Golden Minerals (AUMN) 10-K 18 Mar 24 2023 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Mar. 18, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	1-13627
Entity Registrant Name	GOLDEN MINERALS COMPANY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-4413382
Entity Address, Address Line One	350 Indiana Street, Suite 650
Entity Address, City or Town	Golden
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80401
City Area Code	303
Local Phone Number	839-5060
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	AUMN
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 10,340
Entity Common Stock, Shares Outstanding		14,573,252
Auditor Name	Haynie & Company
Auditor Firm ID	457
Auditor Location	Salt Lake City, Utah
Entity Central Index Key	0001011509
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents (Note 5)		$ 3,766	$ 3,972
Short-term investments (Note 5)		11	20
Inventories, net (Note 7)		830	1,371
Value added tax receivable, net (Note 8)		3,135	1,465
Prepaid expenses and other assets (Note 6)		972	1,142
Total current assets		8,714	7,970
Property, plant and equipment, net (Note 9)		5,821	6,416
Investments (Note 5)		265	225
Other long-term assets (Note 10)		110	333
Total assets		14,910	14,944
Current liabilities
Accounts payable and other accrued liabilities (Note 11)		4,899	3,709
Other current liabilities (Note 13)		774	640
Total current liabilities		5,673	4,349
Asset retirement and reclamation liabilities (Note 12)		4,096	3,993
Other long-term liabilities (Note 13)		28	122
Total liabilities		9,797	8,464
Commitments and contingencies (Note 20)
Equity (Note 16)
Common stock, $.01 par value, 28,000,000 shares authorized; 14,084,680 and 6,836,735 shares issued and outstanding, respectively (1)	[1]	141	68
Additional paid-in capital		552,160	544,372
Accumulated deficit		(547,188)	(537,960)
Shareholders' equity		5,113	6,480
Total liabilities and equity		$ 14,910	$ 14,944
[1] Reflects the one-for- 25 reverse stock split that became effective June 9, 2023. Refer to Note 1, “Nature of Operations.”

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical)	Dec. 31, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares
CONSOLIDATED BALANCE SHEETS
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Common stock, shares authorized	28,000,000	28,000,000
Common stock, shares issued	14,084,680	6,836,735
Common stock, shares outstanding	14,084,680	6,836,735

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Revenue:
Sale of metals (Note 17)		$ 12,002,000	$ 23,285,000
Total revenue		12,002,000	23,285,000
Costs and expenses:
Cost of metals sold (exclusive of depreciation shown below) (Note 17)		(12,358,000)	(17,538,000)
Exploration expense		(3,401,000)	(9,617,000)
El Quevar project expense		(544,000)	(579,000)
Velardea care and maintenance costs		(1,243,000)	(1,428,000)
Administrative expense		(4,659,000)	(4,496,000)
Stock-based compensation		(405,000)	(744,000)
Reclamation expense		(297,000)	(282,000)
Other operating income, net		2,315,000	1,622,000
Depreciation and amortization		(530,000)	(369,000)
Total costs and expenses		(21,122,000)	(33,431,000)
Loss from operations		(9,120,000)	(10,146,000)
Other income (expense):
Interest and other income (expense), net (Note 18)		32,000	(11,000)
Gain on foreign currency transactions		121,000	339,000
Litigation settlement (Note 20)		(250,000)
Total other income (expense)		(97,000)	328,000
Loss from operations before income taxes		(9,217,000)	(9,818,000)
Income taxes (Note 15)		(11,000)	(88,000)
Net loss		$ (9,228,000)	$ (9,906,000)
Net loss per common share - basic
Net loss per common share - basic	[1]	$ (1.08)	$ (1.49)
Weighted-average shares outstanding - basic	[2]	8,539,811	6,647,398
[1] Reflects the one-for- 25 reverse stock split that became effective June 9, 2023. Refer to Note 1, “Nature of Operations.” Potentially dilutive shares have not been included for loss periods because to do so would be anti-dilutive. Potentially dilutive shares at December 31, 2023, consist of 400,409 equivalent shares related to stock compensation and 11,308,314 equivalent shares related to warrants outstanding. Potentially dilutive shares at December 31, 2022, consist of 440,209 equivalent shares related to stock compensation and 392,154 equivalent shares related to warrants outstanding. See Note 16 for a discussion of stock-based compensation and warrants.

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)	12 Months Ended
	Dec. 31, 2023 shares	Dec. 31, 2022 shares
Employee Stock Option
Dilutive shares	400,409	440,209
Warrant
Dilutive shares	11,308,314	392,154

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Scenario, Previously Reported Common Stock	Scenario, Previously Reported Additional Paid-in Capital	Scenario, Previously Reported Accumulated Deficit	Scenario, Previously Reported	Revision of Prior Period Error Correction Adjustment Accumulated Deficit	Revision of Prior Period Error Correction Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Increase (Decrease) in Stockholders' Equity
Adjustment related to correction of immaterial error (Note 4)					$ (93)	$ (93)
Balance at Dec. 31, 2021	$ 65	$ 542,081	$ (527,961)	$ 14,185			$ 65	$ 542,081	$ (528,054)	$ 14,092
Balance (in shares) at Dec. 31, 2021	6,538,566						6,538,566
Increase (Decrease) in Stockholders' Equity
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 1	727		728
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							111,234
Stock compensation accrued and restricted stock awards granted (Note 16)								744		744
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)							22,000
Warrants exercised (Note 16)							$ 1	1,049		1,050
Warrants exercised (Note 16) (in shares)							120,000
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16)							$ 1	(229)		(228)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16) (in shares)							44,935
Net Income (Loss)									(9,906)	(9,906)
Balance at Dec. 31, 2022							$ 68	544,372	(537,960)	6,480
Balance (in shares) at Dec. 31, 2022							6,836,735
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)								405		405
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 3	1,791		1,794
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							308,930
Public offering (Note 16)							$ 47	3,760		3,807
Public offering (Note 16) (in shares)							4,712,488
Warrants exercised (Note 16)							$ 15	(15)
Warrants exercised (Note 16) (in shares)							1,436,527
Offering and private placement transaction (Note 16)							$ 8	1,847		1,855
Offering and private placement transaction (Note 16) (in shares)							790,000
Net Income (Loss)									(9,228)	(9,228)
Balance at Dec. 31, 2023							$ 141	$ 552,160	$ (547,188)	$ 5,113
Balance (in shares) at Dec. 31, 2023							14,084,680

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical)	Jun. 09, 2023
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited)
Reverse stock split	0.04

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows used in operating activities:
Net cash used in operating activities (Note 19)	$ (9,912)	$ (9,657)
Cash flows from (used in) investing activities:
Proceeds from sale of assets	2,246	125
Investment in Golden Gryphon Explorations Inc.	(40)	(225)
Acquisitions of property, plant and equipment		(52)
Net cash from (used in) investing activities	2,206	(152)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs	7,500	1,780
Common stock shares relinquished to pay taxes		(228)
Net cash from financing activities	7,500	1,552
Net decrease in cash and cash equivalents	(206)	(8,257)
Cash and cash equivalents, beginning of period	3,972	12,229
Cash and cash equivalents, end of period	$ 3,766	$ 3,972

Nature of Operations

Nature of Operations	12 Months Ended
	Dec. 31, 2023
Nature of Operations
Nature of Operations	1. N ature of Operations ​ The Company is a mining company, holding a 100% interest in the Rodeo property in Durango State, Mexico (the “Rodeo Property”), a 100% interest in the Velardeña and Chicago precious metals mining properties and associated oxide and sulfide processing plants in the state of Durango, Mexico (the “Velardeña Properties”), a 100% interest in the El Quevar advanced exploration property in the province of Salta, Argentina, which is subject to the terms of the “Earn-in Agreement” (see Note 9), and a diversified portfolio of precious metals and other mineral exploration properties located primarily in or near historical precious metals producing regions of Mexico, Argentina and Nevada. The Rodeo Property, the Velardeña Properties, the Yoquivo property and the El Quevar advanced exploration property are the Company’s only material properties. ​ We concluded mining operations at the Rodeo Property in June 2023. We commenced mining activities at the Velardeña Properties in December 2023, however, mining operations were shut down in February 2024 because the initial performance of the mine and the processing plant did not achieve the expected results. We are shutting down operations at our Velardeña Properties and holding them for short-term sale while we evaluate alternatives to realize value from the asets. We continue to evaluate and search for mining opportunities in North America (including Mexico) with near-term prospects of mining. We are also focused on advancing our Yoquivo exploration property in Mexico and our El Quevar advanced exploration property in Argentina through the Earn-In Agreement with Barrick. We are holding an additional portfolio of approximately 11 properties, located in Mexico, Nevada and Argentina for sale or advancement when possible. ​ The Company is considered an exploration stage issuer under the criteria set forth by the SEC under Subpart 1300 of Regulation S-K (“S-K 1300”) as the Company has not yet demonstrated the existence of mineral reserves at any of the Company’s properties. As a result, and in accordance with GAAP for exploration stage companies, all expenditures for exploration and evaluation of the Company’s properties are expensed as incurred. As such, the Company’s financial statements may not be comparable to the financial statements of mining companies that have proven and probable mineral reserves. Such companies would typically capitalize certain development costs including infrastructure development and mining activities to access the ore. The capitalized costs would be amortized on a units-of-production basis as reserves are mined. The amortized costs are typically allocated to inventory and eventually to cost of sales as the inventories are sold. As the Company does not have proven and probable mineral reserves, substantially all expenditures at the Company’s Rodeo Property and the Velardeña Properties for mine construction activity, as well as operating costs associated with the mill facilities, and for items that do not have a readily identifiable market value apart from the mineralized material, have been expensed as incurred. Such costs are charged to cost of metals sold or project expense during the period depending on the nature of the costs. Certain costs may be reflected in inventories prior to the sale of the product. The Company cannot be certain that any deposits at any of its properties will ever be confirmed or converted into S-K 1300 compliant “reserves.” ​ Reverse Stock Split ​ On May 26, 2023, the Company’s Board of Directors approved a reverse stock split (the “Reverse Stock Split”) of the Company’s common stock, par value $0.01 per share, at a ratio of one-for- 25 ​ As a result of the Reverse Stock Split, each 25 fractional shares of common stock were issued as a result of the Reverse Stock Split. Any fractional shares resulting from the Reverse Stock Split were rounded up to the nearest whole share of common stock. The common stock of the Company commenced trading on a split-adjusted basis at the open of trading on June 9, 2023. ​ In addition, proportionate adjustments were made to the number of shares issuable upon the exercise or vesting of all outstanding warrants and restricted stock units, resulting in a proportional decrease in the number of shares of common stock reserved for issuance upon exercise or vesting of such warrants and restricted stock units and the number of shares of common stock then reserved for issuance under the Company’s equity compensation plans, including the Company’s 2023 Equity Incentive Plan, which was reduced proportionately. ​ Accordingly, all share and per share data (including share and per share information related to share-based compensation and outstanding warrants), number of shares outstanding and other common stock equivalents for the periods presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect the Reverse Stock Split.

Liquidity, Capital Resources an

Liquidity, Capital Resources and Going Concern	12 Months Ended
	Dec. 31, 2023
Liquidity, Capital Resources and Going Concern
Liquidity, Capital Resources and Going Concern	2. Liquidity, Capital Resources and Going Concern ​ We do not currently have sufficient resources to meet our expected cash needs during the twelve months ended December 31, 2024. At December 31, 2023, we had current assets of approximately $8.7 million, including cash and cash equivalents of approximately $3.8 million. On the same date, we had accounts payable and other current liabilities of approximately $5.7 million. Because we have ceased mining at the Rodeo mine, and have stopped our mining operations at the Velardeña properties, we will need to raise capital through asset sales, equity financing or collection of outstanding VAT receivables. ​ We will require further sources of capital. In order to satisfy the Company’s projected general, administrative, exploration and other expenses through December 31, 2024, we will need approximately $7.6 to $8.6 million in additional capital inflows. These additional capital inflows may take the form of asset sales, equity financing activities, and collection of our outstanding VAT receivable or otherwise. ​ There is no assurance that we will be successful in raising sufficient capital. At March 11, 2024, our available shares authorized but not yet outstanding which could be offered to raise equity was approximately 1.9 million shares out of our 28 million shares authorized. We plan to ask our shareholders to approve an increase in our authorized capital at this years Annual Shareholder’s Meeting, but there can be no assurance this will be approved. In the absence of sufficient asset sales, equity financing or other external funding the Company’s cash balance is expected to be depleted during the second quarter of 2024. ​ The Company’s consolidated financial statements have been prepared on a going concern basis under which an entity is considered to be able to realize its assets and satisfy its liabilities in the normal course of business. However, as noted above, our continuing long-term operations will be dependent upon our ability to secure sufficient funding to generate future profitable operations. The underlying value and recoverability of the amounts shown as property, plant and equipment in our interim consolidated financial statements are dependent on our ability to continue to generate positive cash flows from operations and to continue to fund general administrative, and exploration activities that would lead to additional profitable mining and processing activities or to generate proceeds from the disposition of property, plant and equipment. ​ The ability of the Company to maintain a positive cash balance for a period of twelve months beyond the filing date of this 2023 Annual Report on Form 10-K is dependent upon its ability to generate sufficient cash flow from selling assets, collecting VAT accounts receivable from the Mexican government, reduce expenses, and raise sufficient funds through equity or external sources. These material uncertainties cast significant doubt on the Company’s ability to continue as a going concern. Therefore, the Company cannot conclude that substantial doubt does not exist as to the Company’s ability to continue as a going concern for the twelve months following the filing date of this Annual Report for the year ended December 31, 2023 on Form 10-K. The financial statements do not include any adjustments relating to the recoverability and classification of recorded assets or liabilities which might be necessary should the Company not continue as a going concern.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2023
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	3. Summary of Significant Accounting Policies ​ The Company’s consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of the Company’s consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to mineral resources and related future metals prices that are the basis for future cash flow estimates utilized in impairment calculations; depreciation, depletion and amortization calculations; environmental reclamation and closure obligations; valuation allowances for deferred tax assets; and the fair value of financial instruments. The Company based its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ significantly from these estimates under different assumptions or conditions. ​ The policies adopted, considered by management to be significant, are summarized as follows: ​ a. Basis of Consolidation ​ All of the Company’s consolidated subsidiaries are 100% owned and as such the Company does not have a noncontrolling interest in any of its subsidiaries. All intercompany transactions and balances have been eliminated at consolidation. ​ b. Translation of Foreign Currencies ​ The Company’s revenue and external funding are primarily denominated in U.S. dollars. Substantially all of the Company’s significant expenditures are made with reference to U.S. dollars. Accordingly, the Company and its subsidiaries use the U.S. dollar as their functional and reporting currency. ​ c. Cash and Cash Equivalents ​ The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. ​ d. Inventories ​ Finished goods inventories include doré bars. Doré bars are valued at the lower of the average cost incurred prior to the refining process, plus applicable refining costs, or net realizable value. ​ In-process inventories represent material that is currently in the process of being converted to a saleable product. In-process material is measured based on assays of the material fed into the process and the projected recoveries of the respective processing plants. In-process inventories are valued at the lower of the average cost, plus the in-process conversion costs, or net realizable value. ​ Stockpiles represent ore that has been extracted from the mine and is available for further processing. Costs are added to stockpiles based on current mining costs. Stockpiles are recorded at the lower of average cost or net realizable value, and carrying values are evaluated at least quarterly. Net realizable value represents the estimated future sales price based on short-term and long-term metals price assumptions, less estimated costs to complete production and bring the product to sale. ​ Materials and supplies inventories are valued at the lower of average cost or net realizable value. Cost includes applicable taxes and freight. The Company routinely counts and evaluates its material and supplies to determine the existence of any obsolete stock that is subject to impairment. ​ e. Mining Properties, Exploration and Development Costs ​ The Company expenses general prospecting costs and the costs of acquiring and exploring unevaluated mining properties. When and if a mining property is determined to have proven and probable mineral reserves, subsequent development costs will be capitalized to mineral properties. For acquired mining properties with proven and probable mineral reserves, the Company will capitalize acquisition costs and subsequent development costs. When and if mining properties with proven and probable reserves are developed and operations commence, capitalized costs will be charged to operations using the units-of-production method over proven and probable reserves. Upon abandonment or sale of a mining property, all capitalized costs relating to the specific property are written off in the period abandoned or sold and a gain or loss is recognized in the accompanying Consolidated Statements of Operations. ​ As discussed in Note 1, the Company is considered an exploration stage company under the criteria set forth by the SEC since it has not yet demonstrated the existence of mineral reserves at any of the Company’s properties. As the Company does not have proven and probable mineral reserves, substantially all expenditures at the Company’s Rodeo Property and the Velardeña Properties for mine construction activity, as well as operating costs associated with the mill facilities, and for items that do not have a readily identifiable market value apart from the mineral resources, have been expensed as incurred. Such costs are charged to cost of metals sold or project expense during the period depending on the nature of the costs. Certain costs may be reflected in inventories prior to the sale of the product. ​ On a quarterly basis the Company evaluates its exploration properties to determine if they meet the Company’s minimum requirements for continued evaluation. The rights to the properties that do not meet the minimum requirements are relinquished and the carrying values, if any, are written off and reflected in “Exploration expense” ​ f. Property, Plant and Equipment and Long-Lived Asset Impairment ​ Buildings are depreciated using the straight–line method over the estimated useful lives of the buildings, typically 30 to 40 years, or the estimated life of the mine, whichever is shorter. Mining equipment and machinery, excluding the plant, are depreciated using the straight-line method over useful lives of three three ​ As discussed above, the Company does not have any properties with proven or probable mineral reserves. ​ Property, plant and equipment are recorded at cost and per the guidance of ASC 360 the Company assesses the recoverability of its property, plant and equipment, whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. If the sum of estimated future net cash flows on an undiscounted basis is less than the carrying amount of the related asset, impairment is considered to exist. The related impairment loss is measured by comparing estimated future net cash flows on a discounted basis or by comparing other market indicators to the carrying amount of the asset. ​ The Company evaluated its remaining long-lived assets at December 31, 2023 and 2022, and determined that no impairment was incurred. ​ g. Asset Retirement Obligations ​ The Company records asset retirement obligations (“ARO”) in accordance with ASC 410, “Asset Retirement and Environmental Obligations” (“ASC 410”), which establishes a uniform methodology for accounting for estimated reclamation and abandonment costs. According to ASC 410, the fair value of an ARO is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. An offsetting asset retirement cost (“ARC”) is capitalized as part of the carrying value of the assets with which it is associated and depreciated over the useful life of the asset (see Note 12). ​ The Company prepares estimates of the timing and amount of expected cash flows when an ARO is incurred. The fair value of the ARO is measured by discounting the expected cash flows using a discount rate that reflects the credit adjusted risk-free rate of interest. The Company records the fair value of an ARO when it is incurred and layer adjustments of the ARO are recorded as an adjustment to the corresponding ARC. The ARO is adjusted to reflect the passage of time (accretion cost) calculated by applying the discount rate implicit in the initial fair value measurement to the beginning-of-period carrying amount of the ARO. The Company records accretion costs to expense as incurred. ​ h. Value Added Taxes ​ The Company pays value added tax (“VAT”) in Mexico as well as other countries, primarily related to the Rodeo operation and exploration projects. For exploration projects, the amounts paid are generally charged to expense as incurred because of the uncertainty of recoverability. For the Rodeo operation, the Company records VAT paid as a recoverable asset, which appears in “Value added tax receivable, net ​ i. Revenue Recognition ​ The Company recognizes revenue from the “Sale of Metals ​ j. Stock-Based Compensation ​ The Company records stock-based compensation awards at fair value on the date of the grant and expenses the awards in the Consolidated Statements of Operations over the requisite employee service period on a straight-line basis (see Note 16). The fair value of the awards is based on the Company’s stock price on the date of the grant. The Company recognizes forfeitures as they occur. ​ k. Leases ​ Effective January 1, 2019 the Company adopted ASU 2016-02 and ASU No. 2018-11, which requires lessees to recognize a right-of-use asset and a lease liability for all leases with terms greater than twelve months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ​ l. Net Income (Loss) per Share of Common Stock ​ Basic income (loss) per share is computed by dividing net income (loss) available to holders of the Company’s Common Stock by the weighted average number of shares of Common Stock outstanding for the period. Diluted income (loss) per share reflects the potential dilution that would occur if securities or other contracts to issue Common Stock were exercised or converted into Common Stock. ​ At December 31, 2023 and 2022, all potentially dilutive shares relating to warrants and stock compensation awards were excluded from the computation of diluted earnings per share because to include them would have been anti-dilutive. ​ m. Income Taxes ​ The Company accounts for income taxes in accordance with the provisions of ASC 740, “Income Taxes” (“ASC 740”), on a tax jurisdictional basis. The Company files United States and certain other foreign country income tax returns, and pays taxes reasonably determined to be due. The tax rules and regulations in these countries are highly complex and subject to interpretation. The Company’s income tax returns are subject to examination by the relevant taxing authorities and in connection with such examinations, disputes can arise with the taxing authorities over the interpretation or application of certain tax rules within the country involved. In accordance with ASC 740, the Company identifies and evaluates uncertain tax positions, and recognizes the impact of uncertain tax positions for which there is a less than more-likely-than-not probability of the position being upheld when reviewed by the relevant taxing authority. Such positions are deemed to be unrecognized tax benefits and a corresponding liability is established on the balance sheet. ​ The Company classifies income tax related interest and penalties as income tax expense. ​ n. Recently Issued Pronouncements ​ In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The new standard requires enhanced disclosures about significant segment expenses and other segment items and interim disclosure of items that were previously required on an annual basis. ASU 2023-07 is to be applied on a retrospective basis and is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the impact of adopting ASU 2023-07 on our consolidated financial statements. ​ In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update are intended to enhance the transparency and decision usefulness of income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update is effective for annual periods beginning after December 15, 2024. Early adoption is permitted and should be applied on a prospective basis, however retrospective application is permitted. We are currently evaluating the impact of adopting ASU 2023-09 on our consolidated financial statements.

Correction of Immaterial Error

Correction of Immaterial Error	12 Months Ended
	Dec. 31, 2023
Correction of Immaterial Error
Correction of Immaterial Error	4. Correction of Immaterial Error ​ In the first quarter of 2022, the Company became aware that at December 31, 2021, it had failed to properly record a royalty tax payable in Mexico related to its Rodeo operations. The effect of correcting this error was to reduce beginning retained earnings by $93,000 at January 1, 2022, as reflected in the accompanying Consolidated Statements of Changes in Equity. ​ The Company evaluated the materiality of the error described above from a qualitative and quantitative perspective. Based on such evaluation, the Company concluded that while the accumulation of the error was significant to the three months ended March 31, 2022, the correction would not be material to results of operations for the period ended December 31, 2021, nor did it have an effect on the trend of financial results, taking into account the requirements of SEC Staff Accounting Bulletin No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements (“SAB 108”). Accordingly, the error was corrected for the December 31, 2021, Consolidated Balance Sheet and reflected in the accompanying Consolidated Statements of Changes in Equity.

Cash and Cash Equivalents and S

Cash and Cash Equivalents and Short-Term Investments	12 Months Ended
	Dec. 31, 2023
Cash and Cash Equivalents and Short-Term Investments
Cash and Cash Equivalents and Short-Term Investments	5. Cash and Cash Equivalents and Short-Term Investments ​ Cash and Cash Equivalents ​ Of the $3.8 million reported as “ Cash and cash equivalents ​ The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. ​ Short-Term Investments ​ Short-term investments include investments with maturities greater than three months, but not exceeding 12 months, or highly liquid investments with maturities greater than 12 months that the Company intends to liquidate during the next 12 months for working capital needs. ​ The following tables summarize the Company's short-term investments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Estimated Carrying December 31, 2023 ​ Cost ​ Fair Value ​ Value ​ ​ ​ (in ​ Short-term investments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 59 ​ $ 11 ​ $ 11 ​ Total trading securities ​ 59 ​ 11 ​ 11 ​ Total short-term investments ​ $ 59 ​ $ 11 ​ $ 11 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 59 ​ $ 20 ​ $ 20 ​ Total trading securities ​ 59 ​ 20 ​ 20 ​ Total short-term investments ​ $ 59 ​ $ 20 ​ $ 20 ​ ​ Investment in Fabled ​ The short-term investments at December 31, 2023 and 2022 consist of 200,000 common shares of Fabled Silver Gold Corp. (“Fabled”) and 20,000 common shares of Fabled Copper Corp. Fabled is a junior mining company that entered into an option agreement with the Company to acquire the Company’s option to earn a 100% interest in the Santa Maria mining claims located in Chihuahua, Mexico (see Note 9). The common shares were issued to the Company as partial consideration per the terms of the option agreement. The Fabled Copper Corp. shares were received in a spin-off of assets from Fabled that occurred on December 21, 2020, to which all existing shareholders of Fabled were entitled. ​ Long-Term Investments ​ Investments in equity securities are generally measured at fair value. Gains and losses for equity securities resulting from changes in fair value are recognized in current earnings. If an equity security does not have a readily determinable fair value, the Company may elect to measure the security at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for an identical or similar investment in the same issuer. At the end of each reporting period, the Company reassesses whether an equity investment security without a readily determinable fair value qualifies to be measured at cost less impairment, considers whether impairment indicators exist to evaluate if an equity investment security is impaired and, if so, records an impairment loss. ​ Investment in Golden Gryphon Explorations Inc. ​ Long-term investments at December 31, 2023 consist of approximately 1,650,880 shares of Golden Gryphon Explorations Inc. (“GGE”). In 2019, the Company entered into an earn-in agreement with GGE for the Sand Canyon project located in northwestern Nevada. In August 2022, pursuant to the second amendment to the earn-in agreement by which the earn-in period was extended an additional year, the Company purchased approximately 1.5 million shares of GGE’s common stock for an aggregate purchase price of $225,000. On August 29, 2023, the Company purchased an additional 150,880 shares of GGE’s common stock for an aggregate purchase price of $40,000. ​ For a description of the earn-in agreement with GGE, see “Exploration Properties — Sand Canyon” in Item 1 of our 2023 Annual Report. ​ The GGE investment is accounted for at cost less impairment pursuant to ASC topic 321 as there is no ready market for the shares and it is recorded as non-current investments on the Consolidated Balance Sheets. The Company concluded it was impractical to estimate fair value due to the absence of a public market for the stock. The Company identified no events or changes in circumstances that might have had a significant adverse effect on the carrying value of the investment and have therefore not recorded any impairment against the asset. ​ Credit Risk ​ The Company invests substantially all of its excess cash with high credit-quality financial institutions or in U.S. government or debt securities. Credit risk is the risk that a third party might fail to fulfill its performance obligations under the terms of a financial instrument. For cash and equivalents and investments, credit risk represents the carrying amount on the balance sheet. The Company mitigates credit risk for cash and equivalents and investments by placing its funds and investments with high credit-quality financial institutions, limiting the amount of exposure to each of the financial institutions, monitoring the financial condition of the financial institutions and investing only in government and corporate securities rated “investment grade” or better. The Company invests with financial institutions that maintain a net worth of no less than $1 billion and are members in good standing with the Securities Investor Protection Corporation.

Prepaid Expenses and Other Asse

Prepaid Expenses and Other Assets	12 Months Ended
	Dec. 31, 2023
Prepaid Expenses and Other Assets
Prepaid Expenses and Other Assets	6. Prepaid Expenses and Other Assets ​ Prepaid expenses and other assets consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 31, ​ ​ 2023 2022 ​ ​ ​ (in thousands) Prepaid insurance ​ $ 319 ​ $ 488 ​ Current portion of deferred offering costs ​ ​ — ​ ​ 45 ​ Recoupable deposits and other ​ 653 ​ 609 ​ ​ ​ $ 972 ​ $ 1,142 ​ ​ The current portion of deferred offering costs is associated with the ATM Agreement (see Note 16). ​ Recoupable deposits and other at December 31, 2023 and 2022 includes a receivable from Barrick for reimbursement of costs of approximately $27,000 and $196,000, respectively, related to the Earn-in Agreement (see Note 9).

Inventories, Net

Inventories, Net	12 Months Ended
	Dec. 31, 2023
Inventories
Inventories, Net	7. Inventories, Net ​ Inventories at the Velardeña Properties were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 2022 ​ ​ (in thousands) ​ Doré inventory ​ $ 248 ​ $ 230 ​ In-process inventory ​ 31 ​ 572 ​ Material and supplies, net ​ ​ 551 ​ ​ 569 ​ ​ ​ $ 830 ​ $ 1,371 ​ ​ Finished goods and in-process inventories, recorded at book value, include approximately $21,000 and $28,000 of capitalized depreciation and amortization at December 31, 2023 and 2022, respectively. Finished goods inventory at December 31, 2023 consists of 173 payable ounces of gold and 1,383 payable ounces of silver in concentrate. Finished goods inventory at December 31, 2022 consists of 157 payable ounces of gold and 652 payable ounces of silver in Doré. ​ The materials and supplies inventories are primarily related to the Velardeña and Rodeo operations and are reduced by a $314,000 and $302,000 obsolescence reserve at each of December 31, 2023 and 2022.

Value Added Tax Receivable, Net

Value Added Tax Receivable, Net	12 Months Ended
	Dec. 31, 2023
Value Added Tax Receivable, Net
Value Added Tax Receivable, Net	8. Value Added Tax Receivable, Net ​ At December 31, 2023 and 2022, the Company recorded a net VAT paid in Mexico of $3.1 million and $1.5 million, respectively, related to the Velardeña Properties and the Rodeo operation, as a recoverable asset, which appears in “ Value added tax receivable, net ​ The Company has also paid VAT in Mexico as well as other countries, primarily related to exploration projects, which has been charged to expense as incurred because of the uncertainty of recoverability (see Note 24). 8.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net	9. Property, Plant and Equipment, Net ​ The components of property, plant and equipment, net are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2023 2022 ​ ​ (in thousands) Mineral properties ​ $ 9,353 ​ $ 9,353 ​ Exploration properties ​ ​ 2,418 ​ ​ 2,418 ​ Royalty properties ​ 200 ​ 200 ​ Buildings ​ 3,672 ​ 3,808 ​ Mining equipment and machinery ​ 14,908 ​ 17,127 ​ Other furniture and equipment ​ 1,378 ​ 1,355 ​ Asset retirement cost ​ 1,158 ​ 1,157 ​ ​ ​ 33,087 ​ 35,418 ​ Less: Accumulated depreciation and amortization ​ (27,266) ​ (29,002) ​ ​ ​ $ 5,821 ​ $ 6,416 ​ ​ For the twelve months ended December 31, 2023 and 2022, the Company recognized approximately $530,000 and $369,000, respectively, of depreciation and amortization expense. ​ El Quevar Earn-In Agreement ​ On April 9, 2020, we entered into an earn-in agreement with Barrick (the “Earn-In Agreement”), pursuant to which Barrick has acquired an option to earn a 70% interest in the Company’s El Quevar project located in the Salta Province of Argentina. As of December 31, 2023, Barrick had met the $1 million in work expenditures that would permit them to withdraw from the Earn-in Agreement. At December 31, 2023, Barrick has continued with exploration activities at El Quevar, per the terms of the Earn-in Agreement. ​ Sale of Santa Maria Property ​ On December 4, 2020, the Company and Fabled entered into an option agreement (the “Option Agreement”) under which Fabled would have acquired a 100% interest in the Santa Maria property by paying $4.5 million in cash over a period of several years. The Company recorded a $1.5 million payment it received from Fabled in December 2021 to “ Deferred revenue On December 19, 2022, the Option Agreement was amended to reschedule the remaining $2.0 million payment into eight quarterly payments of $250,000 from January 31, 2023 through September 30, 2024. Fabled failed to make the payment due on January 31, 2023. In February 2023, the Company issued a notice of default under the Option Agreement to Fabled and the property has reverted to the Company as allowed under the terms of the Agreement. ​ On December 1, 2023, the Company completed the sale of the Company’s 100% interest in the Santa Maria mining claims located in Chihuahua State, Mexico to Transformaciones y Servicios Metalurgicos S.A. DE C.V. (“TSM”) pursuant to the Contract of Assignment of Mining Rights, dated as of December 1, 2023. In connection with the Sale, the Company received $1.5 million in cash and $0.24 million in Value-Added Tax (“VAT”). Furthermore, TSM (i) granted the Company a 1.5% net smelter return (“NSR”) royalty on the Santa Maria concession up to a cap of $1.0 million and (ii) may purchase from the Company the right to receive the NSR royalty for $500,000 at any time prior to the commencement of commercial production on the Santa Maria property by TSM. The carrying value of Santa Maria on December 31, 2022, is zero.

Right-of-Use Assets

Right-of-Use Assets	12 Months Ended
	Dec. 31, 2023
Right-of-Use Assets
Right-of-Use Assets	10. Right-of-Use Assets ​ We are party to contracts where we lease office space from others under contracts classified as operating leases. ​ The Company took possession of new office space and began a new long-term lease for its principal headquarters office with an effective commencement date of June 1, 2019. The new office lease will expire five years and eight ​ In November 2019, the Company renewed its Mexican office lease for four years and recorded a right of use asset and lease liability of approximately $174,000. In December 2021, the Company also renewed its Argentina office lease for three years and recorded a right of use asset and lease liability ​ In December 2020, the Company’s wholly owned subsidiary, Minera de Cordilleras S. de R.L. de C.V., entered into an agreement with Triturados del Guadiana, S.A. de C.V. (“Trigusa”), whereby Trigusa has carried out mining activities at the Rodeo Property. Per the terms of the mining agreement, Trigusa provided services for the 27-month lease liability ​ Operating lease liabilities are included in “ Other liabilities,

Accounts Payable and Other Accr

Accounts Payable and Other Accrued Liabilities	12 Months Ended
	Dec. 31, 2023
Accounts Payable and Other Accrued Liabilities
Accounts Payable and Other Accrued Liabilities	11. Accounts Payable and Other Accrued Liabilities ​ The Company’s accounts payable and other accrued liabilities consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ ​ 2023 ​ 2022 ​ ​ (in thousands) Accounts payable and accruals ​ $ 3,586 ​ $ 2,206 ​ Accrued employee compensation and benefits ​ ​ 1,281 ​ ​ 1,478 ​ Income taxes payable (Note 15) ​ 32 ​ 25 ​ ​ ​ $ 4,899 ​ $ 3,709 ​ ​ December 31, 2023 ​ Accounts payable and accruals at December 31, 2023, are primarily related to amounts due to contractors and suppliers in the amounts of $2.5 million related to the Company’s Velardeña Properties and the Rodeo Property and $1.1 million related to corporate administrative and exploration activities. ​ Accrued employee compensation and benefits at December 31, 2023, consist of $0.4 million of accrued vacation payable and $0.9 million related to salaries, withholding taxes and benefits payable. Included in the $1.3 million of accrued employee compensation and benefits is $1.1 million related to activities at the Velardeña Properties and the Rodeo Property. ​ December 31, 2022 ​ Accounts payable and accruals at December 31, 2022, are primarily related to amounts due to contractors and suppliers in the amounts of $1.8 million related to the Company’s Velardeña Properties and the Rodeo Property and $0.4 million related to corporate administrative and exploration activities. ​ Accrued employee compensation and benefits at December 31, 2022 consist of $0.4 million of accrued vacation payable and $1.1 million related to salaries, withholding taxes and benefits payable. Included in the $1.5 million of accrued employee compensation and benefits is $1.2 million related to activities at the Velardeña Properties and the Rodeo Property. ​ Mexican Subsidiaries Profit-Sharing Liability ​ On April 23, 2021, a new labor law was made official in Mexico that impacts companies that utilize subcontractor structures, effective beginning August 1, 2021. The Company utilizes subcontractor structures in Mexico, as is common practice among companies in the mining industry in Mexico. The law disallows a deduction in computing income taxes for labor outsourcing costs unless the arrangement falls within certain narrowly defined exceptions. The new law does provide for annual caps on the amount of employee profit sharing a company would be required to pay, which is designed to even out the profit-sharing liability over several years. During 2021, the Company reorganized the functions performed by its various Mexican subsidiaries to comply with the new law. The Company’s profit-sharing liability in Mexico has increased as a result of the new law taking effect. The profit-sharing liability is included in “ Accrued employee compensation and benefits ​ Income taxes payable are related to operations at the Company’s Mexican subsidiaries (see Note 15).

Asset Retirement and Reclamatio

Asset Retirement and Reclamation Liabilities	12 Months Ended
	Dec. 31, 2023
Asset Retirement and Reclamation Liabilities
Asset Retirement and Reclamation Liabilities	12. Asset Retirement and Reclamation Liabilities ​ In 2012, the Company retained the services of a mining engineering firm to prepare a detailed closure plan for reclamation activity at the Velardeña Properties. The plan was completed during the second quarter of 2012 and indicated that the Company had an ARO and offsetting ARC of approximately $1.9 million. The original ARC had been fully amortized or written off by the end of December 31, 2015. The ARO has been adjusted since 2012 for changes in assumptions related to inflation factors and the timing of future expenditures used in the determination of future cash flows, which previously contemplated that reclamation activities could begin as early as 2023 following the completion of mining at the Rodeo Property. ​ In the fourth quarter of 2021, due to the operating success at Rodeo and the potential of a restart of operations at the Velardeña mine based on recent technical studies at the time and an updated preliminary economic assessment (“PEA”) that would further delay the start of any reclamation activity, the Company retained the services of an environmental consultant to review the closure plan to determine the appropriateness of the scope and cost estimates used in the calculation of the ARO. The consultant confirmed the adequacy of the scope of the closure plan and provided certain adjustments to cost estimates. In addition, the timing for the incurrence of reclamation activity was extended approximately seven years to 2030 to take into account the likelihood of a restart of operations at the Velardeña mine that would further delay the start of any reclamation activity. ​ In late 2022, the Company determined that the restart of the Velardeña Properties would be deferred one year, which would in turn defer the beginning of the reclamation activity assumption by one year to 2031. Subsequent to December 31, 2023, the Company suspended operations at the Velardeña Properties. The Company is evaluating its options for the Velardeña Properties, including possible sale, which could significantly offset the timing of the start of reclamation activity and hence the cost estimates. ​ The Company will continue to accrue additional estimated ARO amounts based on the closure plan and as activities requiring future reclamation and remediation occur. ​ Asset retirement and reclamation liabilities consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Current asset retirement and reclamation liabilities ​ $ 150 ​ $ — Non-current asset retirement and reclamation liabilities ​ 4,096 ​ 3,993 ​ ​ $ 4,246 ​ $ 3,993 ​ Current asset retirement and reclamation liabilities are included in “ Other Current Liabilities ​ The following table presents the changes in the Company’s asset retirement and reclamation liabilities for the twelve months ended December 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Balance at January 1, ​ $ 3,993 ​ $ 3,569 Changes in estimates, and other ​ (44) ​ 142 Accretion expense ​ 297 ​ 282 Balance at December 31, ​ $ 4,246 ​ $ 3,993 ​ The change in estimate of the ARO recorded during the year ended December 31, 2023 and 2022 is due to a combination of changes in assumptions related to the timing of future expenditures, the change in inflation assumptions, and the change in the discount rate. ​ Accretion expense in the table noted above for each of the years ended December 31, 2023 and 2022 has been recorded as “Reclamation expense” “Other operating expense, net” “Other operating income, net”

Other Liabilities

Other Liabilities	12 Months Ended
	Dec. 31, 2023
Other Liabilities
Other Liabilities	13. Other Liabilities ​ Other Current Liabilities ​ The following table sets forth the Company’s other current liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 ​ 2022 ​ ​ (in thousands) Premium financing ​ $ 269 ​ $ 406 Operating lease liability ​ 105 ​ 164 Mining equipment lease liability ​ ​ — ​ ​ 70 Litigation contingency accrual ​ ​ 250 ​ ​ — Current asset retirement and reclamation liabilities ​ ​ 150 ​ ​ — ​ ​ $ 774 ​ $ 640 ​ The premium financing at December 31, 2023 consists of the remaining balance, plus accrued interest, related to premiums payable for the Company’s directors and officers insurance and general liability insurance. In May 2023, the Company financed approximately $148,000 of its insurance premium. The premium is payable in eleven equal payments at an interest rate of 8.3% per annum. In November 2023, the Company financed approximately $276,000 of its insurance premium. The premium is payable in eleven equal payments at an interest rate of 8.5% per annum. At December 31, 2023, the total remaining balance of the premium financing, plus accrued interest in other current liabilities, was approximately $269,000. ​ The premium financing at December 31, 2022 consists of the remaining balance, plus accrued interest, related to premiums payable for the Company’s directors and officers insurance and general liability insurance. In November 2022, the Company financed approximately $445,000 of its insurance premium. The premium is payable in eleven equal payments at an interest rate of 7.0% per annum. At December 31, 2022, the remaining balance, plus accrued interest, was approximately $406,000. ​ The operating lease liability is related to lease liabilities for office space at the Company’s principal headquarters in Golden, Colorado and in Mexico and Argentina (see Note 10). ​ The mining equipment lease liability is related to equipment used by the contract miner at our Rodeo Property (see Note 10). ​ The litigation contingency accrual is related to the Unifin lawsuit (see Note 20). ​ The current asset retirement and reclamation liabilities are related to the ARO (see Note 12). ​ Other Long-Term Liabilities ​ The following table sets forth the Company’s other long-term liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 ​ 2022 ​ ​ (in thousands) Operating lease liability ​ $ 10 ​ $ 107 Deposits and other ​ ​ 18 ​ ​ 15 ​ ​ $ 28 ​ $ 122 ​ The operating lease liability is related to lease liabilities for office space at the Company’s principal headquarters in Golden, Colorado and in Mexico and Argentina (see Note 10). Deposits and other is primarily related to an escrow deposit from Minera Indé per our administrative services agreement (see Note 23).

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2023
Fair Value Measurements
Fair Value Measurements	14. Fair Value Measurements ​ Financial assets and liabilities and nonfinancial assets and liabilities are measured at fair value on a recurring basis under a framework of a fair value hierarchy which prioritizes the inputs into valuation techniques used to measure fair value into three broad levels. This hierarchy gives the highest priority to quoted prices (unadjusted) in active markets and the lowest priority to unobservable inputs. Further, financial assets and liabilities should be classified by level in their entirety based upon the lowest level of input that was significant to the fair value measurement. The three levels of the fair value hierarchy per ASC Topic 820 are as follows: ​ Level 1: ​ Level 2: ​ Level 3: ​ The following table summarizes the Company’s financial assets and liabilities measured on a recurring basis at fair value by respective level of the fair value hierarchy: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total ​ ​ (in thousands) At December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 3,766 ​ $ — ​ $ — ​ $ 3,766 ​ Short-term investments ​ 11 ​ — ​ — ​ 11 ​ ​ ​ $ 3,777 ​ $ — ​ $ — ​ $ 3,777 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 3,972 ​ $ — ​ $ — ​ $ 3,972 ​ Short-term investments ​ 20 ​ — ​ — ​ 20 ​ ​ ​ $ 3,992 ​ $ — ​ $ — ​ $ 3,992 ​ ​ The Company’s cash equivalents, comprised principally of U.S. treasury securities, are classified within Level 1 of the fair value hierarchy. ​ The Company’s short-term investments consist of the 200,000 shares of common stock of Fabled and 20,000 shares of Fabled Copper Corp. and are classified within Level 1 of the fair value hierarchy (see Note 5). ​ ​ Non-recurring Fair Value Measurements ​ The Company recorded a change in estimate to its ARO as of December 31, 2023, of approximately $44,000 (see Note 12), reflecting a change in the fair value of the ARO primarily as the result of changes in assumptions related to the amount and timing of future expenditures used in the determination of future cash flows, the change in inflation assumptions, and the change in the discount rate, following the guidance of ASC Topic 410. The fair value analysis was performed internally by the Company. The valuation falls within Level 3 of the fair value hierarchy. ​ No other non-recurring fair value adjustments to liabilities or long-lived assets were recorded during the years ended December 31, 2023 and 2022.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2023
Income Taxes
Income Taxes	15. Income Taxes ​ The Company accounts for income taxes in accordance with the provisions of ASC 740 on a tax jurisdictional basis. The provision for income taxes consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended December 31, ​ ​ 2023 ​ 2022 CURRENT TAXES: ​ (in thousands) United States ​ $ — ​ $ — Other Countries ​ 11 ​ 107 ​ ​ $ 11 ​ $ 107 DEFERRED TAXES: ​ ​ ​ ​ ​ ​ United States ​ $ — ​ $ — Other Countries ​ — ​ (19) ​ ​ $ — ​ $ (19) Total income tax provision ​ $ 11 ​ $ 88 ​ Income (loss) from operations before income taxes by country consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended December 31, ​ ​ 2023 2022 ​ ​ (in thousands) United States ​ $ (7,809) ​ $ (10,151) ​ Other Countries ​ (1,408) ​ 333 ​ ​ ​ $ (9,217) ​ $ (9,818) ​ ​ The Company recorded $11,000 of current tax expense and zero of deferred tax benefit for the year ended December 31, 2023, the taxable income of certain subsidiaries in Mexico related to the Rodeo operation. The Company recorded $107,000 of current tax expense and $19,000 deferred tax benefit for the year ended December 31, 2022, the taxable income of certain subsidiaries in Mexico related to the Rodeo operation. ​ A reconciliation of the provision for income taxes computed at the statutory rate to the provision for income taxes as shown in the Consolidated Statements of Operations is summarized below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Tax expense (benefit) at U.S. rate of 21% ​ $ (1,936) ​ $ (2,062) ​ Other adjustments: ​ ​ ​ ​ ​ ​ ​ Rate differential of other jurisdictions ​ (342) ​ (387) ​ Effects of foreign earnings ​ (2,103) ​ (1,631) ​ Change in valuation allowance ​ (2,737) ​ (3,619) ​ Provision to tax return true-ups ​ ​ 557 ​ ​ 113 ​ Exchange rate changes on deferred tax assets ​ ​ (4,744) ​ ​ 3,234 ​ Expired net operating losses ​ ​ 11,186 ​ ​ 4,099 ​ Other ​ 130 ​ 341 ​ Income tax provision ​ $ 11 ​ $ 88 ​ ​ The components of the deferred tax assets and deferred tax liabilities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended ​ ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Net operating loss carryforwards ​ $ 104,956 ​ $ 109,397 ​ Capital loss carry forwards ​ 1,702 ​ 1,702 ​ Reclamation Costs ​ ​ 1,226 ​ ​ 1,184 ​ Stock-based compensation ​ 790 ​ 868 ​ Property, plant and equipment ​ 2,121 ​ 2,428 ​ Other ​ 1,639 ​ 2,296 ​ ​ ​ 112,434 ​ 117,875 ​ Less: Valuation allowance ​ (111,250) ​ (113,987) ​ Total deferred tax assets ​ 1,184 ​ 3,888 ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Property, plant and equipment ​ (1,023) ​ (3,831) ​ Other ​ (161) ​ (57) ​ Total deferred tax liabilities ​ (1,184) ​ (3,888) ​ Net deferred tax asset (liability) ​ $ — ​ $ — ​ ​ In accordance with ASC 740, the Company presents deferred tax assets net of its deferred tax liabilities on a tax jurisdictional basis on its Consolidated Balance Sheets. The net deferred tax liability as of December 31, 2023 was zero. The net deferred tax liability as of December 31, 2022 was zero. ​ At December 31, 2023 the Company had net operating loss carryforwards in the U.S. and in certain non-U.S. jurisdictions totaling $418.5 million. In the U.S. there are $100.7 million of net operating loss carryforwards, $30.2 million of which have no expiration, while the remaining losses will expire in future years through 2038. In the remaining non-U.S. countries, there are $45.8 million of net operating loss carryforwards related to the Rodeo operation and Velardeña Properties in Mexico, which will expire in future years through 2031, $89.4 million in Spain, which have no expiration date, and $182.5 million in other non-U.S. countries (including Luxemburg, Peru, Argentina and Canada), which will expire in future years through 2042. ​ The valuation allowance offsetting the net deferred tax assets of the Company of $111.3 million and $114.0 million at December 31, 2023 and 2022, respectively, relates primarily to the uncertain utilization of certain deferred tax assets, primarily net operating loss carryforwards, in various tax jurisdictions. The Company continually assesses both positive and negative evidence to determine whether it is more likely than not that deferred tax assets can be realized prior to their expiration. ​ The Company, a Delaware corporation, and its subsidiaries file tax returns in the United States and in various foreign jurisdictions. The tax rules and regulations in these countries are highly complex and subject to interpretation. The Company’s tax returns are subject to examination by the relevant taxing authorities and in connection with such examinations, disputes can arise with the taxing authorities over the interpretation or application of certain tax rules within the country involved. In accordance with ASC 740, the Company identifies and evaluates uncertain tax positions, and recognizes the impact of uncertain tax positions for which there is less than a more-likely-than-not probability of the position being upheld upon review by the relevant taxing authority. Such positions are deemed to be “unrecognized tax benefits” which require additional disclosure and recognition of a liability within the financial statements. If recognized, none of the unrecognized tax benefits would affect the Company’s effective tax rate. ​ Below is a reconciliation of the beginning and ending amount of gross unrecognized tax benefits, which excludes any estimated penalties and interest on all identified unrecognized tax benefits. The Company had no unrecognized tax benefits at December 31, 2023 and 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Gross unrecognized tax benefits at beginning of period ​ $ — ​ $ — ​ Increases for tax positions taken during prior years ​ — ​ — ​ Decreases relating to settlements with taxing authorities ​ — ​ — ​ Reductions due to lapse of statute of limitations ​ — ​ — ​ Gross unrecognized tax benefits at end of period ​ $ — ​ $ — ​ ​ Tax years as early as 2017 remain open and are subject to examination in the Company’s principal tax jurisdictions. The Company does not expect a significant change to its net unrecognized tax benefits over the next 12 months. No interest and penalties were recognized in the Consolidated Statement of Operations for the year ended December 31, 2023 or 2022, and there were no interest and penalties recognized in the statement of financial position as of December 31, 2023 and 2022. The Company classifies income tax related interest and penalties as income tax expense.

Equity

Equity	12 Months Ended
	Dec. 31, 2023
Equity
Equity	16. Equity ​ On May 26, 2023, the Company’s Board of Directors approved a reverse stock split of the common stock, par value $0.01 per share, of the Company at a ratio of one-for- 25 ​ June 2023 Offering and Private Placement Transaction ​ On June 26, 2023, the Company entered into a Securities Purchase Agreement with certain institutional investors providing for the issuance and sale by the Company in a registered direct offering (the “June 2023 Offering”) of an aggregate of 790,000 shares of the Company’s common stock at a purchase price of $1.45 per share and pre-funded warrants exercisable for up to 637,587 shares of the Company’s common stock (the “June 2023 Pre-Funded Warrants”) at a purchase price of $1.4499 per June 2023 Pre-Funded Warrant. ​ The June 2023 Pre-Funded Warrants were sold, in lieu of shares of the Company’s common stock, to such institutional investors whose purchase of shares of Company’s common stock in the June 2023 Offering would otherwise result in such institutional investors, together with their respective affiliates and certain related parties, beneficially owning more than 9.99% of the Company’s outstanding common stock immediately following the consummation of the June 2023 Offering. Each June 2023 Pre-Funded Warrant represents the right to purchase one share of the Company’s common stock at an exercise price of $0.0001 per share. The June 2023 Pre-Funded Warrants were exercisable immediately and could be exercised at any time until the June 2023 Pre-Funded Warrants are exercised in full. During the quarter ended September 30, 2023, all of the 637,587 June 2023 Pre-Funded Warrants were exercised for net proceeds of $63.76. ​ In a concurrent private placement (the “June 2023 Private Placement” and, together with the June 2023 Offering, the “June 2023 Transactions”), the Company agreed to issue warrants to purchase up to 1,427,587 shares of The Company’s common stock at an exercise price of $1.90 (the “June 2023 Warrants”). Each June 2023 Warrant is exercisable six months five years ​ The net proceeds of the June 2023 Offering were recorded in equity and appear as a separate line item in the Consolidated Statements of Changes in Equity. Total costs for the June 2023 Offering were approximately $215,000, including listing fees, legal and other costs, and the placement agent fee of 6% of aggregate gross proceeds. All such costs were recorded as a reduction to “ Additional paid-in capital ​ November 2023 Public Offering ​ On November 6, 2023, the Company entered into a Securities Purchase Agreement with certain institutional investors providing for the issuance and sale by the Company in a public offering (the “November 2023 Offering”), (i) an aggregate of 4,712,488 shares of the Company’s common stock, par value $0.01 per share (the “Common Shares”), at a public offering price of $0.70 per Common Share (the “Initial Shares”); (ii) Series A common warrants (the “November 2023 Series A Warrants”) to purchase 6,000,000 Common Shares at a public offering price of $0.70 per Common Share; (iii) Series B warrants (the “November 2023 Series B Warrants” and, together with the November 2023 Series A Warrants, the “November 2023 Common Warrants”) to purchase 3,000,000 Common Shares (the “November 2023 Series B Warrant Shares” and, together with the November 2023 Series A Warrant Shares, the “November 2023 Common Warrant Shares”) at a public offering price of $0.70 per Common Share; (iv) pre-funded warrants (the “November 2023 Pre-Funded Warrants” and, together with the November 2023 Common Warrants, the “November 2023 Warrants”) to purchase 1,287,512 Common Shares (the “November 2023 Pre-Funded Warrant Shares” and, together with the November 2023 Common Warrant Shares, the “November 2023 Warrant Shares” and, the November 2023 Warrant Shares together with the Initial Shares, the “November 2023 Offered Shares”); and (v) the November 2023 Warrant Shares, for aggregate gross proceeds from the November 2023 Offering of approximately $4.2 million. ​ The November 2023 Series A Warrants have an exercise price of $0.70 per share, are exercisable immediately and will expire five years after the initial exercise date, and the November 2023 Series B warrants have an exercise price of $0.70 per share, are exercisable immediately and will expire 18 months after the initial exercise date. ​ The November 2023 Pre-Funded Warrants were sold, in lieu of shares of common stock, to such institutional investors whose purchase of shares of common stock in the November 2023 Offering would otherwise result in such institutional investors, together with their respective affiliates and certain related parties, beneficially owning more than 4.99% of the Company’s outstanding common stock immediately following the consummation of the November 2023 Offering. Each November 2023 Pre-Funded Warrant represents the right to purchase one share of common stock at an exercise price of $0.0001 per share. The November 2023 Pre-Funded Warrants are exercisable immediately and may be exercised at any time until the November 2023 Pre-Funded Warrants are exercised in full. During the quarter ended December 31, 2023, 798,940 of the November 2023 Pre-Funded Warrants were exercised for net proceeds of $79.89. ​ The net proceeds of the November 2023 Offering were recorded in equity and appear as a separate line item in the Consolidated Statements of Changes in Equity. Total costs for the November 2023 Offering were approximately $393,000, including listing fees, legal and other costs, and the placement agent fee of 6% of aggregate gross proceeds. All such costs were recorded as a reduction to “ Additional paid-in capital ​ At the Market Offering Agreement ​ In December 2016, the Company entered into an at the market offering agreement (as amended from time to time, the “ATM Agreement”) with H.C. Wainwright & Co., LLC (“Wainwright”), under which the Company may, from time to time, issue and sell shares of the Company’s common stock through Wainwright as sales manager in an at the market offering under a prospectus supplement for aggregate sales proceeds of up to $5.0 million (the “ATM Program”) or a maximum of 10 million shares. On September 29, 2017, the Company entered into an amendment to the ATM Agreement with Wainwright to reflect a new Registration Statement on Form S-3 (File No. 333-220461) under which shares of the Company’s common stock may be sold under the ATM Program. On November 23, 2018, the Company entered into a second amendment of the ATM Agreement extending the agreement until the earlier of December 20, 2020, or the date that the ATM Agreement is terminated in accordance with the terms therein. On December 11, 2020, the Company entered into a third amendment of the ATM Agreement further extending the agreement so that it will remain in full force and effect until such time as the ATM Agreement is terminated in accordance with certain other terms therein or upon mutual agreement by the parties, and to reflect a new Registration Statement on Form S-3 (No. 333-249218). On March 29, 2023, the Company filed a Prospectus Supplement increasing the total amount available to be sold under the ATM to $10.0 million in addition to the amounts previously sold. Subsequent to the reverse stock split, on June 28, 2023, the Company filed another Prospectus Supplement decreasing the total amount available to be sold under the ATM to $3.0 million, not including the amounts previously sold. ​ Under the ATM, the common stock is distributed at the market prices prevailing at the time of sale. As a result, prices of the common stock sold under the ATM Program may vary between purchasers and during the period of distribution. Further, on March 29, 2023, the Company entered into a fourth amendment of the ATM Agreement which provides that Wainwright will be entitled to compensation for its services at a commission rate of up to 3.0% of the gross sales price per share of common stock sold under the ATM Agreement. ​ During the year ended December 31, 2023, the Company sold an aggregate of 308,930 shares of common stock under the ATM Program at an average price of $6.19 per share of common stock for net proceeds, after commissions and fees, of approximately $1,839,000. Approximately $45,000 of deferred ATM Program costs were amortized during the year ended December 31, 2023. The remaining balance of the deferred ATM Program costs, recorded in “ Prepaid expenses and other assets ​ During the year ended December 31, 2022, the Company sold an aggregate of 111,234 shares of common stock under the ATM Program at an average price of $7.03 per share of common stock for net proceeds, after commissions and fees, of approximately $754,000. Approximately $25,000 of deferred ATM Program costs were amortized during the year, and at December 31, 2022, there was a remaining balance of $45,000 of the current portion of deferred ATM Program costs, recorded in “ Prepaid expenses and other assets ​ As of December 31, 2023 the ATM Program was no longer in effect as the 2020 Registration Statement filed on Form S-3 filed with SEC on October 1, 2020 expired on October 1, 2023. ​ Equity Incentive Plans ​ Under the Company’s Amended and Restated 2009 Equity Incentive Plan (the “2009 Plan”) awards of the Company’s common stock may be made to officers, directors, employees, consultants and agents of the Company and its subsidiaries. ​ On May 26, 2023, the stockholders of the Company voted to approve the Company’s 2023 Equity Incentive Plan (the “2023 Plan”) to replace the 2009 Plan. Under the 2023 Plan, awards of the Company’s common stock may be made to officers, directors, employees, consultants and agents of the Company and its subsidiaries. The 2023 Plan provides for, among other things, (i) a reserve of 360,000 shares (on a reverse stock split-adjusted basis) of common stock of the Company that may be issued pursuant to awards under the 2023 Plan and (ii) a term that expires on February 23, 2033. Permitted awards under the 2023 Plan include options, stock appreciation rights, restricted stock, restricted stock units, performance stock units, and other cash and stock-based awards. The principal terms of the 2023 Plan are described in the Company’s definitive proxy statement for the Annual Meeting of the Company’s stockholders, filed with the SEC on April 6, 2023. The Company recognizes stock-based compensation costs using a graded vesting attribution method whereby costs are recognized over the requisite service period for each separately vesting portion of the award. ​ Following the adoption of the 2023 Plan, no further awards may be made under the 2009 Plan. ​ Restricted Stock Grants ​ The following table summarizes the status and activity of the Company’s restricted stock grants at December 31, 2023 and 2022, and the changes during the years then ended: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ ​ 2023 ​ 2022 ​ ​ Weighted ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Grant Date ​ ​ ​ Grant Date ​ ​ Number of ​ Fair Value ​ Number of ​ Fair Value Restricted Stock Grants ​ Shares ​ Per Share ​ Shares ​ Per Share Outstanding at beginning of period ​ 19,800 ​ $ 10.95 ​ 11,733 ​ $ 15.26 ​ Granted during the period — ​ — 22,000 ​ 9.41 ​ Restrictions lifted during the period (12,933) ​ 11.97 (13,933) ​ 12.14 ​ Forfeited during the period (1,067) ​ 9.75 — ​ — ​ Outstanding at end of period ​ 5,800 ​ $ 8.89 ​ 19,800 ​ $ 10.95 ​ ​ During the year ended December 31, 2023, the Company recognized approximately $83,000 of stock compensation expense related to the restricted stock grants. During the year ended December 31, 2023, no restricted stock grants had been made under the 2009 Plan or the 2023 Plan. During the period, restrictions were lifted on the normal vesting of 12,933 shares granted to employees in prior years and 1,067 shares were forfeited due to the resignation of one employee. ​ During the year ended December 31, 2022, the Company recognized approximately $207,000 of stock compensation expense related to the restricted stock grants. During the year ended December 31, 2022, 20,000 shares were granted to nine employees, with one one ​ Restricted Stock Units ​ The 2009 Plan permitted the Company to issue Restricted Stock Units (“RSUs”), which entitle each recipient to receive one unrestricted share of common stock upon termination of the recipient’s employment or board service. Also, pursuant to the 2009 Plan, the Company’s Board of Directors adopted the Non-Employee Director’s Deferred Compensation and Equity Award Plan (the “Deferred Compensation Plan”). Pursuant to the Deferred Compensation Plan, non-employee directors, and employees as allowed by the 2009 Plan, receive a portion of their compensation in the form of RSUs issued under the 2009 Plan. The 2009 Plan RSUs generally vest on the first anniversary of the grant. ​ The 2023 Plan permits the Company to issue RSUs, which entitle each recipient to receive one unrestricted share of common stock upon termination of the recipient’s employment or board service. Under the 2023 Plan, one-half of the shares vest equally on the first and second anniversaries of the grant date. ​ The following table summarizes the status and activity of the Company’s RSUs at December 31, 2023 and 2022, and the changes during the years then ended: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ ​ 2023 ​ 2022 ​ ​ Weighted ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Grant Date ​ ​ ​ Grant Date ​ ​ Number of ​ Fair Value ​ Number of ​ Fair Value ​ Restricted Stock Units ​ Shares ​ Per Share ​ Shares ​ Per Share Outstanding at beginning of period ​ 232,409 ​ $ 15.06 ​ 164,409 ​ $ 17.20 ​ Granted during the period 40,000 ​ 1.62 68,000 ​ 9.90 ​ Restrictions lifted during the period — ​ — — ​ — ​ Forfeited during the period — ​ — — ​ — ​ Outstanding at end of period ​ 272,409 ​ $ 13.09 232,409 ​ $ 15.06 ​ ​ For the twelve months ended December 31, 2023 and 2022, the Company recognized approximately $329,000 and $361,000, respectively, of stock compensation expense related to the RSUs. ​ Key Employee Long-Term Incentive Plan ​ The Company’s 2013 Key Employee Long-Term Incentive Plan (the “KELTIP”) provided for the grant of units (“KELTIP Units”) to certain officers and key employees of the Company, which units will, once vested, entitle such officers and employees to receive an amount, in cash or in Company common stock (such method of settlement at the sole discretion of the Board of Directors) issued pursuant to the Company’s stockholder approved equity incentive plans, measured generally by the price of the Company’s common stock on the settlement date. KELTIP Units are not an actual equity interest in the Company and are solely unfunded and unsecured obligations of the Company that are not transferable and do not provide the holder with any stockholder rights. Payment of the settlement amount of vested KELTIP Units is deferred generally until the earlier of a change of control of the Company or the date the grantee ceases to serve as an officer or employee of the Company. ​ The Company intends to settle all the KELTIP Units in common stock of the Company, an option that the Board of Directors holds in its sole discretion so long as sufficient shares remain available under the Company’s stockholder approved equity incentive plans. As a result, all outstanding KELTIP Units are recorded in equity at December 31, 2023 and 2022. ​ For the twelve months ended December 31, 2023, the Company recognized approximately $7,000 of stock compensation income due to KELTIP Units being forfeited upon departure of an officer of the Company. ​ For the twelve months ended December 31, 2022, the Company recognized approximately $176,000 of stock compensation expense related to the KELTIP grants. Also, during the year ended December 31, 2022, an officer of the Company retired and was issued 44,935 shares of the Company’s common stock net of 18,265 shares relinquished to cover withholding taxes. The shares issued were in settlement of previously granted KELTIP Units. ​ There were 168,000 and 188,000 KELTIP Units outstanding at December 31, 2023 and 2022, respectively. However, under the 2023 Plan, the Company discontinued the KELTIP and will no longer issue KELTIP Units. ​ ​ Common Stock Warrants ​ The following table summarizes the status and activity of the Company’s common stock warrants at December 31, 2023 and 2022, and the changes during the twelve months then ended: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ Number of ​ Average ​ ​ Underlying ​ Exercise Price Common Stock Warrants ​ Shares ​ Per Share Outstanding at December 31, 2021 ​ 512,155 ​ $ 8.62 Exercised during period ​ ​ ​ ​ ​ July 2019 Series B Warrants ​ (120,000) ​ ​ 8.75 Outstanding at December 31, 2022 ​ 392,155 ​ $ 8.58 Granted during period ​ ​ ​ June 2023 Pre-Funded Warrants ​ 637,587 ​ ​ 0.0001 June 2023 Warrants ​ 1,427,587 ​ ​ 1.90 November 2023 Series A Warrants ​ 6,000,000 ​ ​ 0.70 November 2023 Series B Warrants ​ 3,000,000 ​ ​ 0.70 November 2023 Pre-Funded Warrants ​ 1,287,512 ​ ​ 0.0001 Exercised during period ​ ​ ​ ​ ​ June 2023 Pre-Funded Warrants ​ (637,587) ​ ​ 0.0001 November 2023 Pre-Funded Warrants ​ (798,940) ​ ​ 0.0001 Outstanding at December 31, 2023 ​ 11,308,314 ​ $ 1.09 ​ The warrants relate to prior registered offerings and private placements of the Company’s stock. ​ July 2019 Series A Warrants ​ On July 17, 2019, the Company issued 346,155 registered shares of common stock in a registered direct offering. In connection with the offering, each investor received an unregistered Series A warrant to purchase a share of common stock for each share of common stock purchased at an exercise price of $8.75 per share. Each Series A warrant is exercisable six months from the date of issuance and has a term expiring in January 2025. During the year ended December 31, 2021, 8,000 series A warrants were exercised, for net proceeds of $0.1 million, leaving a balance of 338,155 series A warrants outstanding as of December 31, 2023 and 2022. ​ July 2019 Series B Warrants ​ In connection with the July 2019 registered direct offering noted above, the Company also agreed to exchange, on a one-for-one basis, 180,000 of the May 2016 warrants for Series B warrants to purchase 180,000 shares of common stock at an exercise price of $8.75 per share. Each Series B warrant was exercisable six months from the date of issuance and had a term expiring in May 2022. During the year ended December 31, 2021, 60,000 of the series B warrants were exercised, for net proceeds of $0.5 million, leaving a balance of 120,000 series B warrants outstanding. During the year ended December 31, 2022, the remaining balance of 120,000 of the series B warrants were exercised, for net proceeds of $1.1 million. ​ April 2020 Warrants ​ On April 20, 2020, the Company entered into a securities purchase agreement with certain institutional investors providing for the issuance and sale of 600,000 shares of the Company’s common stock and in a concurrent private placement transaction, the issuance of an aggregate of 450,000 warrants, ultimately consisting of 300,000 series A warrants and 150,000 series B warrants. During the year ended December 31, 2020, 200,000 series A warrants and 140,000 Series B warrants were exercised, for net proceeds of $2.6 million, leaving a balance of 100,000 and 10,000 series A and series B warrants outstanding, respectively, as of December 31, 2020. During the year ended December 31, 2021, 56,000 series A warrants were exercised, for net proceeds of $0.4 million, leaving a balance of 44,000 and 10,000 series A and series B warrants outstanding, respectively, as of December 31, 2021. There were no April 2020 Warrants exercised during the years ended December 31, 2022 or 2023. ​ Warrants outstanding as of December 31, 2023 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Number of ​ Exercise ​ ​ Common Stock Warrants ​ Warrants ​ Price ​ Expiration Date July 2019 Series A Warrants 338,155 $ 8.75 January 17, 2025 July 2019 Series B Warrants ​ — ​ $ 8.75 ​ May 6, 2022 April 2020 Series A Warrants ​ 44,000 ​ $ 7.50 ​ October 22, 2025 April 2020 Series B Warrants ​ 10,000 ​ $ 7.50 ​ October 22, 2025 June 2023 Pre-Funded Warrants ​ — ​ $ 0.0001 ​ December 26, 2028 June 2023 Warrants ​ 1,427,587 ​ $ 1.90 ​ December 26, 2028 November 2023 Series A Warrants ​ 6,000,000 ​ $ 0.70 ​ November 6, 2023 November 2023 Series B Warrants ​ 3,000,000 ​ $ 0.70 ​ November 6, 2023 November 2023 Pre-Funded Warrants ​ 488,572 ​ $ 0.0001 ​ Upon exercise ​ ​ 11,308,314 ​ ​ ​ ​ ​ ​ All outstanding warrants are recorded in equity at December 31, 2023 and 2022 following the guidance established by ASC Topic 815-40. The Company’s warrants allow for the potential settlement in cash if certain extraordinary events are affected by the Company, including a 50% or greater change of control in the Company’s common stock. Since those events have been deemed to be within the Company’s control, the Company continues to apply equity treatment for these warrants.

Sale of Metals and Related Cost

Sale of Metals and Related Costs	12 Months Ended
	Dec. 31, 2023
Sale of Metals and Related Costs
Sale of Metals and Related Costs	17. Sale of Metals and Related Costs ​ Revenue from Gold and Silver in Doré ​ During the year ended December 31, 2023, the Company recorded revenue of approximately $9.7 million and related costs of approximately $12.0 million related to gold and silver contained in doré bars related to the Rodeo operation. The gold and silver contained in the doré bars were sold to one customer, a metals refinery located in the United States. Under the terms of the Company’s agreement with its customer, title passes and revenue is recognized by the Company when the contractual performance obligations of the parties are completed, generally at the time a provisional or final payment is made. A provisional payment for approximately 95% of the contained gold and silver is made generally within 10 12 parties. A price for the gold and silver sold is set, based on current market prices, at the time a provisional or final payment is made. Refining and transport costs, deducted from the final payments made, are treated as third-party agent costs incurred by the Company in performing its obligations under the agreement with its customer after the transfer of control on provisional sales and are therefore netted against revenue on an accrual basis. ​ During the year ended December 31, 2022, the Company sold gold and silver contained in doré bars related to the Rodeo operation and recorded revenue of approximately $23.3 million and related costs of approximately $17.5 million. Costs related to the sale of metal products include direct and indirect costs incurred to mine, process and market the products. ​ Revenue from Concentrate Sales ​ In April 2023, the Company began to sell three different concentrates containing various amounts of gold, silver, lead and zinc produced from material processed from the Velardeña mine which had been stockpiled from test mining performed in 2022 as part of the studies undertaken in connection with the potential restart of the Velardeña Properties. In November and December of 2023, the Company finished processing material that had previously been partially processed. During the year ended December 31, 2023, the Company recorded revenue of $1.4 million from the combined sales of these concentrates and related costs of $0.3 million. The concentrate was sold to one customer, a metal trader in Mexico. Under the terms of the Company’s agreement with its customer, title passes and revenue is recognized by the Company when the contractual performance obligations of the parties are completed. A provisional payment for approximately 90% of the contained gold, silver, lead and zinc is made generally within 10 12 ​ There were no concentrate sales during the year ended December 31, 2022. ​ Revenue from Slag Sales ​ During the year ended December 31, 2023, the Company recorded revenue of $0.8 million from Slag sales. Related costs are included in the costs of doré listed above because slag is a residual product of that process. The slag was sold to one customer, a metals refinery located in the United States. Under the terms of the Company’s agreement with its customer, title passes and revenue is recognized by the Company when the contractual performance obligations of the parties are completed which occurs at the time a final payment is made. Final payment is made 30 ​ There were no slag sales during the year ended December 31, 2022. ​ Costs related to the sale of metals products include direct and indirect costs incurred to mine, process and market the products.

Interest and Other Income (Expe

Interest and Other Income (Expense), Net	12 Months Ended
	Dec. 31, 2023
Interest and Other Income (Expense), Net
Interest and Other Income (Expense), Net	18. Interest and Other Income (Expense), Net ​ For the year ended December 31, 2023, the Company recognized approximately $32,000 of interest and other income primarily related to interest income from cash deposits. ​ For the year ended December 31, 2022, the Company recognized approximately $11,000 of interest and other expense primarily related to the financing of the Company’s directors and officers insurance (see Note 13).

Cash Flow Information

Cash Flow Information	12 Months Ended
	Dec. 31, 2023
Cash Flow Information
Cash Flow Information	19. Cash Flow Information ​ The following table reconciles net loss for the period to cash used in operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Cash flows (used in) from operating activities: ​ ​ ​ ​ ​ ​ ​ Net loss ​ $ (9,228) ​ $ (9,906) ​ Adjustments to reconcile net loss to net cash used in operating activities: ​ ​ ​ ​ ​ ​ ​ Depreciation and amortization ​ 530 ​ 369 ​ Accretion of asset retirement obligation ​ 297 ​ 282 ​ Loss on trading securities ​ 9 ​ 47 ​ Gain on sale of assets ​ (2,150) ​ (125) ​ Stock-based compensation ​ 405 ​ 744 ​ Litigation settlement ​ 250 ​ — ​ Changes in operating assets and liabilities from continuing operations: ​ ​ ​ ​ ​ ​ ​ Decrease in inventories, net ​ 511 ​ 232 ​ Increase in value added tax receivable, net ​ (1,670) ​ (209) ​ Decrease in prepaid expenses and other assets ​ 126 ​ 37 ​ Decrease in other long-term assets ​ 223 ​ 414 ​ Increase in accounts payable and other accrued liabilities ​ 1,183 ​ 198 ​ Decrease in deferred revenue ​ ​ — ​ ​ (1,469) ​ Decrease in other current liabilities ​ ​ (109) ​ ​ (81) ​ (Decrease) increase in reclamation liability ​ (195) ​ 41 ​ Decrease in other long-term liabilities ​ (94) ​ (231) ​ Net cash used in operating activities ​ $ (9,912) ​ $ (9,657) ​ ​ The following table sets forth supplemental cash flow information and non-cash transactions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Supplemental disclosure: ​ ​ ​ ​ ​ ​ ​ Interest paid ​ $ 23 ​ $ 9 ​ Income taxes paid ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Supplemental disclosure of non-cash transactions: ​ ​ ​ ​ ​ ​ ​ Deferred equity offering costs amortized ​ $ 45 ​ $ 25 ​ ​

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies
Commitments and Contingencies	20. Commitments and Contingencies ​ Leases and Purchase Commitments ​ The Company has non-cancelable operating lease and other commitments as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ ​ ​ ​ ​ ​ 2024 2025 2026 2027 2028 Thereafter Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ El Quevar mining concessions 1 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ — ​ $ 150 Velardeña mining concessions 1 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ — ​ ​ 160 Velardeña ejido and surface rights 1 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ — ​ ​ 295 Rodeo mining concessions 1 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ — ​ ​ 570 Rodeo ejido and surface rights 1 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ — ​ ​ 205 Operating lease liabilities ​ ​ 105 ​ ​ 10 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 115 Total Commitments ​ $ 381 ​ $ 286 ​ $ 276 ​ $ 276 ​ $ 276 ​ $ — ​ $ 1,495 _______________________ 1 ​ The Company is required to make payments to the Argentine government to maintain its rights to the El Quevar mining concessions. The Company has made such payments totaling approximately $5,000 and $7,000 for the years ended December 31, 2023 and 2022, respectively. ​ The Company is required to pay concession holding fees to the Mexican government to maintain its rights to the Velardeña Properties and Rodeo Property mining concessions. During the years ended December 31, 2023 and 2022 the Company made such payments totaling approximately $136,000 and $107,000 respectively. Additionally, during the years ended December 31, 2023 and 2022, the Company made annual payments to local ejidos and property owners under its surface rights agreements for the Velardeña Properties and Rodeo Property of approximately $117,000 and $300,000 respectively. ​ The Company has office leases for its corporate headquarters in Golden, Colorado, as well as for its Velardeña Properties offices in Mexico, and exploration offices in Mexico and Argentina. The lease for the corporate headquarters expires in January 2025. Payments associated with the corporate headquarters lease were recorded to rent expense by the Company in the amounts of $183,000 and $174,000 for the years ended December 31, 2023 and 2022, respectively. The lease for the Mexican offices expires in October 2024. Payments associated with the Mexican office lease were recorded to rent expense by the Company in the amounts of $73,000 and $59,000 for the years ended December 31, 2023 and 2022, respectively. The lease for the Argentina office was renegotiated and extended during the fourth quarter 2021 and now expires in November 2024. Payments associated with the Argentina office lease were recorded to rent expense by the Company in the amounts of $8,000 and $9,000 for the years ended December 31, 2023 and 2022, respectively. ​ The table above assumes that no annual maintenance payments will be made more than five years after December 31, 2023. If the Company continues mining and processing at the Rodeo or the Velardeña Properties beyond five years, the Company expects that it would make annual concession and surface rights payments of approximately $91,000 per year for the life of the Velardeña mine and approximately $155,000 per year for the life of the Rodeo mine. If the Company continues to evaluate development opportunities at the El Quevar project, the Company expects that it would make annual maintenance payments of approximately $30,000 per year for the life of the El Quevar mine. ​ Payments associated with other exploration concessions the Company owns are not included because the Company has not completed exploration work on these concessions. Exploration success is historically low, and the Company has the right to terminate the payments and release the concessions at any time. ​ Contingencies ​ During April 2021, the Company became aware of a lawsuit in Mexico against one of the Company’s Mexican subsidiaries, Minera William, S.A. de C.V. (“Minera William”). The plaintiff in the matter is Unifin Financiera, S.A.B de C.V. (“Unifin”). The lawsuit was assigned to the Fifth Specialized Commercial District Court. In November 2022, the Company was formally served with the complaint in connection with the lawsuit and in December 2022 the Company filed its answer to the complaint. Unifin is alleging that a representative of Minera William signed certain documents in July 2011 purporting to bind Minera William as a guarantor of payment obligations owed by a third party to Unifin in connection with that third party’s acquisition of certain drilling equipment. At the time the documentation was allegedly signed, Minera William was a subsidiary of ECU Silver Mining prior to the Company’s acquisition of ECU in September 2011. As a preemptive measure, Unifin has obtained a preliminary court order freezing Minera William’s bank accounts in Mexico, which has limited the Company’s and Minera William’s ability to access approximately US$153,000 according to current currency exchange rates. Notwithstanding this action, the restrictions imposed on Minera William’s bank accounts do not impact the Company’s ability to operate the Rodeo mine, which is held through a different Mexico subsidiary. Likewise, the action does not impact the Company’s ability to continue with the Company’s evaluation plans for a potential Velardeña mine restart or move forward with any of the Company’s other exploration programs in Mexico. However, because the Velardeña mine and one processing plant are held by Minera William, any adverse outcome to the action may have a material impact on our ability to restart production at Velardeña. Unifin is seeking recovery for as much as US$12.5 million. The Company believes there is no basis for this claim. A preliminary hearing was initially scheduled to take place in April 2023 but was rescheduled to June 2023. In June 2023 Minera William and Unifin agreed to pursue discussions to settle the matter and the Court agreed to suspend trial to allow Minera William and Unifin to negotiate a settlement agreement. On December 6, 2023, Minera William and Unifin filed a joint motion to notify the court that they entered into the Settlement Agreement. Under the terms of the Settlement Agreement, Minera William has agreed to pay $250,000 to Unifin and Unifin has agreed to release Minera Williams from any future claim related to the dispute. The Settlement Agreement has been approved by Mexico courts. The Company anticipates that the settlement amount will be paid in 2024. An accrued liability has been recorded for $0.25 million as of December 31, 2023 (see Note 5 and Note 13).

Foreign Currency

Foreign Currency	12 Months Ended
	Dec. 31, 2023
Foreign Currency
Foreign Currency	21. Foreign Currency ​ The Company conducts exploration and mining activities primarily in Mexico and Argentina, and gains and losses on foreign currency transactions are related to those activities. The Company’s functional currency is the U.S. dollar but certain transactions are conducted in the local currencies resulting in foreign currency transaction gains or losses.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2023
Segment Information
Segment Information	22. Segment Information ​ The Company’s sole activity is the mining, construction and exploration of mineral properties containing precious metals. The Company’s reportable segments are based on the Company’s revenue-producing activities and cash-consuming activities. The Company reports two segments, one for its revenue-producing activities in Mexico, which includes both the Velardeña Properties and the Rodeo Property, and the other comprised of non-revenue-producing activities, including exploration, construction and general and administrative activities. Intercompany revenue and expense amounts have been eliminated within each segment in order to report on the basis that management uses internally for evaluating segment performance. ​ The financial information relating to the Company’s segments is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Exploration, El ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quevar, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs ​ Depreciation, ​ Velardeña and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Applicable ​ Depletion and ​ Administrative ​ Pre-Tax ​ ​ ​ ​ Capital The Year ended December 31, 2023 ​ Revenue ​ to Sales ​ Amortization ​ Expense ​ Income/(Loss) ​ Total Assets ​ Expenditures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ Mexico Operations ​ $ 12,002 ​ $ (12,358) ​ $ (517) ​ $ (3,676) ​ $ (3,071) ​ $ 8,376 ​ $ — ​ Corporate, Exploration & Other ​ — ​ — ​ (13) ​ (6,171) ​ (6,146) ​ 6,534 ​ — ​ ​ ​ $ 12,002 ​ $ (12,358) ​ $ (530) ​ $ (9,847) ​ $ (9,217) ​ $ 14,910 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year ended December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mexico Operations ​ $ 23,285 ​ $ (17,538) ​ $ (319) ​ $ (8,521) ​ $ (2,212) ​ $ 8,425 ​ $ 44 ​ Corporate, Exploration & Other ​ — ​ — ​ (50) ​ (7,599) ​ (7,606) ​ 6,519 ​ 8 ​ ​ ​ $ 23,285 ​ $ (17,538) ​ $ (369) ​ $ (16,120) ​ $ (9,818) ​ $ 14,944 ​ $ 52 ​ ​ Revenue for the year ended December 31, 2023 and 2022, was from the Company's Rodeo Property in Mexico and the Velardeña Property in Mexico (see Note 17).

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2023
Related Party Transactions
Related Party Transactions	23. Related Party Transactions ​ The following sets forth information regarding transactions between the Company (and its subsidiaries) and its officers, directors and significant stockholders. ​ Administrative Services: ​ In August 2016, the Company began providing limited accounting and other administrative services to Minera Indé, an indirect subsidiary of Sentient. At December 31, 2023, Sentient, through the Sentient executive funds, held approximately 11% of the Company’s 14.1 million shares of issued and outstanding Velardeña care and maintenance

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2023
Subsequent Events
Subsequent Events	24. Subsequent Events ​ Value Added Tax Receivable ​ Subsequent to December 31, 2023, the Company collected approximately $2.1 million of VAT receivable from the Mexican taxing authority (see Note 8). ​ Closure of Velardeña Properties ​ On February 29, 2024 the Company announced that it was stopping operations at the Velardeña Properties. The Company commenced mining activities at the Velardeña Properties in December 2023; however the initial performance of the mine and the processing plant did not achieve the expected results. The employees in Mexico who are currently engaged in shutting down the mine and operating the plants that process the remaining Velardeña mined material will be terminated when all of the mined material has been processed and the Properties have been placed in a state where they can be held for short-term sale while the Company evaluates alternatives to realize value from the assets. ​ Exercise of Pre-Funded Warrants ​ On March 8, 2024, Lind Global Fund II LP exercised their right to purchase 488,572 shares of common stock at an exercise price of $0.0001 (see Note 16).

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2023
Summary of Significant Accounting Policies
Basis of Accounting	The Company’s consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of the Company’s consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to mineral resources and related future metals prices that are the basis for future cash flow estimates utilized in impairment calculations; depreciation, depletion and amortization calculations; environmental reclamation and closure obligations; valuation allowances for deferred tax assets; and the fair value of financial instruments. The Company based its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ significantly from these estimates under different assumptions or conditions.
Basis of Consolidation	​ a. Basis of Consolidation ​ All of the Company’s consolidated subsidiaries are 100% owned and as such the Company does not have a noncontrolling interest in any of its subsidiaries. All intercompany transactions and balances have been eliminated at consolidation.
Translation of Foreign Currencies	b. Translation of Foreign Currencies ​ The Company’s revenue and external funding are primarily denominated in U.S. dollars. Substantially all of the Company’s significant expenditures are made with reference to U.S. dollars. Accordingly, the Company and its subsidiaries use the U.S. dollar as their functional and reporting currency.
Cash and Cash Equivalents	c. Cash and Cash Equivalents ​ The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.
Inventories	d. Inventories ​ Finished goods inventories include doré bars. Doré bars are valued at the lower of the average cost incurred prior to the refining process, plus applicable refining costs, or net realizable value. ​ In-process inventories represent material that is currently in the process of being converted to a saleable product. In-process material is measured based on assays of the material fed into the process and the projected recoveries of the respective processing plants. In-process inventories are valued at the lower of the average cost, plus the in-process conversion costs, or net realizable value. ​ Stockpiles represent ore that has been extracted from the mine and is available for further processing. Costs are added to stockpiles based on current mining costs. Stockpiles are recorded at the lower of average cost or net realizable value, and carrying values are evaluated at least quarterly. Net realizable value represents the estimated future sales price based on short-term and long-term metals price assumptions, less estimated costs to complete production and bring the product to sale. ​ Materials and supplies inventories are valued at the lower of average cost or net realizable value. Cost includes applicable taxes and freight. The Company routinely counts and evaluates its material and supplies to determine the existence of any obsolete stock that is subject to impairment.
Mining Properties, Exploration and Development Costs	e. Mining Properties, Exploration and Development Costs ​ The Company expenses general prospecting costs and the costs of acquiring and exploring unevaluated mining properties. When and if a mining property is determined to have proven and probable mineral reserves, subsequent development costs will be capitalized to mineral properties. For acquired mining properties with proven and probable mineral reserves, the Company will capitalize acquisition costs and subsequent development costs. When and if mining properties with proven and probable reserves are developed and operations commence, capitalized costs will be charged to operations using the units-of-production method over proven and probable reserves. Upon abandonment or sale of a mining property, all capitalized costs relating to the specific property are written off in the period abandoned or sold and a gain or loss is recognized in the accompanying Consolidated Statements of Operations. ​ As discussed in Note 1, the Company is considered an exploration stage company under the criteria set forth by the SEC since it has not yet demonstrated the existence of mineral reserves at any of the Company’s properties. As the Company does not have proven and probable mineral reserves, substantially all expenditures at the Company’s Rodeo Property and the Velardeña Properties for mine construction activity, as well as operating costs associated with the mill facilities, and for items that do not have a readily identifiable market value apart from the mineral resources, have been expensed as incurred. Such costs are charged to cost of metals sold or project expense during the period depending on the nature of the costs. Certain costs may be reflected in inventories prior to the sale of the product. ​ On a quarterly basis the Company evaluates its exploration properties to determine if they meet the Company’s minimum requirements for continued evaluation. The rights to the properties that do not meet the minimum requirements are relinquished and the carrying values, if any, are written off and reflected in “Exploration expense”
Property, Plant and Equipment and Long-Lived Asset Impairment	f. Property, Plant and Equipment and Long-Lived Asset Impairment ​ Buildings are depreciated using the straight–line method over the estimated useful lives of the buildings, typically 30 to 40 years, or the estimated life of the mine, whichever is shorter. Mining equipment and machinery, excluding the plant, are depreciated using the straight-line method over useful lives of three three ​ As discussed above, the Company does not have any properties with proven or probable mineral reserves. ​ Property, plant and equipment are recorded at cost and per the guidance of ASC 360 the Company assesses the recoverability of its property, plant and equipment, whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. If the sum of estimated future net cash flows on an undiscounted basis is less than the carrying amount of the related asset, impairment is considered to exist. The related impairment loss is measured by comparing estimated future net cash flows on a discounted basis or by comparing other market indicators to the carrying amount of the asset. ​ The Company evaluated its remaining long-lived assets at December 31, 2023 and 2022, and determined that no impairment was incurred.
Asset Retirement Obligations	g. Asset Retirement Obligations ​ The Company records asset retirement obligations (“ARO”) in accordance with ASC 410, “Asset Retirement and Environmental Obligations” (“ASC 410”), which establishes a uniform methodology for accounting for estimated reclamation and abandonment costs. According to ASC 410, the fair value of an ARO is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. An offsetting asset retirement cost (“ARC”) is capitalized as part of the carrying value of the assets with which it is associated and depreciated over the useful life of the asset (see Note 12). ​ The Company prepares estimates of the timing and amount of expected cash flows when an ARO is incurred. The fair value of the ARO is measured by discounting the expected cash flows using a discount rate that reflects the credit adjusted risk-free rate of interest. The Company records the fair value of an ARO when it is incurred and layer adjustments of the ARO are recorded as an adjustment to the corresponding ARC. The ARO is adjusted to reflect the passage of time (accretion cost) calculated by applying the discount rate implicit in the initial fair value measurement to the beginning-of-period carrying amount of the ARO. The Company records accretion costs to expense as incurred. ​
Value Added Taxes	h. Value Added Taxes ​ The Company pays value added tax (“VAT”) in Mexico as well as other countries, primarily related to the Rodeo operation and exploration projects. For exploration projects, the amounts paid are generally charged to expense as incurred because of the uncertainty of recoverability. For the Rodeo operation, the Company records VAT paid as a recoverable asset, which appears in “Value added tax receivable, net
Revenue Recognition	i. Revenue Recognition ​ The Company recognizes revenue from the “Sale of Metals
Stock Compensation	j. Stock-Based Compensation ​ The Company records stock-based compensation awards at fair value on the date of the grant and expenses the awards in the Consolidated Statements of Operations over the requisite employee service period on a straight-line basis (see Note 16). The fair value of the awards is based on the Company’s stock price on the date of the grant. The Company recognizes forfeitures as they occur.
Leases	​ k. Leases ​ Effective January 1, 2019 the Company adopted ASU 2016-02 and ASU No. 2018-11, which requires lessees to recognize a right-of-use asset and a lease liability for all leases with terms greater than twelve months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement.
Net Income (Loss) per Share of Common Stock	l. Net Income (Loss) per Share of Common Stock ​ Basic income (loss) per share is computed by dividing net income (loss) available to holders of the Company’s Common Stock by the weighted average number of shares of Common Stock outstanding for the period. Diluted income (loss) per share reflects the potential dilution that would occur if securities or other contracts to issue Common Stock were exercised or converted into Common Stock. ​ At December 31, 2023 and 2022, all potentially dilutive shares relating to warrants and stock compensation awards were excluded from the computation of diluted earnings per share because to include them would have been anti-dilutive.
Income Taxes	m. Income Taxes ​ The Company accounts for income taxes in accordance with the provisions of ASC 740, “Income Taxes” (“ASC 740”), on a tax jurisdictional basis. The Company files United States and certain other foreign country income tax returns, and pays taxes reasonably determined to be due. The tax rules and regulations in these countries are highly complex and subject to interpretation. The Company’s income tax returns are subject to examination by the relevant taxing authorities and in connection with such examinations, disputes can arise with the taxing authorities over the interpretation or application of certain tax rules within the country involved. In accordance with ASC 740, the Company identifies and evaluates uncertain tax positions, and recognizes the impact of uncertain tax positions for which there is a less than more-likely-than-not probability of the position being upheld when reviewed by the relevant taxing authority. Such positions are deemed to be unrecognized tax benefits and a corresponding liability is established on the balance sheet. ​ The Company classifies income tax related interest and penalties as income tax expense.
Recently Issued Pronouncements	n. Recently Issued Pronouncements ​ In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The new standard requires enhanced disclosures about significant segment expenses and other segment items and interim disclosure of items that were previously required on an annual basis. ASU 2023-07 is to be applied on a retrospective basis and is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the impact of adopting ASU 2023-07 on our consolidated financial statements. ​ In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update are intended to enhance the transparency and decision usefulness of income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update is effective for annual periods beginning after December 15, 2024. Early adoption is permitted and should be applied on a prospective basis, however retrospective application is permitted. We are currently evaluating the impact of adopting ASU 2023-09 on our consolidated financial statements.

Cash and Cash Equivalents and_2

Cash and Cash Equivalents and Short-Term Investments (Tables)	12 Months Ended
	Dec. 31, 2023
Cash and Cash Equivalents and Short-Term Investments
Schedule of short-term investments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Estimated Carrying December 31, 2023 ​ Cost ​ Fair Value ​ Value ​ ​ ​ (in ​ Short-term investments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 59 ​ $ 11 ​ $ 11 ​ Total trading securities ​ 59 ​ 11 ​ 11 ​ Total short-term investments ​ $ 59 ​ $ 11 ​ $ 11 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 59 ​ $ 20 ​ $ 20 ​ Total trading securities ​ 59 ​ 20 ​ 20 ​ Total short-term investments ​ $ 59 ​ $ 20 ​ $ 20 ​

Prepaid Expenses and Other As_2

Prepaid Expenses and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2023
Prepaid Expenses and Other Assets
Schedule of prepaid expenses and other current assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 31, ​ ​ 2023 2022 ​ ​ ​ (in thousands) Prepaid insurance ​ $ 319 ​ $ 488 ​ Current portion of deferred offering costs ​ ​ — ​ ​ 45 ​ Recoupable deposits and other ​ 653 ​ 609 ​ ​ ​ $ 972 ​ $ 1,142 ​

Inventories, Net (Tables)

Inventories, Net (Tables)	12 Months Ended
	Dec. 31, 2023
Inventories
Schedule of inventories at the Velardea Properties	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 2022 ​ ​ (in thousands) ​ Doré inventory ​ $ 248 ​ $ 230 ​ In-process inventory ​ 31 ​ 572 ​ Material and supplies, net ​ ​ 551 ​ ​ 569 ​ ​ ​ $ 830 ​ $ 1,371 ​

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment, Net
Schedule of components of property, plant and equipment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2023 2022 ​ ​ (in thousands) Mineral properties ​ $ 9,353 ​ $ 9,353 ​ Exploration properties ​ ​ 2,418 ​ ​ 2,418 ​ Royalty properties ​ 200 ​ 200 ​ Buildings ​ 3,672 ​ 3,808 ​ Mining equipment and machinery ​ 14,908 ​ 17,127 ​ Other furniture and equipment ​ 1,378 ​ 1,355 ​ Asset retirement cost ​ 1,158 ​ 1,157 ​ ​ ​ 33,087 ​ 35,418 ​ Less: Accumulated depreciation and amortization ​ (27,266) ​ (29,002) ​ ​ ​ $ 5,821 ​ $ 6,416 ​

Accounts Payable and Other Ac_2

Accounts Payable and Other Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Accounts Payable and Other Accrued Liabilities
Schedule of accounts payable and other accrued liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ ​ 2023 ​ 2022 ​ ​ (in thousands) Accounts payable and accruals ​ $ 3,586 ​ $ 2,206 ​ Accrued employee compensation and benefits ​ ​ 1,281 ​ ​ 1,478 ​ Income taxes payable (Note 15) ​ 32 ​ 25 ​ ​ ​ $ 4,899 ​ $ 3,709 ​

Asset Retirement and Reclamat_2

Asset Retirement and Reclamation Liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Asset Retirement and Reclamation Liabilities
Schedule of asset retirement obligations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Current asset retirement and reclamation liabilities ​ $ 150 ​ $ — Non-current asset retirement and reclamation liabilities ​ 4,096 ​ 3,993 ​ ​ $ 4,246 ​ $ 3,993
Summary of activity in the Velardena Properties ARO	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Balance at January 1, ​ $ 3,993 ​ $ 3,569 Changes in estimates, and other ​ (44) ​ 142 Accretion expense ​ 297 ​ 282 Balance at December 31, ​ $ 4,246 ​ $ 3,993

Other Liabilities (Tables)

Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Other Liabilities.
Schedule of other current liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 ​ 2022 ​ ​ (in thousands) Premium financing ​ $ 269 ​ $ 406 Operating lease liability ​ 105 ​ 164 Mining equipment lease liability ​ ​ — ​ ​ 70 Litigation contingency accrual ​ ​ 250 ​ ​ — Current asset retirement and reclamation liabilities ​ ​ 150 ​ ​ — ​ ​ $ 774 ​ $ 640
Schedule of other long-term liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2023 ​ 2022 ​ ​ (in thousands) Operating lease liability ​ $ 10 ​ $ 107 Deposits and other ​ ​ 18 ​ ​ 15 ​ ​ $ 28 ​ $ 122

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Measurements
Schedule of financial assets and liabilities at fair value by respective level of the fair value hierarchy	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total ​ ​ (in thousands) At December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 3,766 ​ $ — ​ $ — ​ $ 3,766 ​ Short-term investments ​ 11 ​ — ​ — ​ 11 ​ ​ ​ $ 3,777 ​ $ — ​ $ — ​ $ 3,777 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 3,972 ​ $ — ​ $ — ​ $ 3,972 ​ Short-term investments ​ 20 ​ — ​ — ​ 20 ​ ​ ​ $ 3,992 ​ $ — ​ $ — ​ $ 3,992 ​

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Taxes
Schedule of the provision for income taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended December 31, ​ ​ 2023 ​ 2022 CURRENT TAXES: ​ (in thousands) United States ​ $ — ​ $ — Other Countries ​ 11 ​ 107 ​ ​ $ 11 ​ $ 107 DEFERRED TAXES: ​ ​ ​ ​ ​ ​ United States ​ $ — ​ $ — Other Countries ​ — ​ (19) ​ ​ $ — ​ $ (19) Total income tax provision ​ $ 11 ​ $ 88
Schedule of income (loss) from operations before income taxes by country	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended December 31, ​ ​ 2023 2022 ​ ​ (in thousands) United States ​ $ (7,809) ​ $ (10,151) ​ Other Countries ​ (1,408) ​ 333 ​ ​ ​ $ (9,217) ​ $ (9,818) ​
Summary of reconciliation of the provision for income taxes computed at the statutory rate to the provision for income taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Tax expense (benefit) at U.S. rate of 21% ​ $ (1,936) ​ $ (2,062) ​ Other adjustments: ​ ​ ​ ​ ​ ​ ​ Rate differential of other jurisdictions ​ (342) ​ (387) ​ Effects of foreign earnings ​ (2,103) ​ (1,631) ​ Change in valuation allowance ​ (2,737) ​ (3,619) ​ Provision to tax return true-ups ​ ​ 557 ​ ​ 113 ​ Exchange rate changes on deferred tax assets ​ ​ (4,744) ​ ​ 3,234 ​ Expired net operating losses ​ ​ 11,186 ​ ​ 4,099 ​ Other ​ 130 ​ 341 ​ Income tax provision ​ $ 11 ​ $ 88 ​
Schedule of components of the deferred tax assets and deferred tax liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended ​ ​ December 31, ​ 2023 2022 ​ ​ (in thousands) Deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Net operating loss carryforwards ​ $ 104,956 ​ $ 109,397 ​ Capital loss carry forwards ​ 1,702 ​ 1,702 ​ Reclamation Costs ​ ​ 1,226 ​ ​ 1,184 ​ Stock-based compensation ​ 790 ​ 868 ​ Property, plant and equipment ​ 2,121 ​ 2,428 ​ Other ​ 1,639 ​ 2,296 ​ ​ ​ 112,434 ​ 117,875 ​ Less: Valuation allowance ​ (111,250) ​ (113,987) ​ Total deferred tax assets ​ 1,184 ​ 3,888 ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Property, plant and equipment ​ (1,023) ​ (3,831) ​ Other ​ (161) ​ (57) ​ Total deferred tax liabilities ​ (1,184) ​ (3,888) ​ Net deferred tax asset (liability) ​ $ — ​ $ — ​
Schedule of reconciliation of the beginning and ending amount of gross unrecognized tax benefits	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Gross unrecognized tax benefits at beginning of period ​ $ — ​ $ — ​ Increases for tax positions taken during prior years ​ — ​ — ​ Decreases relating to settlements with taxing authorities ​ — ​ — ​ Reductions due to lapse of statute of limitations ​ — ​ — ​ Gross unrecognized tax benefits at end of period ​ $ — ​ $ — ​

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2023
Schedule of status of the restricted stock grants	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ ​ 2023 ​ 2022 ​ ​ Weighted ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Grant Date ​ ​ ​ Grant Date ​ ​ Number of ​ Fair Value ​ Number of ​ Fair Value Restricted Stock Grants ​ Shares ​ Per Share ​ Shares ​ Per Share Outstanding at beginning of period ​ 19,800 ​ $ 10.95 ​ 11,733 ​ $ 15.26 ​ Granted during the period — ​ — 22,000 ​ 9.41 ​ Restrictions lifted during the period (12,933) ​ 11.97 (13,933) ​ 12.14 ​ Forfeited during the period (1,067) ​ 9.75 — ​ — ​ Outstanding at end of period ​ 5,800 ​ $ 8.89 ​ 19,800 ​ $ 10.95 ​
Schedule of status of the stock option grants issued under the Equity Plan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year Ended December 31, ​ ​ 2023 ​ 2022 ​ ​ Weighted ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Grant Date ​ ​ ​ Grant Date ​ ​ Number of ​ Fair Value ​ Number of ​ Fair Value ​ Restricted Stock Units ​ Shares ​ Per Share ​ Shares ​ Per Share Outstanding at beginning of period ​ 232,409 ​ $ 15.06 ​ 164,409 ​ $ 17.20 ​ Granted during the period 40,000 ​ 1.62 68,000 ​ 9.90 ​ Restrictions lifted during the period — ​ — — ​ — ​ Forfeited during the period — ​ — — ​ — ​ Outstanding at end of period ​ 272,409 ​ $ 13.09 232,409 ​ $ 15.06 ​
Summary of the status of the Company's common stock warrants	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ Number of ​ Average ​ ​ Underlying ​ Exercise Price Common Stock Warrants ​ Shares ​ Per Share Outstanding at December 31, 2021 ​ 512,155 ​ $ 8.62 Exercised during period ​ ​ ​ ​ ​ July 2019 Series B Warrants ​ (120,000) ​ ​ 8.75 Outstanding at December 31, 2022 ​ 392,155 ​ $ 8.58 Granted during period ​ ​ ​ June 2023 Pre-Funded Warrants ​ 637,587 ​ ​ 0.0001 June 2023 Warrants ​ 1,427,587 ​ ​ 1.90 November 2023 Series A Warrants ​ 6,000,000 ​ ​ 0.70 November 2023 Series B Warrants ​ 3,000,000 ​ ​ 0.70 November 2023 Pre-Funded Warrants ​ 1,287,512 ​ ​ 0.0001 Exercised during period ​ ​ ​ ​ ​ June 2023 Pre-Funded Warrants ​ (637,587) ​ ​ 0.0001 November 2023 Pre-Funded Warrants ​ (798,940) ​ ​ 0.0001 Outstanding at December 31, 2023 ​ 11,308,314 ​ $ 1.09
April 2020
Summary of the status of the Company's common stock warrants	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Number of ​ Exercise ​ ​ Common Stock Warrants ​ Warrants ​ Price ​ Expiration Date July 2019 Series A Warrants 338,155 $ 8.75 January 17, 2025 July 2019 Series B Warrants ​ — ​ $ 8.75 ​ May 6, 2022 April 2020 Series A Warrants ​ 44,000 ​ $ 7.50 ​ October 22, 2025 April 2020 Series B Warrants ​ 10,000 ​ $ 7.50 ​ October 22, 2025 June 2023 Pre-Funded Warrants ​ — ​ $ 0.0001 ​ December 26, 2028 June 2023 Warrants ​ 1,427,587 ​ $ 1.90 ​ December 26, 2028 November 2023 Series A Warrants ​ 6,000,000 ​ $ 0.70 ​ November 6, 2023 November 2023 Series B Warrants ​ 3,000,000 ​ $ 0.70 ​ November 6, 2023 November 2023 Pre-Funded Warrants ​ 488,572 ​ $ 0.0001 ​ Upon exercise ​ ​ 11,308,314 ​ ​ ​ ​ ​

Cash Flow Information (Tables)

Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2023
Cash Flow Information
Schedule of reconciliation of net loss for the period to cash used in operations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Cash flows (used in) from operating activities: ​ ​ ​ ​ ​ ​ ​ Net loss ​ $ (9,228) ​ $ (9,906) ​ Adjustments to reconcile net loss to net cash used in operating activities: ​ ​ ​ ​ ​ ​ ​ Depreciation and amortization ​ 530 ​ 369 ​ Accretion of asset retirement obligation ​ 297 ​ 282 ​ Loss on trading securities ​ 9 ​ 47 ​ Gain on sale of assets ​ (2,150) ​ (125) ​ Stock-based compensation ​ 405 ​ 744 ​ Litigation settlement ​ 250 ​ — ​ Changes in operating assets and liabilities from continuing operations: ​ ​ ​ ​ ​ ​ ​ Decrease in inventories, net ​ 511 ​ 232 ​ Increase in value added tax receivable, net ​ (1,670) ​ (209) ​ Decrease in prepaid expenses and other assets ​ 126 ​ 37 ​ Decrease in other long-term assets ​ 223 ​ 414 ​ Increase in accounts payable and other accrued liabilities ​ 1,183 ​ 198 ​ Decrease in deferred revenue ​ ​ — ​ ​ (1,469) ​ Decrease in other current liabilities ​ ​ (109) ​ ​ (81) ​ (Decrease) increase in reclamation liability ​ (195) ​ 41 ​ Decrease in other long-term liabilities ​ (94) ​ (231) ​ Net cash used in operating activities ​ $ (9,912) ​ $ (9,657) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2023 2022 ​ ​ (in thousands) Supplemental disclosure: ​ ​ ​ ​ ​ ​ ​ Interest paid ​ $ 23 ​ $ 9 ​ Income taxes paid ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Supplemental disclosure of non-cash transactions: ​ ​ ​ ​ ​ ​ ​ Deferred equity offering costs amortized ​ $ 45 ​ $ 25 ​ ​

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies
Schedule of non-cancellable operating lease commitments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ ​ ​ ​ ​ ​ 2024 2025 2026 2027 2028 Thereafter Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ El Quevar mining concessions 1 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ 30 ​ $ — ​ $ 150 Velardeña mining concessions 1 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ 32 ​ ​ — ​ ​ 160 Velardeña ejido and surface rights 1 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ 59 ​ ​ — ​ ​ 295 Rodeo mining concessions 1 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ 114 ​ ​ — ​ ​ 570 Rodeo ejido and surface rights 1 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ 41 ​ ​ — ​ ​ 205 Operating lease liabilities ​ ​ 105 ​ ​ 10 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 115 Total Commitments ​ $ 381 ​ $ 286 ​ $ 276 ​ $ 276 ​ $ 276 ​ $ — ​ $ 1,495 _______________________ 1 ​

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2023
Segment Information
Schedule of financial information relating to discontinued operations and continuing operations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Exploration, El ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quevar, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs ​ Depreciation, ​ Velardeña and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Applicable ​ Depletion and ​ Administrative ​ Pre-Tax ​ ​ ​ ​ Capital The Year ended December 31, 2023 ​ Revenue ​ to Sales ​ Amortization ​ Expense ​ Income/(Loss) ​ Total Assets ​ Expenditures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ Mexico Operations ​ $ 12,002 ​ $ (12,358) ​ $ (517) ​ $ (3,676) ​ $ (3,071) ​ $ 8,376 ​ $ — ​ Corporate, Exploration & Other ​ — ​ — ​ (13) ​ (6,171) ​ (6,146) ​ 6,534 ​ — ​ ​ ​ $ 12,002 ​ $ (12,358) ​ $ (530) ​ $ (9,847) ​ $ (9,217) ​ $ 14,910 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Year ended December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mexico Operations ​ $ 23,285 ​ $ (17,538) ​ $ (319) ​ $ (8,521) ​ $ (2,212) ​ $ 8,425 ​ $ 44 ​ Corporate, Exploration & Other ​ — ​ — ​ (50) ​ (7,599) ​ (7,606) ​ 6,519 ​ 8 ​ ​ ​ $ 23,285 ​ $ (17,538) ​ $ (369) ​ $ (16,120) ​ $ (9,818) ​ $ 14,944 ​ $ 52 ​

Nature of Operations (Details)

Nature of Operations (Details)	12 Months Ended
	Dec. 31, 2023 property
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of additional selected properties advanced in portfolio	11
Rodeo Property
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100%
Velardena Properties
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100%
El Quevar mining concessions
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100%

Nature of Operations - Reverse

Nature of Operations - Reverse Stock Split (Details)	Jun. 09, 2023 shares	Dec. 31, 2023 $ / shares shares	Jun. 08, 2023 shares	May 26, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares
Nature of Operations
Common stock, par value (in dollars per share) | $ / shares		$ 0.01		$ 0.01	$ 0.01
Reverse stock split	0.04
Common stock, shares authorized	28,000,000	28,000,000	350,000,000		28,000,000
Reverse stock split, number of fractional shares				0

Liquidity, Capital Resources _2

Liquidity, Capital Resources and Going Concern (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) $ / oz	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Mar. 11, 2024 shares	Nov. 06, 2023 shares	Jun. 09, 2023 shares	Jun. 08, 2023 shares
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Current assets		$ 8,714	$ 7,970
Cash and cash equivalents		3,766	3,972
Current liabilities		5,673	4,349
Net operating margin (loss)		$ (9,120)	$ (10,146)
Common stock, shares authorized | shares		28,000,000	28,000,000			28,000,000	350,000,000
November 2023 Offering
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of available shares authorized but not yet outstanding | shares					4,712,488
Subsequent Event
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of available shares authorized but not yet outstanding | shares				1,900,000
Common stock, shares authorized | shares				28,000,000
Gold [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Expected metals prices | $ / oz	1,948
Silver
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Expected metals prices | $ / oz	24.34
Scenario, Forecast
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Amount of administrative expenses, exploration expenses and shutdown expense	$ 9,000
Scenario, Forecast | Minimum
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Amount of additional capital inflows	7,600
Scenario, Forecast | Minimum | Rodeo Project
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Net operating margin (loss)	(2,000)
Scenario, Forecast | Maximum
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Amount of additional capital inflows	8,600
Scenario, Forecast | Maximum | Rodeo Project
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Net operating margin (loss)	$ (2,500)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Nature of Operations
Ownership percentage of subsidiaries	100%
Impairment of long lived assets	$ 0	$ 0
Building [Member] | Minimum [Member]
Nature of Operations
Useful life	30 years
Building [Member] | Maximum [Member]
Nature of Operations
Useful life	40 years
Machinery and Equipment [Member] | Minimum [Member]
Nature of Operations
Useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Nature of Operations
Useful life	8 years
Office Equipment [Member] | Minimum [Member]
Nature of Operations
Useful life	3 years
Office Equipment [Member] | Maximum [Member]
Nature of Operations
Useful life	5 years

Correction of Immaterial Error

Correction of Immaterial Error (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ (547,188,000)	$ (537,960,000)
Revision of Prior Period Error Correction Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit			$ (93,000)

Cash and Cash Equivalents and_3

Cash and Cash Equivalents and Short-Term Investments (Details) - USD ($)		1 Months Ended	12 Months Ended
	Aug. 29, 2023	Aug. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Cash and cash equivalents			$ 3,766,000	$ 3,972,000
Cash and cash equivalent, frozen bank balance			153,000
Trading securities, cost			59,000	59,000
Total short-term investments, cost			59,000	59,000
Total short-term investments			11,000	20,000
Aggregate purchase price			40,000	225,000
Financial institutions minimum net worth			$ 1,000,000,000
Golden Gryphon Explorations Inc
Shares purchased	150,880	1,500,000	1,650,880
Aggregate purchase price	$ 40,000	$ 225,000
Trading securities
Trading securities, cost			$ 59,000	$ 59,000
Sale of Santa Maria Property | Options Agreement | Fabled Copper Corp.
Consideration received in shares | shares				20,000
Percentage of interest claims			100%
Sale of Santa Maria Property | Options Agreement | Fabled Silver Gold Corp.
Consideration received in shares | shares			200,000
Estimate of Fair Value Measurement
Trading securities			$ 11,000	$ 20,000
Total short-term investments			11,000	20,000
Estimate of Fair Value Measurement | Trading securities
Trading securities			11,000	20,000
Reported Value Measurement
Trading securities			11,000	20,000
Total short-term investments			11,000	20,000
Reported Value Measurement | Trading securities
Trading securities			$ 11,000	$ 20,000

Prepaid Expenses and Other As_3

Prepaid Expenses and Other Assets (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Prepaid Expenses and Other Assets
Prepaid insurance	$ 319,000	$ 488,000
Current portion of deferred offering costs		45,000
Recoupable deposits and other	653,000	609,000
Prepaid expenses and other assets	972,000	1,142,000
Receivables for reimbursement of costs	$ 27,000	$ 196,000

Inventories, Net (Details)

Inventories, Net (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) oz	Dec. 31, 2022 USD ($) oz
Inventories, Net	$ 830,000	$ 1,371,000
Velardena Properties
Dore inventory	248,000	230,000
In-process inventory	31,000	572,000
Material and supplies, net	551,000	569,000
Inventories, Net	830,000	1,371,000
Capitalized depreciation and amortization	$ 21,000	$ 28,000
Dore inventory gold | oz	173	157
Dore inventory silver | oz	1,383	652
Velardena and Rodeo operations
Obsolescence allowance	$ 314,000	$ 302,000

Value Added Tax Receivable, N_2

Value Added Tax Receivable, Net (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Value added tax receivable	$ 3,135,000	$ 1,465,000
MEXICO
Value added tax receivable	3,100,000	1,500,000
VAT receivables offset against VAT payable	$ 764,000	$ 450,000

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 33,087,000	$ 35,418,000
Less: Accumulated depreciation and amortization	(27,266,000)	(29,002,000)
Property, plant and equipment, net	5,821,000	6,416,000
Depreciation and amortization	530,000	369,000
Mineral properties
Property, Plant and Equipment, Net
Property, plant and equipment, gross	9,353,000	9,353,000
Exploration properties
Property, Plant and Equipment, Net
Property, plant and equipment, gross	2,418,000	2,418,000
Royalty properties
Property, Plant and Equipment, Net
Property, plant and equipment, gross	200,000	200,000
Buildings
Property, Plant and Equipment, Net
Property, plant and equipment, gross	3,672,000	3,808,000
Mining equipment and machinery
Property, Plant and Equipment, Net
Property, plant and equipment, gross	14,908,000	17,127,000
Other furniture and equipment
Property, Plant and Equipment, Net
Property, plant and equipment, gross	1,378,000	1,355,000
Asset retirement cost
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 1,158,000	$ 1,157,000

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - Disposals (Details)					12 Months Ended
	Dec. 01, 2023 USD ($)	Dec. 09, 2022 USD ($) installment	Dec. 04, 2020 USD ($)	Apr. 09, 2020	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment, Net
Minimum work expenditures spend to withdraw agreement					$ 1,000,000
Contract with customer liability					$ 0	$ 0	$ 1,500,000
El Quevar mining concessions
Property, Plant and Equipment, Net
Ownership after transaction (as a percent)				70%
Sale of Santa Maria Property
Property, Plant and Equipment, Net
Ownership after transaction (as a percent)			100%
Cash consideration received			$ 4,500,000
Sale of Santa Maria Property | Fabled Copper Corp. | Binding Letter of Intent Agreement
Property, Plant and Equipment, Net
Second year anniversary consideration		$ 2,000,000
Number of quarterly installments of second year anniversary | installment		8
Amount of second year anniversary consideration		$ 250,000
Sale of Santa Maria Property | Transformaciones y Servicios Metalurgicos S.A. DE C.V
Property, Plant and Equipment, Net
Percentage of interest sold	100%
Proceeds from sale of properties	$ 1,500,000
Proceeds from sale of properties in Value-Added Tax	$ 240,000
Net smelter return royalty (as a percent)	1.50%
Cap of net smelter return royalty	$ 1,000,000
Purchase the right to receive the NSR royalty	$ 500,000
Carrying value of Sales						$ 0

Right-of-Use Assets (Details)

Right-of-Use Assets (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2019	Jun. 30, 2019	Jun. 01, 2019
Change in Accounting Principle
Operating lease liability statement of financial position (Extensible list)	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities
Rodeo Property
Change in Accounting Principle
Term of operating lease				27 months
Right of use assets				$ 420,000
Lease liability				$ 420,000
Future lease payments discount rate				7%
COLORADO
Change in Accounting Principle
Term of operating lease							5 years 8 months
Right of use assets						$ 465,000
Lease liability						$ 450,000
Future lease payments discount rate						9.50%
MEXICO
Change in Accounting Principle
Term of operating lease					4 years
Right of use assets					$ 174,000
Argentina
Change in Accounting Principle
Term of operating lease			3 years
Right of use assets			$ 27,000
Lease liability			$ 27,000

Accounts Payable and Other Ac_3

Accounts Payable and Other Accrued Liabilities (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Accounts payable and accruals	$ 3,586,000	$ 2,206,000
Accrued employee compensation and benefits	1,281,000	1,478,000
Income taxes payable (Note 15)	32,000	25,000
Accounts payable and other accrued liabilities	4,899,000	3,709,000
Accrued vacation	400,000	400,000
Withholding taxes and benefits payable	900,000	1,100,000
Velardena Properties
Accounts payable and accruals	2,500,000	1,800,000
Accrued employee compensation and benefits	1,100,000	1,200,000
Corporate administrative and exploration
Accounts payable and accruals	1,100,000	400,000
Employee Related Liabilities Current
Restructuring charges payable	$ 26,000	$ 162,000

Asset Retirement and Reclamat_3

Asset Retirement and Reclamation Liabilities (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2012
Current asset retirement and reclamation liabilities		$ 150,000
Non-current asset retirement and reclamation liabilities		4,096,000	$ 3,993,000
Total	$ 3,569,000	4,246,000	3,993,000
Summary of activity in the Velardena Operations ARO
ARO, Beginning balance		3,993,000	3,569,000
Changes in estimates, and other		(44,000)	142,000
Accretion expense		297,000	282,000
ARO, Ending balance	$ 3,569,000	$ 4,246,000	$ 3,993,000
Velardena Properties
Non-current asset retirement and reclamation liabilities				$ 1,900,000
Reclamation activity extension term	7 years	1 year

Other Liabilities (Details)

Other Liabilities (Details)	1 Months Ended
	Nov. 30, 2023 USD ($) installment	May 31, 2023 USD ($) installment	Nov. 30, 2022 USD ($) installment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Other Current Liabilities
Premium financing				$ 269,000	$ 406,000
Operating lease liability				105,000	164,000
Mining equipment lease liability					70,000
Litigation contingency accrual				250,000
Current asset retirement and reclamation liabilities				150,000
Other current liabilities				774,000	640,000
Operating lease liability				10,000	107,000
Deposits and other				18,000	15,000
Other Liabilities, Noncurrent, Total				28,000	122,000
General Liability
Other Current Liabilities
Number of payment | installment	11
Premium interest rate	8.50%
Insurance premium payable	$ 276,000
Directors and Officers Liability Insurance
Other Current Liabilities
Premium financing				$ 269,000
Directors and Officers Liability, and General Liability Insurance
Other Current Liabilities
Premium financing					$ 406,000
Number of payment | installment		11	11
Premium interest rate		8.30%	7%
Insurance premium payable		$ 148,000	$ 445,000

Fair value measurements (Detail

Fair value measurements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair value measurements
Changes in estimates, and other	$ (44,000)	$ 142,000
Fair value Assumptions
Fair value adjustments to long lived assets	$ 0	$ 0
Fabled Copper Corp. | Sale, not discontinued operations | Binding Letter of Intent Agreement
Fair value Assumptions
Consideration received in shares | shares	200,000
Level 1 | Fabled Copper Corp. | Binding Letter of Intent Agreement
Fair value Assumptions
Investment shares held (in shares)		20,000
Fair Value, Measurements, Recurring
Fair value measurements
Cash and cash equivalents	$ 3,766,000	$ 3,972,000
Short-term investments	11,000	20,000
Assets	3,777,000	3,992,000
Fair Value, Measurements, Recurring | Level 1
Fair value measurements
Cash and cash equivalents	3,766,000	3,972,000
Short-term investments	11,000	20,000
Assets	$ 3,777,000	$ 3,992,000

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Current tax expense	$ 11,000	$ 107,000
Deferred tax expense	$ 0	$ (19,000)

Income Taxes - Provision for in

Income Taxes - Provision for income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CURRENT TAXES:
Other Countries	$ 11,000	$ 107,000
Total current taxes	11,000	107,000
DEFERRED TAXES:
Other Countries		(19,000)
Total income tax provision	0	(19,000)
Income tax provision	$ 11,000	$ 88,000

Income Taxes - Tax Expense (Det

Income Taxes - Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income (loss) from continuing operations before income taxes
United States	$ (7,809)	$ (10,151)
Other Countries	(1,408)	333
Loss from operations before income taxes	(9,217)	(9,818)
Reconciliation of the provision for income taxes computed at the statutory rate to the provision for income taxes
Tax expense (benefit) at US rate of 21%	(1,936)	(2,062)
Other adjustments:
Rate differential of other jurisdictions	(342)	(387)
Effects of foreign earnings	(2,103)	(1,631)
Change in valuation allowance	(2,737)	(3,619)
Provision to tax return true-ups	557	113
Exchange rate changes on deferred tax assets	(4,744)	3,234
Expired net operating losses	11,186	4,099
Other	130	341
Income tax provision	$ 11	$ 88
US rate (as a percent)	21%	21%

Income Taxes - Deferred (Detail

Income Taxes - Deferred (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 104,956,000	$ 109,397,000
Capital loss carry forwards	1,702,000	1,702,000
Reclamation Costs	1,226,000	1,184,000
Stock-based compensation	790,000	868,000
Property, plant and equipment	2,121,000	2,428,000
Other	1,639,000	2,296,000
Deferred tax assets, gross	112,434,000	117,875,000
Less: Valuation allowance	(111,250,000)	(113,987,000)
Total deferred tax assets	1,184,000	3,888,000
Deferred tax liabilities:
Property, plant and equipment	(1,023,000)	(3,831,000)
Other	(161,000)	(57,000)
Total deferred tax liabilities	(1,184,000)	(3,888,000)
Net deferred tax liabilities	$ 0	$ 0

Income Taxes - NOL Carryforward

Income Taxes - NOL Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 418,500
Valuation allowance offsetting the deferred tax assets	111,250	$ 113,987
SPAIN
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	89,400
Other Countries [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	182,500
UNITED STATES
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	100,700
Net operating loss carryforwards with no expiration	30,200
Velardena Properties | MEXICO
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 45,800

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Unrecognized tax benefits including estimated penalties and interest	$ 0	$ 0
Interest and penalties recognized in the statement of operations	0	0
Interest and penalties accrued recognized in the statement of financial position	$ 0	$ 0

Equity - Offering and Private P

Equity - Offering and Private Placement Transaction (Details)				3 Months Ended		12 Months Ended
	Nov. 06, 2023 USD ($) $ / shares shares	Jun. 26, 2023 USD ($) $ / shares shares	Jun. 09, 2023 shares	Dec. 31, 2023 $ / shares shares	Sep. 30, 2023 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Jun. 08, 2023 shares	May 26, 2023 $ / shares
Subsidiary, Sale of Stock [Line Items]
Reverse stock split			0.04
Common stock, shares authorized | shares			28,000,000	28,000,000		28,000,000	28,000,000		350,000,000
Exercise price of warrants (in dollars per share)				$ 1.09		$ 1.09	$ 8.58	$ 8.62
Total cost of offering | $	$ 393,000	$ 215,000
Placement agent fee (as a percent)	6%	6%
Common stock, par value (in dollars per share)				0.01		0.01	0.01			$ 0.01
Purchase price				1.09		$ 1.09	$ 8.58	$ 8.62
Proceeds from issuance of common stock, net of issuance costs | $						$ 7,500,000	$ 1,780,000
November 2023 Pre-Funded Warrants
Subsidiary, Sale of Stock [Line Items]
Number of common shares which can be purchased with each warrant | shares	1
Exercise price of warrants (in dollars per share)	$ 0.0001			$ 0.0001		$ 0.0001
Number of warrants exercised | shares				798,940
Net proceeds | $	$ 79.89
Purchase price	$ 0.0001			$ 0.0001		0.0001
Percentage of common stock	4.99%
June 2023 pre-funded warrants
Subsidiary, Sale of Stock [Line Items]
Exercise price of warrants (in dollars per share)				0.0001		0.0001
Purchase price				$ 0.0001		$ 0.0001
Offering And Private Placement Transaction
Subsidiary, Sale of Stock [Line Items]
Aggregate gross proceeds | $		$ 2,100,000
June 2023 Offering
Subsidiary, Sale of Stock [Line Items]
Aggregate number of common stock sold (Shares) | shares		790,000
Purchase price (in dollars per shares)		$ 1.45
Warrants to purchase common stock | shares		637,587
Purchase price per warrant		$ 1.4499
Threshold minimum beneficial ownership percentage		9.99%
Number of common shares which can be purchased with each warrant | shares		1
Exercise price of warrants (in dollars per share)		$ 0.0001
Sale price (in dollars per shares)		1.45
Purchase price		$ 0.0001
June 2023 Offering | June 2023 pre-funded warrants
Subsidiary, Sale of Stock [Line Items]
Number of warrants exercised | shares					637,587
Net proceeds | $					$ 63.76
November 2023 Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares to be sold | shares	4,712,488
Common stock, par value (in dollars per share)	$ 0.01
Proceeds from issuance of common stock, net of issuance costs | $	$ 4,200,000
November 2023 Offering | Prefunded Warrants And Common Warrants November 2023
Subsidiary, Sale of Stock [Line Items]
Warrants to purchase common stock | shares	1,287,512
November 2023 Offering | Series A Warrants
Subsidiary, Sale of Stock [Line Items]
Purchase price (in dollars per shares)	$ 0.70
Warrants to purchase common stock | shares	6,000,000
Exercise price of warrants (in dollars per share)	$ 0.70
Expiration term of warrant	5 years
Sale price (in dollars per shares)	$ 0.70
Purchase price	$ 0.70
November 2023 Offering | Series B Warrants [Member]
Subsidiary, Sale of Stock [Line Items]
Warrants to purchase common stock | shares	3,000,000
Exercise price of warrants (in dollars per share)	$ 0.70
Expiration term of warrant	18 months
Purchase price	$ 0.70
June 2023 Private Placement
Subsidiary, Sale of Stock [Line Items]
Number of common shares which can be purchased with each warrant | shares		1,427,587
Exercise price of warrants (in dollars per share)		$ 1.90
Warrants exercise period		6 months
Expiration term of warrant		5 years
Purchase price		$ 1.90
June 2023 Private Placement | Series A Warrants
Subsidiary, Sale of Stock [Line Items]
Net proceeds | $								$ 400,000

Equity - Issue and Conversion (

Equity - Issue and Conversion (Details) - USD ($)					12 Months Ended
	Nov. 06, 2023	Jun. 26, 2023	Mar. 29, 2023	Apr. 20, 2020	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020	Jun. 28, 2023	Dec. 31, 2016
Total cost of offering	$ 393,000	$ 215,000
Placement agent fee (as a percent)	6%	6%
Proceeds from issuance of common stock, net of issuance costs					$ 7,500,000	$ 1,780,000
June 2023 Private Placement
Gross proceeds from common stock sale							$ 2,600,000
Expiration term of warrant		5 years
ATM Agreement
Aggregate number of common stock sold (Shares)					308,930	111,234
Aggregate value of securities allowed under agreement			$ 10,000,000					$ 3,000,000	$ 5,000,000
Sale price (in dollars per shares)					$ 6.19	$ 7.03
Proceeds from issuance of common stock, net of issuance costs					$ 1,839,000	$ 754,000
Amortization of deferred cost					45,000	25,000
Unamortized deferred cost					$ 0	$ 45,000
Aggregate securities allowed under agreement (in shares)									10,000,000
Commission rate (as a percent)			3%
Common Stock | June 2023 Private Placement
Warrants to purchase common stock				450,000
Aggregate number of common stock sold (Shares)				600,000
Common Stock | June 2023 Private Placement | Series A Warrants
Warrants to purchase common stock				300,000
Common Stock | June 2023 Private Placement | Series B Warrants [Member]
Warrants to purchase common stock				150,000

Equity - Non-Option Incentive (

Equity - Non-Option Incentive (Details)		12 Months Ended
	May 26, 2023 shares	Dec. 31, 2023 USD ($) employee $ / shares shares	Dec. 31, 2022 USD ($) employee $ / shares shares
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $		$ 405,000	$ 744,000
Restricted Stock
Number of Shares - Non-option
Outstanding at beginning of period (in shares)		19,800	11,733
Granted during the period (in shares)			22,000
Restrictions lifted during the period (in shares)		(12,933)	(13,933)
Number of Employees Resigned | employee		1
Forfeited during the period (in shares)		(1,067)
Outstanding at end of period (in shares)		5,800	19,800
Weighted Average Grant Date Fair Value Per Share - Non-option
Outstanding at beginning of year (in dollars per share) | $ / shares		$ 10.95	$ 15.26
Granted during the period (in dollars per share) | $ / shares			9.41
Restrictions lifted during the period (in dollars per share) | $ / shares		11.97	12.14
Forfeited during the period (in dollars per share) | $ / shares		9.75
Outstanding at end of year (in dollars per share) | $ / shares		$ 8.89	$ 10.95
Restrictions lifted during the year (in shares)		12,933	13,933
Awards surrendered (in shares)		1,067
Restricted Stock | Employees
Number of Shares - Non-option
Restrictions lifted during the period (in shares)		(12,933)	(13,933)
Weighted Average Grant Date Fair Value Per Share - Non-option
Restrictions lifted during the year (in shares)		12,933	13,933
Number of employees | employee			9
Restricted Stock Units (RSUs)
Number of Shares - Non-option
Outstanding at beginning of period (in shares)		232,409	164,409
Granted during the period (in shares)		40,000	68,000
Outstanding at end of period (in shares)		272,409	232,409
Weighted Average Grant Date Fair Value Per Share - Non-option
Outstanding at beginning of year (in dollars per share) | $ / shares		$ 15.06	$ 17.20
Granted during the period (in dollars per share) | $ / shares		1.62	9.90
Outstanding at end of year (in dollars per share) | $ / shares		$ 13.09	$ 15.06
Units | Officers
Number of Shares - Non-option
Outstanding at beginning of period (in shares)		188,000
Outstanding at end of period (in shares)		168,000	188,000
Number of shares issued upon retirement of an officer		44,935
Number of shares relinquished to cover withholding taxes		18,265
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $		$ 7,000	$ 176,000
Equity Incentive Plan
Number of Shares - Non-option
Stock Plan Reserve Shares	360,000
Equity Incentive Plan | Restricted Stock
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $		$ 83,000	$ 207,000
Equity Incentive Plan | Restricted Stock | Employees
Number of Shares - Non-option
Percentage of awards which will vest on each of the first, second and third anniversaries of the grant date			0.3333%
Equity Incentive Plan | Restricted Stock Units (RSUs)
Weighted Average Grant Date Fair Value Per Share - Non-option
Number of unrestricted shares Director to receive for vested RSU upon termination from board		1
2023 Plan | Restricted Stock Units (RSUs)
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $		$ 329,000	$ 361,000
Restricted Stock | Equity Incentive Plan | Employees
Number of Shares - Non-option
Granted during the period (in shares)			20,000
Weighted Average Grant Date Fair Value Per Share - Non-option
Number of employees | employee			9
Restricted Stock | Equity Incentive Plan | New Employee [Member]
Number of Shares - Non-option
Granted during the period (in shares)			2,000
Percentage of awards which will vest on each of the first, second and third anniversaries of the grant date			0.3333%

Equity - Warrants (Details)

Equity - Warrants (Details) - USD ($)					12 Months Ended
	Nov. 06, 2023	Jun. 26, 2023	Apr. 20, 2020	Jul. 17, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of Underlying Shares
Outstanding, beginning balance (in shares)					392,155	512,155
Outstanding, end balance (in shares)					11,308,314	392,155	512,155
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share)					$ 8.58	$ 8.62
Outstanding, end balance (in dollars per share)					$ 1.09	$ 8.58	$ 8.62
June 2023 pre-funded warrants
Number of Underlying Shares
Granted during the period (in shares)					637,587
Exercised during period (in shares)					(637,587)
Weighted Average Exercise Price Per Share
Granted (in dollars per share)					$ 0.0001
Exercised during period (in dollar per share)					0.0001
Outstanding, end balance (in dollars per share)					$ 0.0001
June 2023 warrants
Number of Underlying Shares
Granted during the period (in shares)					1,427,587
Outstanding, end balance (in shares)					1,427,587
Weighted Average Exercise Price Per Share
Granted (in dollars per share)					$ 1.90
Outstanding, end balance (in dollars per share)					$ 1.90
April 2020
Number of Underlying Shares
Outstanding, end balance (in shares)					11,308,314
July 2019 Series A warrants
Number of Underlying Shares
Outstanding, end balance (in shares)					338,155
Weighted Average Exercise Price Per Share
Exchanged during the period (in dollar per share)				$ 8.75
Outstanding, end balance (in dollars per share)					$ 8.75
July 2019 Series B warrants
Number of Underlying Shares
Outstanding, beginning balance (in shares)						120,000
Granted during the period (in shares)						(120,000)
Exercised during period (in shares)						120,000	60,000
Outstanding, end balance (in shares)							120,000
Exchanged during period (in shares)				180,000
Weighted Average Exercise Price Per Share
Exercised during period (in dollar per share)						$ 8.75
Exchanged during the period (in dollar per share)				$ 8.75
Outstanding, end balance (in dollars per share)					$ 8.75
Warrants Exercise Period				6 months
Net proceeds						$ 1,100,000	$ 500,000
April 2020 Series A warrants
Number of Underlying Shares
Outstanding, end balance (in shares)					44,000
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)					$ 7.50
April 2020 Series B warrants
Number of Underlying Shares
Outstanding, end balance (in shares)					10,000
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)					$ 7.50
November 2023 Series A Warrants
Number of Underlying Shares
Granted during the period (in shares)					6,000,000
Outstanding, end balance (in shares)					6,000,000
Weighted Average Exercise Price Per Share
Granted (in dollars per share)					$ 0.70
Outstanding, end balance (in dollars per share)					$ 0.70
November 2023 Series B Warrants
Number of Underlying Shares
Granted during the period (in shares)					3,000,000
Outstanding, end balance (in shares)					3,000,000
Weighted Average Exercise Price Per Share
Granted (in dollars per share)					$ 0.70
Outstanding, end balance (in dollars per share)					$ 0.70
November 2023 Pre-Funded Warrants
Number of Underlying Shares
Granted during the period (in shares)					1,287,512
Exercised during period (in shares)					(798,940)
Outstanding, end balance (in shares)					488,572
Weighted Average Exercise Price Per Share
Granted (in dollars per share)					$ 0.0001
Exercised during period (in dollar per share)					0.0001
Outstanding, end balance (in dollars per share)	$ 0.0001				$ 0.0001
Number of common shares which can be purchased with each warrant	1
Net proceeds	$ 79.89
June 2023 Private Placement
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)		$ 1.90
Warrants Exercise Period		6 months
Number of common shares which can be purchased with each warrant		1,427,587
Gross proceeds from common stock sale								$ 2,600,000
June 2023 Private Placement | Series A Warrants
Number of Underlying Shares
Outstanding, beginning balance (in shares)						44,000	100,000
Exercised during period (in shares)							56,000	200,000
Outstanding, end balance (in shares)							44,000	100,000
Weighted Average Exercise Price Per Share
Net proceeds							$ 400,000
June 2023 Private Placement | Series B Warrants [Member]
Number of Underlying Shares
Outstanding, beginning balance (in shares)						10,000	10,000
Exercised during period (in shares)								140,000
Outstanding, end balance (in shares)							10,000	10,000
Registered Offering [Member] | July 2019 Series A warrants
Number of Underlying Shares
Exercised during period (in shares)						8,000
Outstanding, end balance (in shares)					338,155
Weighted Average Exercise Price Per Share
Warrants Exercise Period				6 months
Common shares issuable upon exercise						100,000
Registered Offering [Member] | July 2019 Series B warrants
Weighted Average Exercise Price Per Share
Number of common shares which can be purchased with each warrant				1
Common Stock | June 2023 Private Placement
Weighted Average Exercise Price Per Share
Common shares issuable upon exercise			450,000
Stock issued during period shares new issues (in shares)			600,000
Common Stock | June 2023 Private Placement | Series A Warrants
Weighted Average Exercise Price Per Share
Common shares issuable upon exercise			300,000
Common Stock | June 2023 Private Placement | Series B Warrants [Member]
Weighted Average Exercise Price Per Share
Common shares issuable upon exercise			150,000
Common Stock | Registered Offering [Member] | July 2019 Series A warrants
Weighted Average Exercise Price Per Share
Stock issued during period shares new issues (in shares)				346,155

Common stock warrants - Warrant

Common stock warrants - Warrants outstanding April 2020 (Details) - $ / shares	Dec. 31, 2023	Nov. 06, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	11,308,314		392,155	512,155
Exercise price of warrants (in dollars per share)	$ 1.09		$ 8.58	$ 8.62
July 2019 Series A warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	338,155
Exercise price of warrants (in dollars per share)	$ 8.75
July 2019 Series B warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)				120,000
Exercise price of warrants (in dollars per share)	$ 8.75
April 2020 Series A warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	44,000
Exercise price of warrants (in dollars per share)	$ 7.50
April 2020 Series B warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	10,000
Exercise price of warrants (in dollars per share)	$ 7.50
June 2023 pre-funded warrants
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share)	$ 0.0001
June 2023 warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	1,427,587
Exercise price of warrants (in dollars per share)	$ 1.90
November 2023 Series A Warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	6,000,000
Exercise price of warrants (in dollars per share)	$ 0.70
November 2023 Series B Warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	3,000,000
Exercise price of warrants (in dollars per share)	$ 0.70
November 2023 Pre-Funded Warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	488,572
Exercise price of warrants (in dollars per share)	$ 0.0001	$ 0.0001

Sale of Metals and Related Co_2

Sale of Metals and Related Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Sale of Metals and Related Costs
Sale of metals (Note 17)	$ 12,002	$ 23,285
Costs Applicable to Sales	12,358	17,538
Gold and Silver in Dore [Member]
Sale of Metals and Related Costs
Sale of metals (Note 17)	9,700	23,300
Costs Applicable to Sales	$ 12,000	$ 17,500
Percentage of provisional payment for gold and silver	95%
Term of final payment within shipment date	30 days
Minimum | Gold and Silver in Dore [Member]
Sale of Metals and Related Costs
Provisional payment term of gold and silver	10 days
Maximum | Gold and Silver in Dore [Member]
Sale of Metals and Related Costs
Provisional payment term of gold and silver	12 days

Sale of Metals and Related Co_3

Sale of Metals and Related Costs - Revenue from Concentrate Sales and Slag Sales (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2023 item	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Sale of Metals and Related Costs
Revenue from Contract with Customer, Excluding Assessed Tax		$ 12,002	$ 23,285
Costs Applicable to Sales		12,358	17,538
Concentrate Sales
Sale of Metals and Related Costs
Revenue from Contract with Customer, Excluding Assessed Tax			0
Concentrates containing various amounts of gold, silver, lead and zinc produced
Sale of Metals and Related Costs
Number of different type of concentrates, the entity sell | item	3
Revenue from Contract with Customer, Excluding Assessed Tax		1,400
Costs Applicable to Sales		$ 300
Percentage of provisional payment for gold and silver		90%
Term of final payment within shipment date		60 days
Term after delivery of concentrate to the buyer to determine price of gold and silver		1 month
Concentrates containing various amounts of gold, silver, lead and zinc produced | Minimum
Sale of Metals and Related Costs
Provisional payment term of gold and silver		10 days
Concentrates containing various amounts of gold, silver, lead and zinc produced | Maximum
Sale of Metals and Related Costs
Provisional payment term of gold and silver		12 days
Slag Sales
Sale of Metals and Related Costs
Revenue from Contract with Customer, Excluding Assessed Tax		$ 800	$ 0
Gold and silver contained in the slag
Sale of Metals and Related Costs
Term of final payment within shipment date		30 days
Gold
Sale of Metals and Related Costs
Percentage of provisional payment for gold and silver		95%
Silver
Sale of Metals and Related Costs
Percentage of provisional payment for gold and silver		90%

Interest and Other Expense, Net

Interest and Other Expense, Net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Interest and Other Income (Expense), Net
Interest and other expense	$ 32,000	$ 11,000

Cash Flow Information (Details)

Cash Flow Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows (used in) from operating activities:
Net loss	$ (9,228,000)	$ (9,906,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	530,000	369,000
Accretion of asset retirement obligation	297,000	282,000
Loss on trading securities	9,000	47,000
Gain on sale of assets	(2,150,000)	(125,000)
Stock-based compensation	405,000	744,000
Litigation settlement	250,000
Changes in operating assets and liabilities from continuing operations:
Decrease in inventories, net	511,000	232,000
Increase in value added tax receivable, net	(1,670,000)	(209,000)
Decrease in prepaid expenses and other assets	126,000	37,000
Decrease in other long-term assets	223,000	414,000
Increase in accounts payable and other accrued liabilities	1,183,000	198,000
Decrease in deferred revenue		(1,469,000)
Decrease in other current liabilities	(109,000)	(81,000)
(Decrease) increase in reclamation liability	(195,000)	41,000
Decrease in other long-term liabilities	(94,000)	(231,000)
Net cash used in operating activities	$ (9,912,000)	$ (9,657,000)

Cash Flow Information - Supplem

Cash Flow Information - Supplemental and Non-cash transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash Flow Information
Interest paid	$ 23	$ 9
Deferred equity offering costs amortized	$ 45	$ 25

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($)		1 Months Ended	12 Months Ended
	Dec. 06, 2023	Apr. 30, 2021	Dec. 31, 2023	Dec. 31, 2022
Leases and Purchase Commitments
2024			$ 381,000
2025			286,000
2026			276,000
2027			276,000
2028			276,000
Total			1,495,000
Contingencies
Cash and cash equivalent, frozen bank balance			153,000
Amount awarded to settle the lawsuit	$ 250,000
Accrued liability			250,000
Potential Lawsuit From Unifin Financiera | Threatened Litigation
Contingencies
Cash and cash equivalent, frozen bank balance		$ 153,000
Loss Contingency, Damages Sought			12,500,000
Accrued liability			250,000
Velardea mining concessions
Leases and Purchase Commitments
2024			32,000
2025			32,000
2026			32,000
2027			32,000
2028			32,000
Total			160,000
Lease payments			136,000	$ 107,000
Surface right agreement with local ejido
Leases and Purchase Commitments
2024			91,000
Lease payments			117,000	300,000
El Quevar mining concessions
Leases and Purchase Commitments
2024			30,000
2025			30,000
2026			30,000
2027			30,000
2028			30,000
Thereafter			30,000
Total			150,000
Lease payments			5,000	7,000
Velardea ejido and surface rights
Leases and Purchase Commitments
2024			59,000
2025			59,000
2026			59,000
2027			59,000
2028			59,000
Total			295,000
Rodeo mining concessions
Leases and Purchase Commitments
2024			114,000
2025			114,000
2026			114,000
2027			114,000
2028			114,000
Total			570,000
Rodeo ejido and surface rights
Leases and Purchase Commitments
2024			41,000
2025			41,000
2026			41,000
2027			41,000
2028			41,000
Total			205,000
Rodeo Project
Leases and Purchase Commitments
2024			155,000
Office Building [Member]
Leases and Purchase Commitments
Lease payments			183,000	174,000
Mexican office
Leases and Purchase Commitments
Lease payments			73,000	59,000
Argentina office
Leases and Purchase Commitments
Lease payments			8,000	$ 9,000
Operating Lease Liabilities [Member]
Leases and Purchase Commitments
2024			105,000
2025			10,000
Total			$ 115,000

Segment Information (Details)

Segment Information (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)
Segment Information
Number of reportable segments | segment	2
Revenue	$ 12,002,000	$ 23,285,000
Costs Applicable to Sales	(12,358,000)	(17,538,000)
Depreciation and amortization	(530,000)	(369,000)
Exploration, El Quevar, Velardena and Administrative Expense	(9,847,000)	(16,120,000)
Pre-Tax Income/(Loss)	(9,217,000)	(9,818,000)
Total Assets	$ 14,910,000	14,944,000
Capital Expenditures		52,000
Mexico Operations
Segment Information
Number of reportable segments | segment	1
Revenue	$ 12,002,000	23,285,000
Costs Applicable to Sales	(12,358,000)	(17,538,000)
Depreciation and amortization	(517,000)	(319,000)
Exploration, El Quevar, Velardena and Administrative Expense	(3,676,000)	(8,521,000)
Pre-Tax Income/(Loss)	(3,071,000)	(2,212,000)
Total Assets	8,376,000	8,425,000
Capital Expenditures		44,000
Corporate, Exploration and Other
Segment Information
Depreciation and amortization	(13,000)	(50,000)
Exploration, El Quevar, Velardena and Administrative Expense	(6,171,000)	(7,599,000)
Pre-Tax Income/(Loss)	(6,146,000)	(7,606,000)
Total Assets	$ 6,534,000	6,519,000
Capital Expenditures		$ 8,000

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Minera Inde
Related Party Transaction
Monthly charges received	$ 15,000
Other operating income	$ 230,000	$ 222,000
Sentient Loan | The Sentient Group
Related Party Transaction
Ownership (as a percent)	11%
Shares issued	14.1
Shares outstanding	14.1

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Jan. 01, 2024	Dec. 06, 2023	Mar. 11, 2024	Mar. 08, 2024	Dec. 31, 2023	Nov. 06, 2023	Dec. 31, 2022	Dec. 31, 2021
Subsequent Event
Amount awarded to settle the lawsuit		$ 250,000
Exercise price of warrants (in dollars per share)					$ 1.09		$ 8.58	$ 8.62
Purchase price					$ 1.09		$ 8.58	$ 8.62
November 2023 Offering
Subsequent Event
Number of shares to be sold						4,712,488
Series B Warrants | November 2023 Offering
Subsequent Event
Exercise price of warrants (in dollars per share)						$ 0.70
Warrants to purchase common stock						3,000,000
Purchase price						$ 0.70
Subsequent Event
Subsequent Event
Number of shares to be sold			1,900,000
Number of common shares which can be purchased with each warrant				488,572
Exercise price of warrants (in dollars per share)				$ 0.0001
Purchase price				$ 0.0001
Subsequent Event | Mexican Tax Authority [Member]
Subsequent Event
Proceeds from VAT Refunds	$ 2,100,000

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ (9,228)	$ (9,906)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2023
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