140402 - Disclosure - TOML Acquisition - Schedule of net assets acquired as part of the TOML acquisition (Details2) link:presentationLink link:calculationLink link:definitionLink 140604 - Disclosure - Business Combination - Summary of reconciliation of cash proceeds from the Business Combination (Details) link:presentationLink link:calculationLink link:definitionLink 140801 - Disclosure - Financial Instruments - Schedule of categories of financial instruments (Details) link:presentationLink link:calculationLink link:definitionLink 142204 - Disclosure - Income Taxes - The Company's deferred income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 200100 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 200200 - Statement - Condensed Consolidated Statements of Loss and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 200400 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 100090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 100105 - Statement - Condensed Consolidated Balance Sheets (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 100300 - Statement - Condensed Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 131603 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 140101 - Disclosure - Nature of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 140202 - Disclosure - Basis of Presentation - Non controlling interest (Details) link:presentationLink link:calculationLink link:definitionLink 140301 - Disclosure - Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 140302 - Disclosure - Significant Accounting Policies - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 140601 - Disclosure - Business Combination (Details) link:presentationLink link:calculationLink link:definitionLink 140602 - Disclosure - Business Combination - Summary of the Special Shares and their respective vesting thresholds (Details) link:presentationLink link:calculationLink link:definitionLink 140603 - Disclosure - Business Combination - SOAC sponsors (Details) link:presentationLink link:calculationLink link:definitionLink 140605 - Disclosure - Business Combination - Transaction costs and SOAC Shares (Details) link:presentationLink link:calculationLink link:definitionLink 140606 - Disclosure - Business Combination - The number of shares of TMC common shares issued immediately following the consummation of the Business Combination (Details) link:presentationLink link:calculationLink link:definitionLink 140607 - Disclosure - Business Combination - Transaction costs related to the Business Combination (Details) link:presentationLink link:calculationLink link:definitionLink 140701 - Disclosure - TOML Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 140702 - Disclosure - TOML Acquisition - Schedule of net assets acquired as part of the TOML acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 141001 - Disclosure - Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 141101 - Disclosure - Exploration Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 141102 - Disclosure - Exploration Contracts - Reconciliation of the Company's explorations contracts (Details) link:presentationLink link:calculationLink link:definitionLink 141103 - Disclosure - Exploration Contracts - Schedule of breakdown of exploration expenses (Details) link:presentationLink link:calculationLink link:definitionLink 141201 - Disclosure - General and Administrative Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 141401 - Disclosure - Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 141402 - Disclosure - Warrants - Fair value of warrant liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 141403 - Disclosure - Warrants - Level 3 fair value measurements (Details) link:presentationLink link:calculationLink link:definitionLink 141501 - Disclosure - Common Shares (Details) link:presentationLink link:calculationLink link:definitionLink 141502 - Disclosure - Common Shares - Schedule of authorized, issued and outstanding common shares and special shares (Details) link:presentationLink link:calculationLink link:definitionLink 141503 - Disclosure - Common Shares - Schedule of common shares (Details) link:presentationLink link:calculationLink link:definitionLink 141601 - Disclosure - Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 141603 - Disclosure - Share-Based Compensation - Schedule of company's stock options outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 141604 - Disclosure - Share-Based Compensation - Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 141606 - Disclosure - Share-Based Compensation - Schedule of weighted average assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 141701 - Disclosure - Loss per Share - Anti-dilutive common equivalent shares (Details) link:presentationLink link:calculationLink link:definitionLink 141801 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 141901 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 142101 - Disclosure - Segmented Information - Schedule of equipment (Details) link:presentationLink link:calculationLink link:definitionLink 142206 - Disclosure - Income Taxes - Non-capital loss (Details) link:presentationLink link:calculationLink link:definitionLink 200105 - Statement - Condensed Consolidated Balance Sheets (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 200300 - Statement - Condensed Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 230603 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 240101 - Disclosure - Nature of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 240401 - Disclosure - Exploration Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 240402 - Disclosure - Exploration Contracts - Schedule of breakdown of exploration expenses (Details) link:presentationLink link:calculationLink link:definitionLink 240501 - Disclosure - Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 240502 - Disclosure - Warrants - Fair value of warrant liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 240503 - Disclosure - Warrants - Level 3 fair value measurements (Details) link:presentationLink link:calculationLink link:definitionLink 240601 - Disclosure - Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 240701 - Disclosure - Loss per Share - Anti-dilutive common equivalent shares (Details) link:presentationLink link:calculationLink link:definitionLink 240801 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 240901 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 241001 - Disclosure - Segmented Information - Schedule of equipment (Details) link:presentationLink link:calculationLink link:definitionLink 100100 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 100200 - Statement - Condensed Consolidated Statements of Loss and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 100400 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 110101 - Disclosure - Nature of Operations link:presentationLink link:calculationLink link:definitionLink 110201 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 110301 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 110401 - Disclosure - Significant Accounting Estimates and Judgements link:presentationLink link:calculationLink link:definitionLink 110501 - Disclosure - Recent Accounting Pronouncements Issued and Adopted link:presentationLink link:calculationLink link:definitionLink 110601 - Disclosure - Business Combination link:presentationLink link:calculationLink link:definitionLink 110701 - Disclosure - TOML Acquisition link:presentationLink link:calculationLink link:definitionLink 110801 - Disclosure - Financial Instruments link:presentationLink link:calculationLink link:definitionLink 110901 - Disclosure - Receivables and Prepayments link:presentationLink link:calculationLink link:definitionLink 111001 - Disclosure - Equipment link:presentationLink link:calculationLink link:definitionLink 111101 - Disclosure - Exploration Contracts link:presentationLink link:calculationLink link:definitionLink 111201 - Disclosure - General and Administrative Expenses link:presentationLink link:calculationLink link:definitionLink 111301 - Disclosure - Convertible Debentures link:presentationLink link:calculationLink link:definitionLink 111401 - Disclosure - Warrants link:presentationLink link:calculationLink link:definitionLink 111501 - Disclosure - Common Shares link:presentationLink link:calculationLink link:definitionLink 111601 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 111701 - Disclosure - Loss per Share link:presentationLink link:calculationLink link:definitionLink 111801 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 111901 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 112001 - Disclosure - Supplemental Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 112101 - Disclosure - Segmented Information link:presentationLink link:calculationLink link:definitionLink 112201 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 112301 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 120302 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 130203 - Disclosure - Basis of Presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 130303 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 130603 - Disclosure - Business Combination (Tables) link:presentationLink link:calculationLink link:definitionLink 130703 - Disclosure - TOML Acquisition (Tables) link:presentationLink link:calculationLink link:definitionLink 130803 - Disclosure - Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 130903 - Disclosure - Receivables and Prepayments (Tables) link:presentationLink link:calculationLink link:definitionLink 131003 - Disclosure - Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 131103 - Disclosure - Exploration Contracts (Tables) link:presentationLink link:calculationLink link:definitionLink 131203 - Disclosure - General and Administrative Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 131403 - Disclosure - Warrants (Tables) link:presentationLink link:calculationLink link:definitionLink 131503 - Disclosure - Common Shares (Tables) link:presentationLink link:calculationLink link:definitionLink 131703 - Disclosure - Loss per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 132003 - Disclosure - Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 132103 - Disclosure - Segmented Information (Tables) link:presentationLink link:calculationLink link:definitionLink 132203 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 140201 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 140403 - Disclosure - Significant Accounting Estimates and Judgements (Details) link:presentationLink link:calculationLink link:definitionLink 140901 - Disclosure - Receivables and Prepayments (Details) link:presentationLink link:calculationLink link:definitionLink 141301 - Disclosure - Convertible Debentures (Details) link:presentationLink link:calculationLink link:definitionLink 141602 - Disclosure - Share-Based Compensation - Schedule of company's stock options (Details) link:presentationLink link:calculationLink link:definitionLink 141605 - Disclosure - Share-Based Compensation - Schedule of weighted average assumptions under the company's STIP (Details) link:presentationLink link:calculationLink link:definitionLink 142001 - Disclosure - Supplemental Cash Flow Information - Schedule non cash investing and financing activities (Details) link:presentationLink link:calculationLink link:definitionLink 142201 - Disclosure - Income Taxes - Reconciliation of Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 142202 - Disclosure - Income Taxes - The tax expense at statutory rates for the Company (Details) link:presentationLink link:calculationLink link:definitionLink 142203 - Disclosure - Income Taxes - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 142205 - Disclosure - Income Taxes - Unused tax losses and unused tax credits (Details) link:presentationLink link:calculationLink link:definitionLink 210101 - Disclosure - Nature of Operations link:presentationLink link:calculationLink link:definitionLink 210201 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 210301 - Disclosure - Recent Accounting Pronouncements Issued and Adopted link:presentationLink link:calculationLink link:definitionLink 210401 - Disclosure - Exploration Contracts link:presentationLink link:calculationLink link:definitionLink 210501 - Disclosure - Warrants link:presentationLink link:calculationLink link:definitionLink 210601 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 210701 - Disclosure - Loss per Share link:presentationLink link:calculationLink link:definitionLink 210801 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 210901 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 211001 - Disclosure - Segmented Information link:presentationLink link:calculationLink link:definitionLink 220202 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 230303 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 230403 - Disclosure - Exploration Contracts (Tables) link:presentationLink link:calculationLink link:definitionLink 230503 - Disclosure - Warrants (Tables) link:presentationLink link:calculationLink link:definitionLink 230703 - Disclosure - Loss per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 231003 - Disclosure - Segmented Information (Tables) link:presentationLink link:calculationLink link:definitionLink 240201 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink