Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of presentation These condensed consolidated interim financial statements of the Company have been prepared, without audit, in accordance with U.S. generally accepted accounting principles (“GAAP”) and pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted, pursuant to the rules and regulations of the SEC for interim financial reporting. Accordingly, these financial statements do not include all information and footnotes necessary for a comprehensive presentation of financial position, results of operations, or cash flows. These unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2020. The Company continues to follow the accounting policies set forth in those audited consolidated financial statements. In the opinion of management, the accompanying unaudited condensed consolidated interim financial statements include all adjustments that are necessary for a fair presentation of the Company's interim financial position, operating results and cash flows for the periods presented. Certain reclassifications have been made to the prior periods presented in these financial statements to conform to the current period presentation, which had no effect on previously reported total assets, liabilities, cash flows, or net loss. References to “$” refers to United States currency. Risks and Uncertainties The Company has a single mine with its revenue, profitability, and cash flows substantially dependent on prevailing prices for gold and silver and its ability to mine sufficient volumes cost effectively. Historically, the commodity markets have been very volatile, and there can be no assurance that commodity prices will not be subject to wide fluctuations in the future. A substantial or extended decline in commodity prices could have a material adverse effect on the Company’s financial position, results of operations, cash flows, access to capital and the quantities of reserves that the Company can economically produce. In addition to changes in commodity prices, other factors such as changes in mine plans, increases in costs, geotechnical failures, changes in social, environmental or regulatory requirements, the ability to successfully implement new technologies for processing ore, timely financing for development, impacts of global events such as the COVID-19 pandemic, and management’s decision to expand production to commercial levels can adversely affect the Company’s ability to recover its investment in certain assets and result in impairment charges. For more information on risks associated with the Company’ s business, please see Item 1A. Risk Factors in the 2020 Form 10-K/A. Recapitalization Transaction The Recapitalization Transaction (see Note 3 - Recapitalization Transaction) was accounted for as a reverse recapitalization in accordance with GAAP. Under this method of accounting, for financial reporting purposes, MUDS has been treated as the “acquired” company and Hycroft Mining Corporation (“Seller”) has been treated as the “acquirer”. This determination was primarily based on (1) stockholders of Seller immediately prior to the Recapitalization Transaction having a majority of the voting power of the combined entity; (2) the operations of Seller prior to the Recapitalization Transaction comprising the only ongoing operations of the combined entity; (3) four of the seven members of the Board of Directors immediately following the Recapitalization Transaction were directors of Seller immediately prior to the Recapitalization Transaction; and (4) executive and senior management of Seller were appointed as the senior management of the Company. Based on Seller being the accounting acquirer, the financial statements of the combined entity represent a continuation of the financial statements of Seller, with the acquisition treated as the equivalent of Seller issuing stock for the net assets of MUDS, accompanied by a recapitalization. The net assets of MUDS were recognized at historical cost as of the date of the Recapitalization Transaction, with no goodwill or other intangible assets recorded. Comparative information prior to the Recapitalization Transaction in these financial statements are those of Seller and the accumulated deficit of Seller has been carried forward after the Recapitalization Transaction. The shares and net loss per common share prior to the Recapitalization Transaction have been retroactively restated as shares reflecting the exchange ratio established in the Recapitalization Transaction to effect the reverse recapitalization (1 Seller share for 0.112 HYMC share). See Note 3 - Recapitalization Transaction for additional information. Going concern The financial statements of the Company have been prepared on a “going concern” basis, which contemplates the presumed continuation of the Company even though events and conditions exist that, when considered individually or in the aggregate, raise substantial doubt about the Company’s ability to continue as a going concern because it is probable that, without additional capital injections, the Company may be unable to meet its obligations as they become due within one year after the date that these financial statements were issued. For the three months ended March 31, 2021, the Company recorded a net loss of $9.7 million, which included a gain from Fair value adjustments to warrants of $9.5 million, and net cash used in operating activities was $14.8 million. As of March 31, 2021, the Company had available cash on hand of $36.5 million, working capital of $65.6 million, Total liabilities of $215.4 million, and an Accumulated deficit of $530.4 million. Although the Company completed the Recapitalization Transaction during the second quarter of 2020 and the Public Offering (as defined herein) on October 6, 2020, for proceeds net of discount and equity issuance costs of approximately $83.1 million, based on its internal cash flow projection models, the Company currently forecasts it will likely require additional cash from financing activities in less than 12 months from the issuance of this report to meet its operating and investing requirements and future obligations as they become due, including the estimated $9.1 million in cash payments required pursuant to the Credit Agreement among MUDS, MUDS Holdco Inc., Allied VGH LLC, Hycroft Mining Holding Corporation, Hycroft Resources and Development, LLC, Sprott Private Resource Lending II (Collector) Inc., and Sprott Resources Lending Corp. (“Sprott Credit Agreement”). The Company’s ability to continue as a going concern is contingent upon securing additional funding for working capital, capital expenditures and other corporate expenses so that it can increase sales by achieving higher cost-effective operating tonnages and recovery rates and generate positive free cash flows. These financial statements do not include any adjustments related to the recoverability and classification of recorded assets or the amounts and classification of any liabilities or any other adjustments that might be necessary should the Company be unable to continue as a going concern. As such, recorded amounts in these financial statements (including without limitation, stockholders’ equity) have been prepared in accordance with GAAP on a historical-cost basis, as required, which do not reflect or approximate the current fair value of the Company’s assets or management’s assessment of the Company’s overall enterprise or equity value. Use of estimates The preparation of the Company’s financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in these financial statements and accompanying notes. The more significant areas requiring the use of management estimates and assumptions relate to: recoverable gold and silver on the leach pads and in-process inventories; timing of near-term ounce production and related sales; the useful lives of long-lived assets; probabilities of future expansion projects; estimates of mineral reserves; estimates of life-of-mine production timing, volumes, costs and prices; current and future mining and processing plans; environmental reclamation and closure costs and timing; deferred taxes and related valuation allowances; estimates of the fair value of liability classified warrants, and estimates of fair value for asset impairments and financial instruments. The Company bases its estimates on historical experience and various other assumptions that are believed to be reasonable at the time the estimate is made. Actual results may differ from amounts estimated in these financial statements, and such differences could be material. Accordingly, amounts presented in these financial statements are not indicative of results that may be expected for future periods. Inventories The Company’s production-related inventories include: (i) ore on leach pads; (ii) in-process inventories; and (iii) doré and off-site carbon and slag finished goods. Production-related inventories are carried at the lower of average cost or net realizable value per estimated recoverable gold ounce, which is computed for each category of production-related inventories at each reporting period. Net realizable value represents the estimated future gold revenue of production-related inventories after adjusting for silver by-product revenue and deductions for further processing, refining, and selling costs. The estimated future revenue is calculated using sales prices based on the London Bullion Market Association’s (“LBMA”) quoted period-end metal prices. Estimates for silver revenue by-products credits and deductions for estimated costs to complete reflect the Company’s historical experience for expected processing, refining and selling plans. Actual net realizable values for gold sales may be different from such estimates. Changes to inputs and estimates resulting from changes in facts and circumstances are recognized as a change in Management estimate on a prospective basis. Ore on leach pads Although the quantities of recoverable metal placed on the leach pads are reconciled by comparing the grades of ore placed on pads to the quantities of metal actually recovered (metallurgical balancing), the nature of the leaching process inherently limits the ability to precisely monitor inventory levels. As a result, the metallurgical balancing process is constantly monitored, and estimates are refined based on actual results over time and changes in future estimates. As gold-bearing materials are further processed, costs are transferred from ore on leach pads to in-process inventories at an average cost per estimated recoverable ounce of gold. In-process inventories In-process inventories represent gold-bearing concentrated materials that are in the process of being converted to a saleable product using a Merrill-Crowe plant or carbon-in-column processing method. As gold ounces are recovered from in-process inventories, costs, including conversion costs, are transferred to precious metals inventory at an average cost per ounce of gold. Precious metals inventory Precious metals inventory consists of doré and loaded carbon containing both gold and silver, which is ready for offsite shipment or at a third-party refiner before being sold to a third party. As gold ounces are sold, costs are recognized in Production costs and Depreciation and amortization in the consolidated statements of operations at an average cost per gold ounce sold. Materials and supplies Materials and supplies are valued at the lower of average cost or net realizable value. Cost includes applicable taxes and freight. Warrant liabilities The Company accounts for certain warrants to purchase shares of the Company’s common stock issued to the SPAC sponsor and/or underwriter in a private placement and/or pursuant to a forward purchase contract (the “5-Year Private Warrants”) that are not indexed to the Company’s own stock as warrant liabilities at fair value on the consolidated balance sheet. These warrants are subject to remeasurement at each balance sheet date and any change in fair value is recognized as a component of Other income (expense) on the consolidated statement of operations. The Company will continue to adjust the liability for changes in fair value until the earlier of the (i) exercise or expiration of the 5-Year Private Warrants or (ii) the transfer of any 5-Year Private Warrants to any person who is not a permitted transferee, at which time the warrant liability will be reclassified to Additional paid-in capital on the consolidated balance sheet. Projects and development Costs incurred to enhance our understanding of the recovery and processing of the current ore body to sustain production at existing operations that do not qualify for capitalization are expensed within Projects and development, which is included in Operating expenses on the Condensed Consolidated Statement of Operations. Evaluation and development costs include expenditures for: (i) analyzing established feasibility studies; (ii) conducting geological studies; (iii) oversight and project management; and (4) drilling, engineering, and metallurgical activities. Accounting pronouncements not yet adopted In February 2016, the FASB issued ASU No. 2016-02, Leases ("ASU 2016-02"). The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the consolidated statements of operations and classification within the consolidated statement of cash flows. In October 2019, the FASB issued ASU No. 2019-10, Financial Instruments - Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) ("ASU 2019-10") that amends the effective date of ASU 2016-02 for emerging growth companies, such that the new standard is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. As the Company qualifies as an emerging growth company, the Company has elected to take advantage of the deferred effective date afforded to emerging growth companies. A modified retrospective transition approach is required to either the beginning of the earliest period presented or the beginning of the year of adoption. The Company has compiled its leases and is in the process of estimating the impact of adopting this ASU. In December of 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), as part as part of its overall simplification initiative to reduce costs and complexity of applying accounting standards while maintaining or improving the usefulness of the information provided to users of financial statements. Amendments include removal of certain exceptions to the general principles of ASC 740, Income Taxes and simplification in several other areas such as accounting for a franchise tax (or similar tax) that is partially based on income. For emerging growth companies, the new guidance is effective for annual periods beginning after December 15, 2021. As the Company qualifies as an emerging growth company, the Company plans to take advantage of the deferred effective date afforded to emerging growth companies. The Company is assessing the impact on its consolidated financial statements and disclosures. In August 2020, the FASB issued ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). ASU 2020-06 simplifies guidance on accounting for convertible instruments and contracts in an entity’s own equity including calculating diluted earnings per share. For emerging growth companies, the new guidance is effective for annual periods beginning after December 15, 2022. As the Company qualifies as an emerging growth company, the Company plans to take advantage of the deferred effective date afforded to emerging growth companies. The Company is currently evaluating the impact that adopting this update will have on its consolidated financial statements and related disclosures.

These condensed consolidated interim financial statements of the Company have been prepared, without audit, in accordance with U.S. generally accepted accounting principles (“GAAP”) and pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted, pursuant to the rules and regulations of the SEC for interim financial reporting. Accordingly, these financial statements do not include all information and footnotes necessary for a comprehensive presentation of financial position, results of operations, or cash flows. These unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2020. The Company continues to follow the accounting policies set forth in those audited consolidated financial statements. In the opinion of management, the accompanying unaudited condensed consolidated interim financial statements include all adjustments that are necessary for a fair presentation of the Company's interim financial position, operating results and cash flows for the periods presented.

The Company has a single mine with its revenue, profitability, and cash flows substantially dependent on prevailing prices for gold and silver and its ability to mine sufficient volumes cost effectively. Historically, the commodity markets have been very volatile, and there can be no assurance that commodity prices will not be subject to wide fluctuations in the future. A substantial or extended decline in commodity prices could have a material adverse effect on the Company’s financial position, results of operations, cash flows, access to capital and the quantities of reserves that the Company can economically produce.

In addition to changes in commodity prices, other factors such as changes in mine plans, increases in costs, geotechnical failures, changes in social, environmental or regulatory requirements, the ability to successfully implement new technologies for processing ore, timely financing for development, impacts of global events such as the COVID-19 pandemic, and management’s decision to expand production to commercial levels can adversely affect the Company’s ability to recover its investment in certain assets and result in impairment charges.

The Recapitalization Transaction (see Note 3 - Recapitalization Transaction) was accounted for as a reverse recapitalization in accordance with GAAP. Under this method of accounting, for financial reporting purposes, MUDS has been treated as the “acquired” company and Hycroft Mining Corporation (“Seller”) has been treated as the “acquirer”. This determination was primarily based on (1) stockholders of Seller immediately prior to the Recapitalization Transaction having a majority of the voting power of the combined entity; (2) the operations of Seller prior to the Recapitalization Transaction comprising the only ongoing operations of the combined entity; (3) four of the seven members of the Board of Directors immediately following the Recapitalization Transaction were directors of Seller immediately prior to the Recapitalization Transaction; and (4) executive and senior management of Seller were appointed as the senior management of the Company.

Based on Seller being the accounting acquirer, the financial statements of the combined entity represent a continuation of the financial statements of Seller, with the acquisition treated as the equivalent of Seller issuing stock for the net assets of MUDS, accompanied by a recapitalization. The net assets of MUDS were recognized at historical cost as of the date of the Recapitalization Transaction, with no goodwill or other intangible assets recorded. Comparative information prior to the Recapitalization Transaction in these financial statements are those of Seller and the accumulated deficit of Seller has been carried forward after the Recapitalization Transaction. The shares and net loss per common share prior to the Recapitalization Transaction have been retroactively restated as shares reflecting the exchange ratio established in the Recapitalization Transaction to effect the reverse recapitalization (1 Seller share for 0.112 HYMC share). See Note 3 - Recapitalization Transaction for additional information.

The financial statements of the Company have been prepared on a “going concern” basis, which contemplates the presumed continuation of the Company even though events and conditions exist that, when considered individually or in the aggregate, raise substantial doubt about the Company’s ability to continue as a going concern because it is probable that, without additional capital injections, the Company may be unable to meet its obligations as they become due within one year after the date that these financial statements were issued.

For the three months ended March 31, 2021, the Company recorded a net loss of $9.7 million, which included a gain from Fair value adjustments to warrants of $9.5 million, and net cash used in operating activities was $14.8 million. As of March 31, 2021, the Company had available cash on hand of $36.5 million, working capital of $65.6 million, Total liabilities of $215.4 million, and an Accumulated deficit of $530.4 million. Although the Company completed the Recapitalization Transaction during the second quarter of 2020 and the Public Offering (as defined herein) on October 6, 2020, for proceeds net of discount and equity issuance costs of approximately $83.1 million, based on its internal cash flow projection models, the Company currently forecasts it will likely require additional cash from financing activities in less than 12 months from the issuance of this report to meet its operating and investing requirements and future obligations as they become due, including the estimated $9.1 million in cash payments required pursuant to the Credit Agreement among MUDS, MUDS Holdco Inc., Allied VGH LLC, Hycroft Mining Holding Corporation, Hycroft Resources and Development, LLC, Sprott Private Resource Lending II (Collector) Inc., and Sprott Resources Lending Corp. (“Sprott Credit Agreement”).

The Company’s ability to continue as a going concern is contingent upon securing additional funding for working capital, capital expenditures and other corporate expenses so that it can increase sales by achieving higher cost-effective operating tonnages and recovery rates and generate positive free cash flows.

These financial statements do not include any adjustments related to the recoverability and classification of recorded assets or the amounts and classification of any liabilities or any other adjustments that might be necessary should the Company be unable to continue as a going concern. As such, recorded amounts in these financial statements (including without limitation, stockholders’ equity) have been prepared in accordance with GAAP on a historical-cost basis, as required, which do not reflect or approximate the current fair value of the Company’s assets or management’s assessment of the Company’s overall enterprise or equity value.

The preparation of the Company’s financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in these financial statements and accompanying notes. The more significant areas requiring the use of management estimates and assumptions relate to: recoverable gold and silver on the leach pads and in-process inventories; timing of near-term ounce production and related sales; the useful lives of long-lived assets; probabilities of future expansion projects; estimates of mineral reserves; estimates of life-of-mine production timing, volumes, costs and prices; current and future mining and processing plans; environmental reclamation and closure costs and timing; deferred taxes and related valuation allowances; estimates of the fair value of liability classified warrants, and estimates of fair value for asset impairments and financial instruments. The Company bases its estimates on historical experience and various other assumptions that are believed to be reasonable at the time the estimate is made. Actual results may differ from amounts estimated in these financial statements, and such differences could be material. Accordingly, amounts presented in these financial statements are not indicative of results that may be expected for future periods.

The Company’s production-related inventories include: (i) ore on leach pads; (ii) in-process inventories; and (iii) doré and off-site carbon and slag finished goods. Production-related inventories are carried at the lower of average cost or net realizable value per estimated recoverable gold ounce, which is computed for each category of production-related inventories at each reporting period.

Net realizable value represents the estimated future gold revenue of production-related inventories after adjusting for silver by-product revenue and deductions for further processing, refining, and selling costs. The estimated future revenue is calculated using sales prices based on the London Bullion Market Association’s (“LBMA”) quoted period-end metal prices. Estimates for silver revenue by-products credits and deductions for estimated costs to complete reflect the Company’s historical experience for expected processing, refining and selling plans. Actual net realizable values for gold sales may be different from such estimates. Changes to inputs and estimates resulting from changes in facts and circumstances are recognized as a change in Management estimate on a prospective basis.

Although the quantities of recoverable metal placed on the leach pads are reconciled by comparing the grades of ore placed on pads to the quantities of metal actually recovered (metallurgical balancing), the nature of the leaching process inherently limits the ability to precisely monitor inventory levels. As a result, the metallurgical balancing process is constantly monitored, and estimates are refined based on actual results over time and changes in future estimates. As gold-bearing materials are further processed, costs are transferred from ore on leach pads to in-process inventories at an average cost per estimated recoverable ounce of gold.

In-process inventories represent gold-bearing concentrated materials that are in the process of being converted to a saleable product using a Merrill-Crowe plant or carbon-in-column processing method. As gold ounces are recovered from in-process inventories, costs, including conversion costs, are transferred to precious metals inventory at an average cost per ounce of gold.

Precious metals inventory consists of doré and loaded carbon containing both gold and silver, which is ready for offsite shipment or at a third-party refiner before being sold to a third party. As gold ounces are sold, costs are recognized in Production costs and Depreciation and amortization in the consolidated statements of operations at an average cost per gold ounce sold.

The Company accounts for certain warrants to purchase shares of the Company’s common stock issued to the SPAC sponsor and/or underwriter in a private placement and/or pursuant to a forward purchase contract (the “5-Year Private Warrants”) that are not indexed to the Company’s own stock as warrant liabilities at fair value on the consolidated balance sheet. These warrants are subject to remeasurement at each balance sheet date and any change in fair value is recognized as a component of Other income (expense) on the consolidated statement of operations. The Company will continue to adjust the liability for changes in fair value until the earlier of the (i) exercise or expiration of the 5-Year Private Warrants or (ii) the transfer of any 5-Year Private Warrants to any person who is not a permitted transferee, at which time the warrant liability will be reclassified to Additional paid-in capital on the consolidated balance sheet.

Costs incurred to enhance our understanding of the recovery and processing of the current ore body to sustain production at existing operations that do not qualify for capitalization are expensed within Projects and development, which is included in Operating expenses on the Condensed Consolidated Statement of Operations. Evaluation and development costs include expenditures for: (i) analyzing established feasibility studies; (ii) conducting geological studies; (iii) oversight and project management; and (4) drilling, engineering, and metallurgical activities.

In February 2016, the FASB issued ASU No. 2016-02, Leases ("ASU 2016-02"). The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the consolidated statements of operations and classification within the consolidated statement of cash flows. In October 2019, the FASB issued ASU No. 2019-10, Financial Instruments - Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) ("ASU 2019-10") that amends the effective date of ASU 2016-02 for emerging growth companies, such that the new standard is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. As the Company qualifies as an emerging growth company, the Company has elected to take advantage of the deferred effective date afforded to emerging growth companies. A modified retrospective transition approach is required to either the beginning of the earliest period presented or the beginning of the year of adoption. The Company has compiled its leases and is in the process of estimating the impact of adopting this ASU.

In December of 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), as part as part of its overall simplification initiative to reduce costs and complexity of applying accounting standards while maintaining or improving the usefulness of the information provided to users of financial statements. Amendments include removal of certain exceptions to the general principles of ASC 740, Income Taxes and simplification in several other areas such as accounting for a franchise tax (or similar tax) that is partially based on income. For emerging growth companies, the new guidance is effective for annual periods beginning after December 15, 2021. As the Company qualifies as an emerging growth company, the Company plans to take advantage of the deferred effective date afforded to emerging growth companies. The Company is assessing the impact on its consolidated financial statements and disclosures.

In August 2020, the FASB issued ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”). ASU 2020-06 simplifies guidance on accounting for convertible instruments and contracts in an entity’s own equity including calculating diluted earnings per share. For emerging growth companies, the new guidance is effective for annual periods beginning after December 15, 2022. As the Company qualifies as an emerging growth company, the Company plans to take advantage of the deferred effective date afforded to emerging growth companies. The Company is currently evaluating the impact that adopting this update will have on its consolidated financial statements and related disclosures.