricing model. The expense is based on the fair value of the grant on the grant date and is recognized over the vesting period specified for each grant. Forfeitures of unvested awards for all stock-based compensation result in expense reversal upon forfeiture.
Accounting for Income Taxes	Accounting for Income Taxes ​ We account for income taxes by recognizing deferred tax assets and liabilities for differences between the financial statement and tax bases of assets and liabilities at enacted tax rates in effect for the year in which the differences are expected to reverse. Changes in enacted tax rates are recognized in the period that includes the enactment date. Valuation allowances are recorded to reduce deferred tax assets to net amounts estimated to be more likely than not of being realized. ​ The Company evaluates its income tax positions and recognizes a liability for uncertain tax positions that are not more likely than not to be sustained by tax authorities. If the Company were to determine that uncertain tax positions meet the criteria for recognition, an estimated liability and related interest and penalties would be recognized as income tax expense.
Fair Value of Financial Instruments	Fair Value of Financial Instruments ​ Our financial instruments include cash and cash equivalents, accounts payable, and certain other current assets and liabilities. Due to the short-term nature of these financial instruments, carrying amounts approximate fair value.
Reclassifications	Reclassifications ​ Certain amounts presented have been reclassified within the Operating Income (Expense) section of the Consolidated Statements of Income/(Loss) to conform with the current period presentation, including a prior year reclassification from Exploration, property evaluation and holding costs to Corporate Administration.
Recent Accounting Pronouncements	​ Recently Adopted Accounting Standards In 2024, we adopted ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures Recently Issued Accounting Pronouncements Not Yet Adopted ​ In November 2024, FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses

Mineral Properties (Tables)

Mineral Properties (Tables)	12 Months Ended
	Dec. 31, 2024
Mineral Properties
Schedule of Mineral Properties	Capitalized mineral property values were: ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 ​ Mt Todd, Australia ​ $ 920 ​ $ 2,146 ​ ​ ​ ​ ​ ​ ​ ​ ​

Plant and Equipment (Tables)

Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2024
Plant and Equipment
Schedule Of Plant And Equipment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ December 31, 2023 ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ Cost Depreciation Net Cost Depreciation Net Mt Todd, Australia ​ $ 5,732 ​ $ 5,250 ​ $ 482 ​ $ 5,415 ​ $ 5,211 ​ $ 204 ​ Corporate, United States ​ ​ 303 ​ ​ 303 ​ ​ — ​ ​ 303 ​ ​ 303 ​ ​ — ​ ​ ​ $ 6,035 ​ $ 5,553 ​ $ 482 ​ $ 5,718 ​ $ 5,514 ​ $ 204 ​

Other Current Liabilities (Tabl

Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2024
Other Current Liabilities
Schedule of accrued liabilities	The following table sets forth the Company’s accrued liabilities and other at December 31, 2024 and December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 ​ Accrued accounts payable ​ $ 273 ​ $ 152 ​ Accrued employee compensation and benefits ​ ​ 576 ​ ​ 597 ​ Other current liabilities ​ ​ 37 ​ ​ — ​ ​ ​ $ 886 ​ $ 749 ​ ​

Common Shares (Tables)

Common Shares (Tables)	12 Months Ended
	Dec. 31, 2024
Common Shares
Summary of outstanding warrants	Warrant activity is summarized in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Average ​ Average ​ ​ ​ Warrants ​ Exercise Price ​ Remaining Life ​ ​ Outstanding Per Share (Years) As of December 31, 2022 ​ 7,408,101 ​ $ 1.25 ​ 1.5 ​ As of December 31, 2023 ​ 7,408,101 ​ $ 1.25 ​ 0.5 ​ Expired ​ (7,408,101) ​ $ 1.25 ​ ​ ​ As of December 31, 2024 ​ — ​ ​ ​ ​ ​ ​
Summary of stock-based compensation expense	Stock-based compensation expense for the years ended December 31, 2024 and 2023 was: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ 2024 2023 RSUs ​ $ 391 ​ $ 392 ​ DSUs ​ ​ 293 ​ ​ 244 ​ ​ ​ $ 684 ​ $ 636 ​
Summary of restricted stock unit activity	The following table summarizes RSU activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ Number ​ Grant-Date Fair ​ ​ of RSUs Value Per RSU ​ Unvested - December 31, 2022 ​ 1,472,008 $ 0.60 Granted ​ 1,163,000 ​ ​ 0.37 ​ Cancelled/forfeited ​ (335,786) ​ ​ 0.58 ​ Vested, net of shares withheld ​ (412,548) ​ ​ 0.60 ​ Unvested - December 31, 2023 ​ 1,886,674 $ 0.46 Granted ​ 1,736,000 ​ ​ 0.25 ​ Cancelled/forfeited ​ (409,450) ​ ​ 0.50 ​ Vested, net of shares withheld ​ (445,551) ​ ​ 0.59 ​ Unvested - December 31, 2024 ​ 2,767,673 ​ $ 0.30 ​
Summary of deferred stock units	The following table summarizes DSU activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ Number of ​ ​ Grant-Date Fair ​ ​ DSUs ​ Value per DSU Outstanding - December 31, 2022 ​ 1,254,000 ​ $ 0.72 ​ Granted ​ 420,000 ​ ​ 0.58 ​ Shares issued to participants ​ (485,000) ​ ​ 0.69 ​ Outstanding - December 31, 2023 ​ 1,189,000 ​ $ 0.68 ​ Granted ​ 767,000 ​ ​ 0.38 ​ Shares issued to participants ​ (295,000) ​ ​ 0.68 ​ Outstanding - December 31, 2024 ​ 1,661,000 ​ $ 0.54 ​
Summary of option activity	The following table summarizes option activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ Remaining ​ Aggregate ​ ​ ​ Number of ​ Exercise Price ​ Contractual Term ​ Intrinsic ​ ​ Options Per Option (Years) Value Outstanding - December 31, 2022 ​ 1,367,000 $ 0.71 ​ 0.64 ​ $ — ​ Expired ​ (967,000) ​ ​ 0.71 ​ ​ ​ ​ ​ ​ Outstanding - December 31, 2023 ​ 400,000 $ 0.70 ​ 0.47 ​ $ — ​ Expired ​ (350,000) ​ ​ 0.73 ​ ​ ​ ​ ​ ​ Outstanding - December 31, 2024 ​ 50,000 ​ $ 0.51 ​ 0.25 ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Exercisable - December 31, 2024 ​ 50,000 ​ $ 0.51 ​ 0.25 ​ $ 2 ​
Summary of weighted average common shares	Weighted Average Common Shares ​ ​ ​ ​ ​ ​ ​ At December 31, ​ ​ 2024 2023 ​ Basic Common Shares 122,198,006 ​ 120,471,317 ​ Effect of dilutive stock-based awards 3,413,294 ​ — ​ Diluted Common Shares 125,611,300 ​ 120,471,317 ​

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Taxes
Schedule of income/(loss) before income tax, domestic and foreign	The Company’s U.S. and foreign source income/(loss) were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2024 ​ 2023 U.S. ​ $ (64) ​ $ (154) ​ Canada ​ ​ (14,764) ​ ​ (3,097) ​ Other foreign, net ​ ​ 26,077 ​ ​ (3,334) ​ ​ ​ $ 11,249 ​ $ (6,585) ​
Schedule of effective income tax rate reconciliation	Reconciliations between the Company’s combined income (loss) taxed at statutory rates and the income tax (benefit)/expense were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2024 ​ 2023 Combined income taxed at statutory rates ​ $ 2,363 ​ $ (1,383) ​ Increase (decrease) in taxes from: ​ ​ ​ ​ ​ ​ ​ State Tax ​ ​ 9 ​ ​ 5 ​ Stock-based compensation ​ ​ 130 ​ ​ 117 ​ Meals and Entertainment ​ ​ 1 ​ ​ 1 ​ Imputed interest ​ ​ 71 ​ ​ 60 ​ Other adjustments ​ ​ (366) ​ ​ (7) ​ Expiring NOLs ​ ​ — ​ ​ 137 ​ Inflation adjustment ​ ​ — ​ ​ — ​ Prior year provision to actual adjustments ​ ​ (313) ​ ​ 580 ​ Change in U.S. tax rate ​ ​ 4 ​ ​ — ​ Differentials in foreign tax rates ​ ​ 1,464 ​ ​ (484) ​ Changes in foreign exchange rates ​ ​ 1,860 ​ ​ (77) ​ Changes in valuation allowances affecting income tax expense or benefit ​ ​ (5,223) ​ ​ 1,051 ​ Income tax (benefit)/expense ​ $ — ​ $ — ​
Schedule of deferred tax assets and liabilities	Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Components of the Company’s deferred tax assets and liabilities were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2024 ​ 2023 Deferred income tax assets ​ ​ ​ ​ ​ ​ ​ Excess tax basis over book basis of property, plant and equipment ​ $ 6,924 ​ $ 7,225 ​ Operating loss carryforwards ​ ​ 41,440 ​ ​ 40,817 ​ Capital loss carryforwards ​ ​ 14,954 ​ ​ 14,394 ​ Capital expenditures ​ ​ 366 ​ ​ 366 ​ Stock compensation ​ ​ 33 ​ ​ 54 ​ VAT recoverable ​ ​ 144 ​ ​ 176 ​ Unrealized foreign exchange gain/loss ​ ​ 6 ​ ​ 7 ​ Offering costs ​ ​ 104 ​ ​ 157 ​ Accrued vacation ​ ​ 24 ​ ​ 22 ​ Other ​ ​ — ​ ​ — ​ Total future tax assets ​ ​ 63,995 ​ ​ 63,218 ​ Valuation allowance for future tax assets ​ ​ (57,995) ​ ​ (63,218) ​ ​ ​ ​ 6,000 ​ ​ — ​ Deferred income tax liabilities ​ ​ ​ ​ ​ ​ ​ Deferred proceeds for tax purposes from royalty transaction ​ ​ 6,000 ​ ​ — ​ Other investments ​ ​ — ​ ​ — ​ ​ ​ ​ 6,000 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Total deferred taxes, net ​ $ — ​ $ — ​
Summary of expiring loss carryforwards	The Company’s tax loss carryforwards expire as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noncapital Canada U.S. Mexico Barbados Total ​ 2025 ​ ​ — ​ ​ — ​ ​ 79 ​ ​ 6 ​ ​ 85 ​ 2026 ​ ​ 1,027 ​ ​ — ​ ​ 815 ​ ​ 5 ​ ​ 1,847 ​ 2027 ​ ​ 847 ​ ​ — ​ ​ — ​ ​ 7 ​ ​ 854 ​ 2028 ​ ​ 5,245 ​ ​ — ​ ​ — ​ ​ 7 ​ ​ 5,252 ​ 2029 ​ ​ 4,022 ​ ​ — ​ ​ — ​ ​ 2 ​ ​ 4,024 ​ 2030 ​ ​ 5,032 ​ ​ 1,359 ​ ​ — ​ ​ 12 ​ ​ 6,403 ​ 2031 ​ ​ 3,806 ​ ​ 3,407 ​ ​ 71 ​ ​ 7 ​ ​ 7,291 ​ 2032 ​ ​ 6,397 ​ ​ 2,323 ​ ​ 49 ​ ​ — ​ ​ 8,769 ​ 2033 ​ ​ 6,185 ​ ​ 3,098 ​ ​ 46 ​ ​ — ​ ​ 9,329 ​ 2034 ​ ​ 4,420 ​ ​ — ​ ​ 82 ​ ​ — ​ ​ 4,502 ​ 2035 ​ ​ 3,729 ​ ​ 2 ​ ​ — ​ ​ — ​ ​ 3,731 ​ 2036 ​ ​ 2,799 ​ ​ 2,655 ​ ​ — ​ ​ — ​ ​ 5,454 ​ 2037 ​ ​ 1,916 ​ ​ 2,482 ​ ​ — ​ ​ — ​ ​ 4,398 ​ 2038 ​ ​ 2,666 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,666 ​ 2039 ​ ​ 3,338 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3,338 ​ 2040 ​ ​ 2,829 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,829 ​ 2041 ​ ​ 3,195 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3,195 ​ 2042 ​ ​ 734 ​ ​ — ​ ​ — ​ ​ — ​ ​ 734 ​ 2043 ​ ​ 2,905 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,905 ​ 2044 ​ ​ 2,470 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,470 ​ ​ ​ $ 63,562 ​ $ 15,326 ​ $ 1,142 ​ $ 46 ​ $ 80,076 ​

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Information
Summary of segment information	We reported no revenues during the years ended December 31, 2024 or 2023. The geographic location of mineral properties and plant and equipment is provided in Notes 3 and 4, respectively. ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2024 2023 Australia segment operating income (expense): ​ ​ ​ ​ ​ Gain on grant of royalty interest in mineral titles $ 16,909 ​ $ — Employee Compensation ​ (1,749) ​ ​ (1,675) Drilling ​ (1,891) ​ ​ — Capitalized Development Drilling ​ 1,865 ​ ​ — Project Programs ​ (506) ​ ​ (412) Site Holding ​ (458) ​ ​ (307) Administrative ​ (388) ​ ​ (384) Consulting & Contract Services ​ (201) ​ ​ (222) Power ​ (130) ​ ​ (220) Depreciation and amortization ​ (55) ​ ​ (40) Australia segment operating income (loss) ​ 13,396 ​ ​ (3,260) ​ ​ ​ ​ ​ ​ Reconciliation to operating income (loss) ​ ​ ​ ​ ​ Corporate administration ​ (3,663) ​ ​ (3,504) Gain on sale of plant and equipment ​ 802 ​ ​ — Total operating income (expense), net ​ 10,535 ​ ​ (6,764) ​ ​ ​ ​ ​ ​ Non-operating income: ​ ​ ​ ​ ​ Interest income ​ 701 ​ ​ 263 Other income (expense) ​ 13 ​ ​ (84) Total non-operating income ​ 714 ​ ​ 179 ​ ​ ​ ​ ​ ​ Net income (loss) $ 11,249 ​ $ (6,585) ​ ​ ​ ​ ​ ​ Australia segment expenditures: mineral property and capital assets $ 2,209 ​ $ 51 ​ ​ ​ ​ ​ ​ ​ At December 31, 2024 At December 31, 2023 Australia segment long-lived assets $ 1,402 ​ $ 2,350

Significant Accounting Polici_3

Significant Accounting Policies and Estimates (Details)	12 Months Ended
	Dec. 31, 2024 segment
Significant Accounting Policies and Estimates
Number of reportable segments	1

Mineral Properties - Mt. Todd,

Mineral Properties - Mt. Todd, Northern Territory, Australia (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2006	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Mineral Properties, Net			$ 920	$ 2,146
Capitalization of mine development costs			1,865
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Mineral Properties, Net			920	$ 2,146
Acquisition Costs, Period Cost		$ 2,146
Capitalization of mine development costs			1,865
Mineral Property Costs Derecognized			$ 3,091
Mt Todd, Australia | Mine Development
Property, Plant and Equipment [Line Items]
Mineral Property Costs Derecognized	$ 945

Plant and Equipment (Details)

Plant and Equipment (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Cost		$ 6,035	$ 5,718
Accumulated Depreciation		5,553	5,514
Net		482	204
Gain on sale of plant and equipment		802
Proceeds from sale of plant and equipment		802
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Cost		5,732	5,415
Accumulated Depreciation		5,250	5,211
Net		482	204
Corporate, United States
Property, Plant and Equipment [Line Items]
Cost		303	303
Accumulated Depreciation		303	303
Net		$ 0	$ 0
Used mill equipment, Canada
Property, Plant and Equipment [Line Items]
Gain on sale of plant and equipment	$ 802
Proceeds from sale of plant and equipment	900
Selling costs of plant and equipment	$ 98

Other Current Liabilities - Acc

Other Current Liabilities - Accrued Liabilities and Other (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Other Current Liabilities
Accrued accounts payable	$ 273	$ 152
Accrued employee compensation and benefits	576	597
Other current liabilities	37
Accrued Liabilities, Current, Total	$ 886	$ 749

Deferred Gain on Grant of Roy_2

Deferred Gain on Grant of Royalty (Details) oz in Thousands, $ in Thousands		1 Months Ended	4 Months Ended	12 Months Ended
	Dec. 13, 2023 USD ($) installment oz t	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Gain on Grant of Royalty
Gain on grant of royalty interest in mineral titles				$ 16,909
Proceeds from grant of royalty interest				$ 17,000	$ 3,000
Vista Australia | Subsidiaries | Wheaton | Mt Todd
Gain on Grant of Royalty
Cash advance	$ 20,000
Royalty rate	1%
Increase in royalty rate per annum	0.13%
Threshold limit of average daily processing rate per day | t	15,000
Reduction in royalty rate upon occurrence of events	33.33%
Royalty agreement deliverable benchmark, Commodity amount | oz	3,470
Consideration eligible to receive	$ 20,000
Number of installments for consideration | installment	3
Gain on grant of royalty interest in mineral titles		$ 16,909
Proceeds from grant of royalty interest		$ 10,000	$ 10,000
Vista Australia | Subsidiaries | Wheaton | Maximum | Mt Todd
Gain on Grant of Royalty
Royalty rate	2%

Common Shares - Equity Financin

Common Shares - Equity Financings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) security shares	Dec. 31, 2023 USD ($) shares
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of common shares	$ 1,108	$ 1,013
At-The-Market Offering Agreement | H. C. Wainwright And Co., LLC
Subsidiary, Sale of Stock [Line Items]
Threshold of aggregate sales proceeds	$ 8,000
Offers or sales of common shares under Agreement to be made in Canada | security	0
Remaining threshold of aggregate sales proceeds	$ 7,783
Number of shares issued | shares	1,722,966	1,710,068
Proceeds from issuance of common shares	$ 1,108	$ 1,013

Common Shares - Share Issuances

Common Shares - Share Issuances (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Common Shares
Shares issued (RSUs vested and options (in shares)	445,551	412,548
Shares issued (DSUs vested) (in shares)	295,000	485,000

Common Shares - Warrants (Detai

Common Shares - Warrants (Details) - Warrants - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Class of Warrant or Right [Line Items]
Warrants outstanding, beginning of period (in shares)	7,408,101	7,408,101
Warrants outstanding, Expired (in shares)	(7,408,101)
Warrants outstanding, end of period (in shares)	0	7,408,101	7,408,101
Weighted average exercise price per share, Beginning of the period	$ 1.25	$ 1.25
Weighted average exercise price per share, Expired	$ 1.25
Weighted average exercise price per share, End of the period		$ 1.25	$ 1.25
Weighted average remaining life, warrants outstanding		6 months	1 year 6 months

Common Shares - Stock-Based Com

Common Shares - Stock-Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Percentage of issued and outstanding Common Shares	10%
Stock-based compensation expense	$ 684	$ 636
Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	391	392
Deferred Stock Units (DSU)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	$ 293	$ 244

Common Shares - Unrecognized Co

Common Shares - Unrecognized Compensation (Details) - Restricted Stock Units (RSUs) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation expense related to unvested awards	$ 288
Weighted average unrecognized compensation recognition period	1 year 2 months 12 days

Common Shares - Summary Of Rest

Common Shares - Summary Of Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Payment of taxes from withheld shares	$ 85	$ 142
Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unvested, Number of units, beginning of period (in shares)	1,886,674	1,472,008
Granted, Number of units (in shares)	1,736,000	1,163,000
Cancelled/forfeited, Number of units (in shares)	(409,450)	(335,786)
Vested, net of shares withheld, Number of units (in shares)	(445,551)	(412,548)
Unvested, Number of units, end of period (in shares)	2,767,673	1,886,674
Outstanding, weighted average fair value, beginning of period (in dollars per share)	$ 0.46	$ 0.6
Granted, Weighted average fair value (in dollars per share)	0.25	0.37
Cancelled/forfeited, Weighted average fair value (in dollars per share)	0.5	0.58
Vested, net of shares withheld, Weighted average fair value (in dollars per share)	0.59	0.6
Unvested, weighted average fair value, end of period (in dollars per share)	$ 0.3	$ 0.46
Restricted Stock Units (RSUs) | Vest based on fixed future dates
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting (as a percent)	31%
Restricted Stock Units (RSUs) | Vest on share-price criteria
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting (as a percent)	69%
Restricted Stock Units (RSUs) | Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	1 year

Common Shares - Summary Of Defe

Common Shares - Summary Of Deferred Share Units Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Allocated Share-based Compensation Expense | $	$ 684	$ 636
Deferred Stock Units (DSU)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of common shares issues for each DSU (at end of board members' team).	1
Unvested, Number of units, beginning of period (in shares) | shares	1,189,000	1,254,000
Granted, Number of units (in shares) | shares	767,000	420,000
Shares issued to participants | shares	(295,000)	(485,000)
Unvested, Number of units, end of period (in shares) | shares	1,661,000	1,189,000
Outstanding, weighted average fair value, beginning of period (in dollars per share) | $ / shares	$ 0.68	$ 0.72
Granted, Weighted average fair value (in dollars per share) | $ / shares	0.38	0.58
Shares issued to participants, Weighted average grant-date fair value (in dollars per share) | $ / shares	0.68	0.69
Unvested, weighted average fair value, end of period (in dollars per share) | $ / shares	$ 0.54	$ 0.68
Allocated Share-based Compensation Expense | $	$ 293	$ 244

Common Shares - Summary Of Opti

Common Shares - Summary Of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Shares
Number of options, beginning of period (in shares)	400,000	1,367,000
Number of options, Expired (in shares)	(350,000)	(967,000)
Number of options, end of period (in shares)	50,000	400,000	1,367,000
Number of options, Exercisable (in shares)	50,000
Weighted average exercise price per option, beginning of period (in dollars per share)	$ 0.7	$ 0.71
Weighted average exercise price per option, Expired (in dollars per share)	0.73	0.71
Weighted average exercise price per option, end of period (in dollars per share)	0.51	$ 0.7	$ 0.71
Weighted average exercise price, Exercisable (in dollars per share)	$ 0.51
Weighted average remaining contractual term, Outstanding	3 months	5 months 19 days	7 months 20 days
Weighted average remaining contractual term, Exercisable	3 months
Aggregate intrinsic value, Outstanding, end of period (in dollars)	$ 2
Aggregate intrinsic value, Options, Exercisable	$ 2

Common Shares - Weighted Averag

Common Shares - Weighted Average (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Common Shares
Basic Common Shares	122,198,006	120,471,317
Effect of dilutive stock-based awards	3,413,294	0
Diluted Common Shares	125,611,300	120,471,317

Common Shares - Anti-dilutive (

Common Shares - Anti-dilutive (Details)	12 Months Ended
	Dec. 31, 2024 shares
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares outstanding	350,000
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares outstanding	108,668
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares outstanding	7,408,101

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024 AUD ($)	Dec. 31, 2024 USD ($)
Maximum | Mexican Tax Authority | Subsidiaries
Loss Contingencies [Line Items]
Estimate of Possible Loss		$ 3,500
Mt Todd, Australia | Scenario, Plan
Loss Contingencies [Line Items]
Rehabilitation liabilities	$ 73
Mt Todd, Australia | Scenario, Plan | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Percentage of royalty on gold	1%
Mt Todd, Australia | Scenario, Plan | Minimum | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Gross proceeds royalty, Additional contingent gross proceeds royalty, Percent	0.125%	0.125%
Gross proceeds royalty, Including contingent additional gross proceeds royalty, Percent	1.125%	1.125%
Mt Todd, Australia | Scenario, Plan | Maximum | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Gross proceeds royalty, Additional contingent gross proceeds royalty, Percent	2%	2%
Gross proceeds royalty, Including contingent additional gross proceeds royalty, Percent	3%	3%

Income Taxes - Source of Income

Income Taxes - Source of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income (loss) before income taxes	$ 11,249	$ (6,585)
U.S.
Income (loss) before income taxes, domestic	(64)	(154)
Canada
Income (loss) before income taxes, foreign	(14,764)	(3,097)
Other foreign
Income (loss) before income taxes, foreign	$ 26,077	$ (3,334)

Income Taxes - Deferred Tax Exp

Income Taxes - Deferred Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
U.S.
Current income tax expense (benefit)
Deferred income tax expense (benefit)
Canada
Current income tax expense (benefit)
Deferred income tax expense (benefit)
Other foreign
Current income tax expense (benefit)
Deferred income tax expense (benefit)

Income Taxes - Rate Reconciliat

Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Combined income taxed at statutory rates	$ 2,363	$ (1,383)
State Tax	9	5
Stock-based compensation	130	117
Meals and Entertainment	1	1
Imputed interest	71	60
Other adjustments	(366)	(7)
Expiring NOLs	0	137
Inflation adjustment	0	0
Prior year provision to actual adjustments	(313)	580
Change in U.S. tax rate	4	0
Differentials in foreign tax rates	1,464	(484)
Changes in foreign exchange rates	1,860	(77)
Changes in valuation allowances affecting income tax expense or benefit	(5,223)	1,051
Income tax (benefit)/expense	$ 0	$ 0

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Components of Deferred Tax Assets and Liabilities [Abstract]
Excess tax basis over book basis of property, plant, and equipment	$ 6,924	$ 7,225
Operating loss carryforwards	41,440	40,817
Capital loss carryforwards	14,954	14,394
Capital expenditures	366	366
Stock compensation	33	54
VAT recoverable	144	176
Unrealized foreign exchange gain/loss	6	7
Offering costs	104	157
Accrued vacation	24	22
Other	0	0
Total future tax assets	63,995	63,218
Valuation allowance for future tax assets	(57,995)	(63,218)
Total income tax assets	6,000	0
Deferred proceeds for tax purposes from royalty transaction	6,000	0
Other investments	0	0
Total deferred income tax liabilities	6,000	0
Total deferred taxes, net	$ 0	$ 0

Income Taxes - Operating Loss C

Income Taxes - Operating Loss Carryforward Expirations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Total	$ 80,076
CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	63,562
Capital loss carryforwards		$ 110,770
UNITED STATES
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		2,372
Expiring net operating loss carryforwards	15,326
MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	1,142
BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	46
AUSTRALIA
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 67,063
2025
Operating Loss Carryforwards [Line Items]
Total	85
2025 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	0
2025 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2025 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	79
2025 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	6
2026
Operating Loss Carryforwards [Line Items]
Total	1,847
2026 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	1,027
2026 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2026 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	815
2026 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	5
2027
Operating Loss Carryforwards [Line Items]
Total	854
2027 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	847
2027 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2027 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2027 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	7
2028
Operating Loss Carryforwards [Line Items]
Total	5,252
2028 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	5,245
2028 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2028 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2028 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	7
2029
Operating Loss Carryforwards [Line Items]
Total	4,024
2029 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	4,022
2029 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2029 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2029 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	2
2030
Operating Loss Carryforwards [Line Items]
Total	6,403
2030 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	5,032
2030 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	1,359
2030 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2030 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	12
2031
Operating Loss Carryforwards [Line Items]
Total	7,291
2031 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	3,806
2031 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	3,407
2031 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	71
2031 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	7
2032
Operating Loss Carryforwards [Line Items]
Total	8,769
2032 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	6,397
2032 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	2,323
2032 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	49
2032 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2033
Operating Loss Carryforwards [Line Items]
Total	9,329
2033 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	6,185
2033 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	3,098
2033 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	46
2033 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2034
Operating Loss Carryforwards [Line Items]
Total	4,502
2034 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	4,420
2034 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2034 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	82
2034 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2035
Operating Loss Carryforwards [Line Items]
Total	3,731
2035 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	3,729
2035 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	2
2035 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2035 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2036
Operating Loss Carryforwards [Line Items]
Total	5,454
2036 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	2,799
2036 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	2,655
2036 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2036 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2037
Operating Loss Carryforwards [Line Items]
Total	4,398
2037 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	1,916
2037 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	2,482
2037 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2037 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2038
Operating Loss Carryforwards [Line Items]
Total	2,666
2038 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	2,666
2038 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2038 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2038 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2039
Operating Loss Carryforwards [Line Items]
Total	3,338
2039 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	3,338
2039 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2039 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2039 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2040
Operating Loss Carryforwards [Line Items]
Total	2,829
2040 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	2,829
2040 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2040 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2040 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2041
Operating Loss Carryforwards [Line Items]
Total	3,195
2041 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	3,195
2041 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2041 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2041 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2042
Operating Loss Carryforwards [Line Items]
Total	734
2042 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	734
2042 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2042 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2042 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2043
Operating Loss Carryforwards [Line Items]
Total	2,905
2043 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	2,905
2043 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2043 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2043 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2044
Operating Loss Carryforwards [Line Items]
Total	2,470
2044 | CANADA
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	2,470
2044 | UNITED STATES
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2044 | MEXICO
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	0
2044 | BARBADOS
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	$ 0

Segment Information (Details)

Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)
Segment Information
Number of reportable segments | segment	1
Revenues | $	$ 0	$ 0

Segment Information - Summary o

Segment Information - Summary of segment information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Australia segment operating income (expense):
Gain on grant of royalty interest in mineral titles	$ 16,909
Depreciation and amortization	(55)	$ (40)
Corporate administration	(3,663)	(3,504)
Gain on sale of plant and equipment	802
Total operating income (expense), net	10,535	(6,764)
Non-operating income (expense):
Interest income	701	263
Other income (expense)	13	(84)
Total non-operating income	714	179
Net income (loss)	11,249	(6,585)
Long-lived assets	1,471	2,419
Corporate
Australia segment operating income (expense):
Corporate administration	(3,663)	(3,504)
Australia segment
Non-operating income (expense):
Mineral property and capital assets	2,209	51
Long-lived assets	1,402	2,350
Australia segment | Operating segments
Australia segment operating income (expense):
Gain on grant of royalty interest in mineral titles	16,909
Employee Compensation	(1,749)	(1,675)
Drilling	(1,891)
Capitalized Development Drilling	1,865
Project Programs	(506)	(412)
Site Holding	(458)	(307)
Administrative	(388)	(384)
Consulting & Contract Services	(201)	(222)
Power	(130)	(220)
Depreciation and amortization	(55)	(40)
Total operating income (expense), net	$ 13,396	$ (3,260)