995200100 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 995200200 - Statement - Consolidated Statements of Loss and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - Receivables and Prepayments (Details) link:presentationLink link:calculationLink link:definitionLink 99941103 - Disclosure - Exploration Assets - Exploration and evaluation expenses (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - Accounts Payable and Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99942001 - Disclosure - Financial Instruments - Schedule of categories of financial instruments (Details) link:presentationLink link:calculationLink link:definitionLink 99942402 - Disclosure - Income Taxes - Reconciliation of Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 99942405 - Disclosure - Income Taxes - The Company's deferred income tax assets (liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - Consolidated Balance Sheets (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 995211701 - Disclosure - Common Shares link:presentationLink link:calculationLink link:definitionLink 995211801 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 99920302 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 99931603 - Disclosure - Warrants (Tables) link:presentationLink link:calculationLink link:definitionLink 99931703 - Disclosure - Common Shares (Tables) link:presentationLink link:calculationLink link:definitionLink 99931803 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 99932303 - Disclosure - Segmented Information (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - Nature of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 99940201 - Disclosure - Basis of Presentation - Non controlling interest (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 99940302 - Disclosure - Significant Accounting Policies - Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates - Development of Project Zero Offshore Nodule Collection System (Details) link:presentationLink link:calculationLink link:definitionLink 99940802 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates - Exclusive Vessel Use Agreement with Allseas (Details) link:presentationLink link:calculationLink link:definitionLink 99940803 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates - Right-of-use asset (Details) link:presentationLink link:calculationLink link:definitionLink 99940804 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates - Credit Facility with Allseas Affiliate (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - Investments (Details) link:presentationLink link:calculationLink link:definitionLink 99940902 - Disclosure - Investments - Changes in Investments (Details) link:presentationLink link:calculationLink link:definitionLink 99940903 - Disclosure - Investments - Financial results of The Metals Royalty Company (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - Royalty Liability (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - Exploration Assets (Details) link:presentationLink link:calculationLink link:definitionLink 99941102 - Disclosure - Exploration Assets - Reconciliation of the Company's explorations contracts (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - General and Administrative Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - Financing Activity (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - Shares issued as per At-the-Market Equity Distribution Agreement ("ATM") (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - Warrants - Public and Private Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 99941602 - Disclosure - Warrants - Fair value of warrant liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99941603 - Disclosure - Warrants - Fair value measurements assumptions of Private Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 99941604 - Disclosure - Warrants - Class A, Class B, Class C, Korea Zinc, Nauru and Tonga Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 99941605 - Disclosure - Warrants - Movements in warrants (Details) link:presentationLink link:calculationLink link:definitionLink 99941606 - Disclosure - Warrants - Fair value measurements assumptions of warrants (Details) link:presentationLink link:calculationLink link:definitionLink 99941701 - Disclosure - Common Shares - Schedule of authorized, issued and outstanding common shares and special shares (Details) link:presentationLink link:calculationLink link:definitionLink 99941702 - Disclosure - Common Shares (Details) link:presentationLink link:calculationLink link:definitionLink 99941703 - Disclosure - Common Shares - Special Shares Class (Details) link:presentationLink link:calculationLink link:definitionLink 99941704 - Disclosure - Common Shares - Schedule of common shares (Details) link:presentationLink link:calculationLink link:definitionLink 99941801 - Disclosure - Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 99941802 - Disclosure - Share-Based Compensation - Stock options under Incentive Plan (Details) link:presentationLink link:calculationLink link:definitionLink 99941803 - Disclosure - Share-Based Compensation - Stock options granted and outstanding under Incentive Plan (Details) link:presentationLink link:calculationLink link:definitionLink 99941804 - Disclosure - Share-Based Compensation - Valuation assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 99941805 - Disclosure - Share-Based Compensation - Stock options under STIP and LTIP (Details) link:presentationLink link:calculationLink link:definitionLink 99941806 - Disclosure - Share-Based Compensation - Schedule of company's stock options granted and outstanding under the STIP (Details) link:presentationLink link:calculationLink link:definitionLink 99941807 - Disclosure - Share-Based Compensation - Summary of the RSU activity (Details) link:presentationLink link:calculationLink link:definitionLink 99941808 - Disclosure - Share-Based Compensation - Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 99941809 - Disclosure - Share-Based Compensation - Fair value of each tranche and the derived service period (Details) link:presentationLink link:calculationLink link:definitionLink 99941810 - Disclosure - Share-Based Compensation - Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 99941901 - Disclosure - Loss per Share - Anti-dilutive common equivalent shares (Details) link:presentationLink link:calculationLink link:definitionLink 99942101 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 99942201 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99942301 - Disclosure - Segmented Information (Details) link:presentationLink link:calculationLink link:definitionLink 99942403 - Disclosure - Income Taxes - Statutory tax impact on state and local tax expense (Details) link:presentationLink link:calculationLink link:definitionLink 99942407 - Disclosure - Income Taxes - Non-capital loss (Details) link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - Nature of Operations link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - Significant Accounting Estimates and Judgements link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - Recent Accounting Pronouncements Issued and Adopted link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - Receivables and Prepayments link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - Equipment and Software link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - Royalty Liability link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - Exploration Assets link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - General and Administrative Expenses link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - Accounts Payable and Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - Financing Activity link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - Shares issued as per At-the-Market Equity Distribution Agreement ("ATM") link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - Warrants link:presentationLink link:calculationLink link:definitionLink 995211901 - Disclosure - Loss per Share link:presentationLink link:calculationLink link:definitionLink 995212001 - Disclosure - Financial Instruments link:presentationLink link:calculationLink link:definitionLink 995212101 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 995212201 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 995212301 - Disclosure - Segmented Information link:presentationLink link:calculationLink link:definitionLink 995212401 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995212501 - Disclosure - Subsequent Event link:presentationLink link:calculationLink link:definitionLink 99930203 - Disclosure - Basis of Presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 99930303 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - Receivables and Prepayments (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - Equipment and Software (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - Strategic Alliance with Allseas Group S. A. and Affiliates (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 99931003 - Disclosure - Royalty Liability (Tables) link:presentationLink link:calculationLink link:definitionLink 99931103 - Disclosure - Exploration Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 99931203 - Disclosure - General and Administrative Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 99931303 - Disclosure - Accounts Payable and Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 99931903 - Disclosure - Loss per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 99932003 - Disclosure - Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 99932403 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - Significant Accounting Estimates and Judgements (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - Equipment and Software (Details) link:presentationLink link:calculationLink link:definitionLink 99941002 - Disclosure - Royalty Liability - Fair value of the royalty liability (Details) link:presentationLink link:calculationLink link:definitionLink 99942401 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 99942404 - Disclosure - Income Taxes - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99942406 - Disclosure - Income Taxes - Unused tax losses and unused tax credits (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink