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Sleeper Gold Project and Other Nevada Based Projects Mineral Properties One-time legal and commissions related to ATM Program One-time legal and commissions related to ATM program One-time legal and commissions related to ATM program. Convertible senior notes interest rate Debt Instrument, Interest Rate, Stated Percentage Entity Shell Company Entity Shell Company Contractual Obligation, Total Total consideration payable Contractual Obligation Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Option Agreement Option Agreement [Member] Option agreement member. Common Stock, Shares, Issued, Total Capital stock, shares issued Common stock, shares issued Common Stock, Shares, Issued Net proceeds from issuance or sale of equity. 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Aggregate Purchase Price of Debenture Aggregate purchase price of debenture Other Expenses [Member] Other Expense [Member] Entity Filer Category Entity Filer Category Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Total Liabilities and Stockholders' Equity Liabilities and Equity Debt Instrument [Line Items] Debt Instrument [Line Items] Current Debt Long-Term Debt, Current Maturities Current Debt Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Exercise Price, Options, Exercisable at December 31, 2025 Bridge Promissory Note Bridge Promissory Note [Member] Bridge Promissory Note. Convertible note, interest payment Debt Instrument, Frequency of Periodic Payment Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Summary of Fair Value of Liabilities Measured at Fair Value on Recurring Basis Second Anniversary Second anniversary. Second Anniversary [Member] Stock Issued During Period, Shares, Exercise of Stock Options, or Vesting of RSUs and Restricted Stock Stock issued during period, shares, exercise of stock options, or vesting of rsus and restricted stock. Capital issued for exercise of stock options, or vesting of RSUs and restricted stock (in shares) Sleeper and Other Nevada Based Projects Sleeper And Other Nevada Based Projects [Member] Sleeper and other Nevada based projects. Weighted-average inflation rate Weighted Average Inflation Rate Weighted-Average Inflation Rate Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments and contingencies. Proceeds from Convertible Debt Proceeds from royalty convertible debenture Accretion expense Accretion Accretion expense Derivative Liability, Measurement Input Value of input used to measure derivative royalty Geographical Geographical [Domain] Non-Current Assets Assets, Noncurrent [Abstract] Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid in capital Additional Paid in Capital, Common Stock Nevada NEVADA Interest rate of loan Debt Instrument, Interest Rate During Period Weighted-Average Grant-Date Fair Value [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Significant Accounting Policies Significant Accounting Policies [Text Block] Measurement Input, Risk Free Interest Rate [Member] Risk-Free Rate BLM and NDEP BLM and the Nevada State Department of Environmental Protection [Member] BLM and the Nevada State Department of Environmental Protection. Vesting Vesting [Domain] Purchase of mineral properties. Payment To Acquire Mineral Properties Purchase of mineral properties Non-vested Options, Granted Options, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Non-vested Options, Granted Interest expense. Interest Expense [Table] Shares Average Price of $1.16 Share Average Price Of One Point One Six [Member] Share average price of one point one six. Investment, Name [Axis] Earnings Per Share, Basic, Total Basic Earnings Per Share, Basic Options, Outstanding, Beginning balance Options, Outstanding, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Non-vested Weighted Average Grant Date Fair Value, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Directors' compensation Director Fee 2019 Secured Convertible Notes Two Thousand Nineteen Senior Secured Convertible Notes [Member] Two thusand nineteen senior secured convertible notes Total Current Liabilities Liabilities, Current Options [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Payments of Debt Issuance Costs Royalty convertible debenture issuance costs Payments to Acquire Machinery and Equipment Purchase of equipment Purchase of equipment Stockholders' Equity Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit) Accumulated deficit Accretion expense Accretion Expense Sale of Stock, Price Per Share Purchase price Grassy Mountain and Other Oregon Based Projects Grassy Mountain And Other Oregon Based Projects [Member] Grassy Mountain and other Oregon based projects. Amortization of debt issuance costs term of Debenture Amortization of debt issuance costs term of debenture. Amortization of debt issuance costs term of debenture Amendment Flag Amendment Flag Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Purchase of the Frost Project Purchase of the Frost Project Common Stock Common Stock [Member] Principal amount per notes Aggregate Price Per Debt Instrument Aggregate price per debt instrument Weighted Average Exercise Price, Options, Granted Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercise price of options granted Description of Business and Summary of Significant Accounting Policies Business Description and Accounting Policies [Text Block] Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Entity Address, Address Line One Entity Address, Address Line One Fair Value Hierarchy and NAV [Axis] Fair value measurements cumulative present value of royalty. Fair value measurements cumulative present value of royalty Cumulative present value of royalty Loss per Common Share Earnings Per Share [Abstract] Debt instrument carrying amount, current. 2019 Secured Convertible Notes, Current Convertible debt accrued interest rate. Convertible debt accrued interest rate Reclamation expenses. Reclamation Expenses Reclamation Mineral Properties [Table] Mineral Properties [Table] Mineral properties. Gross proceeds from issuance of common stock and warrants Gross Proceeds From Issuance Or Sale Of Equity Gross proceeds from issuance or sale of equity. Gross proceeds from sale of common stock under ATM program Class of Warrant or Right [Axis] Total consideration paid Payments For Contractual Obligation Payments for contractual obligation. Document Type Document Type Fair value of shares granted and issued for equity compensation plans Fair Value Of Shares Granted and Issued For Equity Compensation Plans Fair value of shares granted and issued for equity compensation plans. Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Reclamation bonds Commutation account and reclamation bonds Reclamation Bond Noncurrent Noncurrent bond posted used to reimburse reclamation costs and indemnity claims paid by the Company. Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Entity Central Index Key Entity Central Index Key Sharebased compensation arrangement by sharebased payment award options forfeited or expired weighted average remaining contractual term. Sharebased Compensation Arrangement By Sharebased Payment Award Options Forfeited Or Expired Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term (Years), Options, Forfeited or expired Change in cash during period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Fair Value Adjustment of Warrants Change in fair value of warrant Loss from change in fair value of warrant liability Interest Income, Operating, Total Interest Income, Operating Interest income Interest income Capital stock, par value Common stock, par value Common Stock, Par or Stated Value Per Share Reclamation and Environmental Environmental Loss Contingency Disclosure [Text Block] Warrants Warrants [Text Block] Warrants. Liabilities Liabilities [Abstract] Weighted Average Remaining Contractual Term (Years), Options, Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Reclamation and environmental obligation, current Asset Retirement Obligation, Current Reclamation and environmental obligation, current portion Asset Retirement Obligation, Current, Ending Balance Asset Retirement Obligation, Current, Beginning Balance Weighted-average credit adjusted risk free rate Financial Guarantee Insurance Contract, Claim Liability, Weighted-Average Risk-Free Discount Rate Nonmonetary Transaction By Type [Table] Nonmonetary Transaction, by Type [Table] Corporate Segment and Other Operating Segment [Member] Corporate and Other Debt Instruments [Abstract] Options, Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Non-vested Options, Beginning balance Non-vested Options, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares Prepaid expenses and deposits Other Prepaid Expense, Current Debt Disclosure [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Accrued Interest Accrued Interest [Member] Accrued interest member Number of mining fields Business Combination, Number of Businesses Acquired Document Quarterly Report Document Quarterly Report Capital issued for payment of interest (in shares) Stock Issued During Period Shares Payment Of Interest Accrued Stock issued during period, shares, payment of interest accrued. Entity Address, State or Province Entity Address, State or Province Outstanding RSUs, Ending Balance Outstanding RSUs, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Threshold consecutive trading days for convertible debt Debt Instrument, Convertible, Threshold Consecutive Trading Days Investment, Name [Domain] Oregon OREGON Class of Warrant or Right [Domain] Geographical Geographical [Axis] Asset Retirement Obligation Disclosure [Abstract] Professional fees Professional Fees Interest Expense, Operating Total interest expense Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Less: unamortized discount and issuance costs, Non-Currrent Measurement Input, Expected Term [Member] Term Other Liability, Current, Related Party [Extensible Enumeration] Interest expense Interest Expense Income Interest expense income. Total fair value of share based compensation arrangements vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Payment to purchase net profit interest. Payment To Purchase Net Profit Interest Payment to purchase net profit interest Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Number of Reportable Segments Not Disclosed Flag Number of reportable segments not disclosed flag Number of reportable segments not disclosed flag DLOM rate DLOM rate Grassy Mountain Project and Other Oregon Based Projects Mineral Properties [Member] Grassy mountain project and other Oregon based projects mineral properties., member. Grassy Mountain Project and Other Oregon Based Projects Mineral Properties 2019 Secured Convertible Notes Convertible Debt, Current 2019 convertible notes Loan maturity date Debt Instrument, Maturity Date Minimum Minimum [Member] Minimum [Member] Outstanding RSUs, Weighted average grant date fair value, Granted Financial Instrument [Axis] Current Assets Assets, Current [Abstract] Notes Payable Related Parties Notes payable related parties. Notes payable, related party Fair Value, Inputs, Level 3 [Member] Level 3 Liabilities Liabilities, Fair Value Disclosure [Abstract] Segment Reporting [Abstract] Carrying Values of Mineral Properties Mineral Properties, Net, Total Mineral properties Total mineral properties Fair Value of Financial Assets Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Current Liabilities Liabilities, Current [Abstract] Share based compensation arrangement by share based payment award options exercised weighted average remaining contractual term. Sharebased Compensation Arrangement by Sharebased Payment Award Options Exercised Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term (Years), Options, Exercised Third anniversary. Third Anniversary [Member] Third Anniversary Other Income Other income Other income Total Commitments and Contingencies Commitments and Contingencies (Note 11) Outstanding RSUs, Weighted average grant date fair value, Ending Balance Outstanding RSUs, Weighted average grant date fair value, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Non-Cash Transactions Nonmonetary Transactions Disclosure [Text Block] Fair value of shares issued Fair Value Of Shares Issued Fair value of shares issued. Ausenco Ausenco [Member] Ausenco. Asset Retirement Obligation, Cash Paid to Settle Settlement of asset retirement obligations Non-Current Liabilities Liabilities, Noncurrent [Abstract] A 4.74 Year. A 474 Year [Member] A 4.74 Year Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net Loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Debt instrument covenant cash balance. Debt Instrument Covenant Cash Balance Convertible note, covenant cash balance Weighted Average Number of Shares Outstanding, Basic, Total Basic Weighted Average Number of Shares Outstanding, Basic Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Aggregate Intrinsic Value, Options, Exercisable at March 31, 2026 Amortization of debt discount interest expense term Amortization Of Financing Costs And Discounts Interest Expense Term Amortization of financing costs and discounts interest expense term. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Segments Segments [Axis] Proceeds from warrant private placement Proceeds from Issuance of Private Placement Subsequent Events Subsequent Events [Text Block] Non-Current Debt Long-Term Debt Total Stockholders' Equity Balance Balance Equity, Attributable to Parent Schedule of Variables of Weighted Average Schedule of Variable Interest Entities [Table Text Block] Interest Income and Interest Expense Disclosure [Table Text Block] Components of Recorded Interest Expense Basis of Presentation and Preparation Basis of Accounting, Policy [Policy Text Block] Statement of Stockholders' Equity [Abstract] Grassy Mountain Project and other Oregon based Projects Grassy Mountain Project And Other Oregon Based Projects [Member] Grassy mountain project and other oregon based projects. Fair Value Measurements Reclamation and Environmental Obligation Fair value measurements reclamation and environmental obligation. Reclamation and environmental obligation Service Condition Service Condition [Member] Service condition. Summary of Status of Non-Vested Options Schedule of Nonvested Share Activity [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Product Information [Line Items] Product Information [Line Items] Seabridge Gold Inc. Seabridge Gold Inc Member Seabridge Gold Inc. Shares [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Debt Instrument, Name Debt Instrument, Name [Domain] Measurement Input, Discount Rate [Member] Payment discount rate Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Plan Name Plan Name [Domain] Number of senior secured convertible notes converted Number Of Senior Secured Convertible Notes Converted Number of senior secured convertible notes converted. Environmental Remediation Obligations [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Percentage of outstanding common stock Equity Method Investment, Ownership Percentage Fair value measurements conversion threshold value. Fair value measurements conversion threshold value Conversion threshold value Class of Warrant or Right, Outstanding Warrants outstanding Fair value of warrant liability Fair value of warrant liability. Warrant liability Fair value of warrants Related Party Related and Nonrelated Parties [Axis] Entity Address, City or Town Entity Address, City or Town Class Of Warrant Or Right, Exercised Class Of Warrant Or Right, Exercised Warrant exercised Annual gross royalty value rate. Annual gross royalty value rate Annual gross royalty value rate Annual gross royalty amounts, rate Number of reportable segments Number of Reportable Segments Security Exchange Name Security Exchange Name Risk-Free Rate [Member] RiskFreeRate Risk Free Rate Long-Term Debt, Gross 2019 Secured Convertible Notes, Non-Current Affiliate Shareholder Affiliate Shareholder [Member] Affiliate shareholder. Rate of right to reduce net smelter royalty by parent Rate Of Right To Reduce Net Smelter Royalty By Parent Rate of right to reduce net smelter royalty by parent. Counterparty Name Counterparty Name [Axis] Stock Issued During Period, Value, Exercise of Stock Options, or Vesting of RSUs and Restricted Stock Stock issued during period, value, exercise of stock options, or vesting of rsus and restricted stock. Capital issued for exercise of stock options, or vesting of RSUs and restricted stock Other Expense (Income) Nonoperating Gains (Losses) [Abstract] Non-vested Options, Forfeited or expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Measurement Input Type [Domain] Non-vested Weighted Average Grant Date Fair Value, Forfeited or expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Warrants [Line Items] Warrants. Reclamation and environmental obligation, noncurrent Mine Reclamation and Closing Liability, Noncurrent Reclamation and environmental obligation, non-current portion Statistical Measurement Statistical Measurement [Domain] Exercise price of warrants Class of Warrant or Right, Exercise Price of Warrants or Rights Total Current Assets Assets, Current Share-Based Payment Arrangement, Expense Share-based compensation expense Stock based compensation Site Contingency [Line Items] Site Contingency [Line Items] Document Period End Date Document Period End Date Title of Individual Title and Position [Axis] Fair Value Hierarchy and NAV [Domain] Nonmonetary Transaction [Line Items] Nonmonetary Transaction [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Options, Exercisable at December 31, 2025 Statement of Financial Position [Abstract] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Environmental Remediation Site Environmental Remediation Site [Axis] Vesting Vesting [Axis] Percentage of mining claim rights acquired Percentage Of Mining Claim Rights Acquired Percentage of mining claim rights acquired. Aggregate Intrinsic Value, Options, Forfeited or expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Intrinsic Value Schedule of Change in Asset Retirement Obligation [Table Text Block] Changes to Reclamation and Environmental Costs Total Liabilities Liabilities Loss from change in fair value of derivative liability Loss from change in fair value of derivative liability Loss from change in fair value of derivative liability Financial Instruments [Domain] Weighted average remaining contractual term (in years), grants Share Based Compensation Arrangement By Share Based Payment Award Options Grants Weighted Average Remaining Contractual Term Share based compensation arrangement by share based payment award options grants weighted average remaining contractual term. Related party transaction, payments made Related Party Transaction Payments Made Related party transaction, payments made. Asset Retirement Obligations, Noncurrent, Total Asset Retirement Obligations, Noncurrent Non current portion of reclamation and environmental obligation reallocated Debt instrument discount rate. Debt Instrument Discount Rate Debenture discount rate Restricted Stock [Member] Restricted Stock Diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Entity File Number Securities Act File Number Annual royalty value long term stock market rate of return. Annual royalty value long term stock market rate of return Annual royalty value long term stock market rate of return Prefunded Warrants Prefunded Warrants [Member] Prefunded warrants. Reclamation and environmental obligation. Reclamation And Environmental Obligation Reclamation and environmental obligations Cover [Abstract] Cover Measurement Input Type [Axis] Outstanding RSUs, Forfeited Outstanding RSUs, Forfeited Change in derivative liability on royalty convertible debenture Change in derivative liability on royalty convertible debenture Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net, Total Change in derivative liability Change in derivative liability Mineral Properties [Line Items] Mineral Properties [Line Items] Mineral properties. Mineral Properties By Name Of Property Mineral Properties By Name Of Property [Domain] Mineral properties by name of property. Derivative liability of royalty convertible debenture Derivative Liability Of Royalty Convertible Debenture Derivative liability of royalty convertible debenture Segmented Information Segment Reporting Disclosure [Text Block] General and Administrative Expense, Total General and administrative General and Administrative Expense Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Adjustments to reconcile net loss to net cash used in operations: Non-vested Options, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total Options, Forfeited or expired Options, Forfeited or expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Stock based compensation (in shares) Shares of common stock issued under equity compensation plans Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Conversion price Debt Instrument, Convertible, Conversion Price Non-vested Weighted Average Grant Date Fair Value, Beginning balance Non-vested Weighted Average Grant Date Fair Value, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Granted and Issued in Period Share-based compensation arrangement by share-based payment award, equity instruments other than options, granted and issued in period. Restricted Stock granted and issued under equity compensation plan Nature of Operation, Product Information, Concentration of Risk [Table] New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Settlements Asset Retirement Obligation, Liabilities Settled Depreciation Depreciation Depreciation, Total Net proceeds from repayment of debt and transaction costs Proceeds from (Repayments of) Debt, Total Proceeds from (Repayments of) Debt Fair value measurements royalty conversion option value. Fair Value Measurements Royalty Conversion Option Value Royalty conversion option value Royalty conversion feature Convertible note, stock price trigger (in dollars per share) Debt Instrument, Convertible, Stock Price Trigger Corporate Segment [Member] Corporate On-time legal expenses and commissions related to the ATM program On Time Legal Expenses And Commissions Related To The ATM Program On time legal expenses and commissions related to the ATM program. Capital stock, shares outstanding Common stock, shares outstanding Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Document Transition Report Document Transition Report Total Expenses Operating Expenses Stock Issued During Period Value Private Placement Stock issued during period value private placement. Capital issued for financing, net of share issuance costs Proceeds from debenture. Proceeds From Debenture Proceeds from debenture Statement of Cash Flows [Abstract] Capital Stock Equity [Text Block] Dividend Yield Measurement Input, Expected Dividend Rate [Member] Summary of RSUs Activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Net Income (Loss) Attributable to Parent, Total Net loss Net Loss Share Based Compensation Reversal Of Expense For Forfeited Awards Share based compensation reversal of expense for forfeited awards. Reduction in share-based compensation due to forfeited RSUs Aggregate Intrinsic Value, Options, Beginning Outstanding Aggregate Intrinsic Value, Options, Ending Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Operating lease, payments Operating Lease, Payments Annual lease payment, year two Lessee Operating Lease Liability Payments Due Two Thousand Nineteen Lessee operating lease liability payments due two thousand nineteen. Additions and change in estimates Asset Retirement Obligation, Revision of Estimate Assets Assets [Abstract] Amortization of Debt Issuance Costs and Discounts, Total Amortization of Debt Issuance Costs and Discounts Amortization of debt issuance costs Amortization of debt discount and issuance costs Document Fiscal Year Focus Document Fiscal Year Focus Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Warrants [Abstract] Warrants. Interest Expense, Long-Term Debt and Capital Securities, Total Interest Expense, Long-Term Debt and Capital Securities Interest expense Debt Conversion, Converted Instrument, Amount Convertible debenture amount Annual lease payment, thereafter Lessee Operating Lease Liability Payments Due After Two Thousand Nineteen Lessee operating lease liability payments due after two thousand nineteen. Third parties [Member] Third Parties Third parties. Capital issued for payment of interest Stock Issued During Period Value Payment Of Interest Accrued Stock issued during period, value, payment of interest accrued. Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Director and Affiliate Shareholder Director and Affiliate Shareholder [Member] Director and affiliate shareholder. Debt Instrument Debt Instrument [Axis] Share-Based Payment Arrangement [Abstract] Total unamortized compensation cost related to non-vested share based compensation Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Title of 12(b) Security Title of 12(b) Security Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Debt Conversion, Converted Instrument, Rate Convertible debenture interest rate Amortization of Issuance Costs on Royalty Convertible Debenture Amortization of issuance costs on royalty convertible debenture. Amortization of issuance costs on Royalty Convertible Debenture Outstanding RSUs, Weighted average grant date fair value, Forfeited Related Party Related and Nonrelated Parties [Domain] Interest Expense [Member] Interest Accrued Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Effect of changes in operating working capital items: Weighted Average Exercise Price, Options, Outstanding, Beginning balance Weighted Average Exercise Price, Options, Outstanding, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Fair Value, Recurring and Nonrecurring [Table] Payment to reduce NSR by parent Payments to Acquire Mineral Rights Additional Paid-In Capital Additional Paid-in Capital [Member] Measurement Frequency [Domain] Income Statement Location Statement of Income Location, Balance [Axis] Trading Symbol Trading Symbol Director Director [Member] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities Fair Value, Recurring [Member] Fair Value, Recurring A 6.74 year [Member] A6.74year A 6.74 year Net debt liability of royalty convertible debenture. Net Debt Liability Of Royalty Convertible Debenture Net debt liability of royalty convertible debenture Net debt liability of royalty convertible debenture Debt liability of royalty convertible debenture, net Mineral Industries Disclosures [Abstract] Equity Components Equity Components [Axis] Stock Issued During Period Shares Private Placement Stock issued during period shares private placement. Capital issued for financing, net of share issuance costs Sleeper Gold Project and other Nevada based Projects Sleeper Gold Project And Other Nevada Based Projects [Member] Sleeper gold project and other nevada based projects. Equity Component Equity Component [Domain] Summary of Stock Option Activity Under Stock Incentive and Compensation Plans Share-Based Payment Arrangement, Activity [Table Text Block] Derivative, Fair Value, Net, Total Derivative, Fair Value, Net Derivative fair value net Fair value of derivative Debt liability of royalty convertible debenture before issuance costs Debt Liability Of Royalty Convertible Debenture Before Issuance Costs Debt liability of royalty convertible debenture before issuance costs Measurement Input, Option Volatility [Member] Volatility Area covered by mining claims Area Of Mining Fields Area of mining fields. Going concern. Going Concern [Text Block] Going Concern Maximum Maximum [Member] Liabilities, Fair Value Disclosure Liabilities, Fair Value Statistical Measurement Statistical Measurement [Axis] Site Contingency [Table] Site Contingency [Table] Weighted Average Exercise Price, Options, Exercised Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock, par value $0.01, 200,000,000 authorized shares, 85,784,381 issued and outstanding at March 31, 2026 and 200,000,000 authorized shares, 75,420,743 issued and outstanding at June 30, 2025 Aggregate Intrinsic Value, Options, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value Stock based compensation Stock Issued During Period, Value, Employee Benefit Plan Senior Management Senior Management [Member] Senior management member Debt instrument, covenant description Debt Instrument, Covenant Description 2015 and 2016 Stock Incentive and Compensation Plans Two Thousand Fifteen And Two Thousand Sixteen Stock Incentive And Stock Compensation Plan [Member] Two thousand fifteen and two thousand sixteen stock incentive and stock compensation plan. Sleeper Gold Project Sleeper Gold Mine [Member] Sleeper Gold Mine. Royalty Expense Payment for royalty Term of the agreement Lessor, Operating Lease, Term of Contract Schedule of Debt [Table Text Block] Summary of Debentures Repayments of Convertible Debt Repayment of 2019 convertible notes Debt issuance costs in connection with issuance of debenture. Debt Issuance Costs in Connection With Issuance Of Debenture Debt issuance costs in connection with issuance of debenture Entity Registrant Name Entity Registrant Name Debt Disclosure [Text Block] Debt Environmental Remediation Site Environmental Remediation Site [Domain] Agreed sale price of note Aggregate Offering Price Per Debt Instrument Aggregate offering price per debt instrument. Warrants [Table] Warrants. Subsequent Events [Abstract] Accounts Payable and Accrued Liabilities, Current, Total Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Weighted Average Remaining Contractual Term (Years), Options, Granted Sharebased Compensation Arrangement By Sharebased Payment Award Options Granted Weighted Average Remaining Contractual Term Sharebased compensation arrangement by sharebased payment award options granted weighted average remaining contractual term. Weighted average remaining contractual term (in years), grants Measurement Frequency [Axis] Frost Project Frost Project [Member] Frost Project. Option to purchase mining claims, price Option To Purchase Mining Claims Price Option to purchase mining claims price. Proceeds from Issuance of Common Stock Capital issued for financing, net of share issuance costs Gross proceeds from sale of common stock under ATM program Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Summary of Key Assumptions in Valuing the Royalty Conversion Option Derivative Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] 2019 Convertible Notes 2019 Secured Convertible Notes Twenty Nineteen Convertible Secured Notes [Member] Twenty nineteen convertible secured notes. Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Convertible notes due period Debt Conversion, Original Debt, Due Date, Year Royalty rate Percentage Of Royalty Percentage of royalty. Restricted stock units, Granted Outstanding RSUs, Granted Total Assets Assets Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term (Years), Options, Exercisable at March 31, 2026 Income Statement [Abstract] Payments to Acquire Mining Assets Payment to purchase of Frost Project Capitalized Acquisition Costs on Mineral Properties Mineral Properties Table [Text Block] Tabular disclosure of mineral properties. Disclosure may include type of assets, disposal, depreciation and net amount. Stock Based Compensation Share-Based Payment Arrangement [Policy Text Block] Fair value of shares issued for equity compensation plans. Fair Value of Shares Issued for Equity Compensation Plans Fair value of shares issued for equity compensation plans Aggregate number of units issued (in shares) Number of shares issued Sale of Stock, Number of Shares Issued in Transaction Debenture purchase consideration condition. Debenture Purchase Consideration Condition Debenture purchase consideration condition Outstanding RSUs, Vested Outstanding RSUs, Vested Issued shares upon vesting Mineral Properties By Name Of Property Mineral Properties By Name Of Property [Axis] Mineral properties by name of property. Earnings Per Share, Diluted, Total Diluted Earnings Per Share, Diluted Title of Individual Title and Position [Domain] City Area Code City Area Code Gain (loss) from change in fair value of derivative liability on royalty convertible debenture Gain (loss) from change in fair value of derivative liability on royalty convertible debenture. Loss from change in fair value of derivative liability on royalty convertible debenture Loss from change in fair value of derivative liability on royalty convertible debenture Loss/(gain) from change in fair value of derivative liability on royalty convertible debenture Loss from change in fair value of derivative liability on royalty convertible debenture Grassy Mountain Project Grassy Mountain Project [Member] Grassy Mountain Project. Principal amount of loan Principal amount of convertible notes Debt Instrument, Face Amount Counterparty Name Counterparty Name [Domain] Interest expense. Interest Expense [Line Items] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment Property, Plant and Equipment, Net Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Cash at beginning of period Cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Operating Income (Loss), Total Operating Income (Loss) Net Loss Before Other Expense (Income) Net Loss Before Other Expense (Income) Retained Earnings [Member] Accumulated Deficit Total Non-Current Assets Assets, Noncurrent Total Non-Current Assets Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Table Text Block] Schedule of Expenses and Mineral Property Carrying Values by Material Project Share issuance costs Payments of Stock Issuance Costs Ownership percentage of option to buy back royalty. Ownership Percentage of Option to Buy Back Royalty Ownership percentage of option to buy back royalty Total Non-Current Liabilities Liabilities, Noncurrent Debt instruments unamortized discount premium and debt issuance cost current. Debt Instruments Unamortized Discount Premium and Debt Issuance Cost Current Less: unamortized discount and issuance costs, Current Level 1 Fair Value, Inputs, Level 1 [Member] Cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Notes Payable, Total Notes Payable Notes outstanding Notes Borrowed Unamortized Debt Issuance Expense Less: unamortized issuance costs Less: unamortized issuance costs Deferred Income Tax Liabilities, Net Deferred tax liability Percentage of Net Smelter Royalty Percentage Of Net Smelter Royalty Percentage of net smelter royalty. Entity Interactive Data Current Entity Interactive Data Current Income Statement Location Statement of Income Location, Balance [Domain] A 2.74 year [Member] A2.74year A 2.74 year Non-cash interest expense Paid-in-Kind Interest Capital issued for interest expense Percentage of debenture convertible into gross revenue royalty. Percentage of Debenture Convertible into Gross Revenue Royalty Percentage of debenture convertible into gross revenue royalty Measurement input, expected time period for volatility calculation. Measurement Input, Expected Time Period for Volatility Calculation [Member] Time Period for Volatility Calculation Stock Issued During Period, Shares, Issued for Services Number of shares issued in exchange for services Entity Tax Identification Number Entity Tax Identification Number Repayments of Notes Payable Repayment of notes payable, related parties Local Phone Number Local Phone Number Other Liabilities, Current 2019 convertible notes, related parties Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Common Shares Used in per Share Calculations Exploration and Development Expenses Exploration and development expenses. Exploration and development Accounting Policies [Abstract] Percentage of Net Profit Interest Percentage of Net Profit Interest Land Holding Costs Land holding costs Land Holding Costs Land holding costs. Salaries and benefits Labor and Related Expense Number of options and shares available for grant to employees and directors Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Expected weighted-average period of unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Nevada Nevada Select Royalty Inc [Member] Nevada Select Royalty Inc. [Member] Annual lease payment, year one Lessee Operating Lease Liability Payments Due Two Thousand Eighteen Lessee operating lease liability payments due two thousand eighteen. Entity Emerging Growth Company Entity Emerging Growth Company