Critical Accounting Judgments and Estimates	12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]
Critical Accounting Judgments and Estimates	(a) Significant judgments Preparation of the consolidated financial statements requires management to make judgments in applying the Company's accounting policies. Judgments that have the most significant effect on the amounts recognized in these consolidated financial statements relate to functional currency, income taxes, provisions, highly inflationary economy, title to mineral property interests and reclamation and closure cost obligations. These judgments have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year. Functional currency Management determines the functional currency for each entity. This requires that management assess the primary economic environment in which each of these entities operates. Management’s determination of functional currencies affects how the Company translates foreign currency balances and transactions. Determination includes an assessment of various indicators. In determining the functional currency of the Company’s operations in Canada (Canadian dollar), UK (British Pound) and Argentina (U.S. dollar and Argentine Peso), management considered the indicators of ASC 830 Foreign Currency Matters. Income taxes and taxes receivable Significant judgment is required in determining the provision for income taxes. There are many transactions and calculations undertaken during the ordinary course of business for which the ultimate tax determination is uncertain and subject to judgment. The Company recognizes liabilities and contingencies for anticipated tax audit issues based on the Company’s current understanding of the tax law in the various jurisdictions in which it operates. For matters where it is probable that an adjustment will be made, the Company records its best estimate of the tax liability including the related interest and penalties in the current tax provision. Management believes they have adequately provided for the probable outcome of these matters; however, the final outcome may result in a materially different outcome than the amount included in the tax liabilities. The Company has receivables due from the Argentinean government for value-added taxes. Significant estimates and judgments are involved in the assessment of recoverability of these receivables. Changes in management’s impairment assumptions may result in an additional impairment provision, or a reduction to any previously recorded impairment provision, with the impact recorded in profit or loss. The Company has accrued deferred income tax assets but may not be able to utilize part or all of these assets in the future. The Company only recognizes the expected future tax benefit from these assets if it is considered more likely than not that the tax benefit will be realized. Otherwise, a valuation allowance is applied against deferred tax assets that are not more likely than not to be utilized. Assessing the recoverability of deferred tax assets requires management to make significant estimates related to expectations of future taxable income, including application of existing tax laws in each jurisdiction, assumptions about future metals prices, the macroeconomic environment and results of the Company’s operations. To the extent that future cash flows and taxable income differ significantly from estimates, the Company’s ability to realize deferred tax assets could be impacted. Additionally, future changes in tax laws could limit the ability to obtain the future benefits represented by the deferred tax assets Title to mineral property interests Although the Company has taken steps to verify title to mineral properties in which it has an interest, these procedures do not guarantee the Company’s title. Such properties may be subject to prior agreements or transfers and title may be affected by undetected defects. Highly inflationary economy The Company has designated Argentina as a highly inflationary economy in accordance with ASC 830, Foreign Currency Matters, and has therefore employed the use of the highly inflationary accounting. The determination of whether an economy is highly inflationary requires the Company to monitor, assess and calculate whether the three-year cumulative inflation rate exceeds 100%. The determination of whether an economy is highly inflationary requires the Company to make certain estimates and judgements, such as assessment of historic inflation rates and anticipation of future trends. (b) Use of estimates The preparation of theses consolidated financial statements in conformity with US GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of these consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company also makes estimates and assumptions concerning the future. The determination of estimates requires the exercise of judgment based on various assumptions and other factors such as historical experience and current and expected economic conditions. Actual results could differ from those estimates. The more significant areas requiring the use of management estimates and assumptions relate to mineral reserves, asset retirement obligations, inventories and the allocation of fair value to assets and liabilities assumed in connection with business combinations. These estimates have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year. The Company is also exposed to legal risk. The outcome of currently pending and future proceedings cannot be predicted with certainty. Thus, an adverse decision in a lawsuit could result in additional costs that are not covered, either wholly or partly, under insurance policies and that could significantly influence the business and results of operations. Estimates and assumptions are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances. Mineral reserves The Company uses estimates and assumptions related to mineral reserves that are the basis for future cash flow estimates utilized in impairment calculations and units-of production amortization calculations, environmental, reclamation and closure obligations and estimates of recoverable silver and gold in inventories. The Company relies on their technical personnel and independent mining consultants to determine the estimates of mineral reserves. Mineral reserve estimates are based upon engineering evaluations of samplings of drill holes and other openings. Business Combinations The acquisition method of accounting for business combinations in accordance with ASC 805 requires management to determine the fair value of assets acquired and liabilities assumed on the date of the acquisition. In determining and allocating the fair values of assets and liabilities in a business combination, the Company relies on appraisals, internal valuations based on discounted cash flow, historical experience and other reliable information available as of the date of the acquisition. Change in estimates During the year 2018, the Company conducted a review of its plant and buildings which resulted in changes in its expected use. It was determined that the renovation work performed in 2016 and 2017 on these assets was having greater success than originally anticipated in extending their useful life. Additionally, metallurgical studies performed throughout 2018 confirmed that the plant could be successfully used to process mineralized materials from other mineral properties of the Company. It is now expected that the useful life of these assets will be extended from an original estimate of 36 months in 2017 to 87 months from December 31, 2018. The changes to the useful life of these assets were adopted prospectively for the year ended December 31, 2018.

Critical Accounting Judgments and Estimates

12 Months Ended

Dec. 31, 2019

Critical Accounting Judgments and Estimates

(a) Significant judgments

Preparation of the consolidated financial statements requires management to make judgments in applying the Company's accounting policies. Judgments that have the most significant effect on the amounts recognized in these consolidated financial statements relate to functional currency, income taxes, provisions, highly inflationary economy, title to mineral property interests and reclamation and closure cost obligations. These judgments have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year.

Functional currency

Management determines the functional currency for each entity. This requires that management assess the primary economic environment in which each of these entities operates. Management’s determination of functional currencies affects how the Company translates foreign currency balances and transactions. Determination includes an assessment of various indicators. In determining the functional currency of the Company’s operations in Canada (Canadian dollar), UK (British Pound) and Argentina (U.S. dollar and Argentine Peso), management considered the indicators of ASC 830 Foreign Currency Matters.

Income taxes and taxes receivable

Significant judgment is required in determining the provision for income taxes. There are many transactions and calculations undertaken during the ordinary course of business for which the ultimate tax determination is uncertain and subject to judgment. The Company recognizes liabilities and contingencies for anticipated tax audit issues based on the Company’s current understanding of the tax law in the various jurisdictions in which it operates. For matters where it is probable that an adjustment will be made, the Company records its best estimate of the tax liability including the related interest and penalties in the current tax provision. Management believes they have adequately provided for the probable outcome of these matters; however, the final outcome may result in a materially different outcome than the amount included in the tax liabilities.

The Company has receivables due from the Argentinean government for value-added taxes. Significant estimates and judgments are involved in the assessment of recoverability of these receivables. Changes in management’s impairment assumptions may result in an additional impairment provision, or a reduction to any previously recorded impairment provision, with the impact recorded in profit or loss.

The Company has accrued deferred income tax assets but may not be able to utilize part or all of these assets in the future. The Company only recognizes the expected future tax benefit from these assets if it is considered more likely than not that the tax benefit will be realized. Otherwise, a valuation allowance is applied against deferred tax assets that are not more likely than not to be utilized. Assessing the recoverability of deferred tax assets requires management to make significant estimates related to expectations of future taxable income, including application of existing tax laws in each jurisdiction, assumptions about future metals prices, the macroeconomic environment and results of the Company’s operations. To the extent that future cash flows and taxable income differ significantly from estimates, the Company’s ability to realize deferred tax assets could be impacted. Additionally, future changes in tax laws could limit the ability to obtain the future benefits represented by the deferred tax assets

Title to mineral property interests

Although the Company has taken steps to verify title to mineral properties in which it has an interest, these procedures do not guarantee the Company’s title. Such properties may be subject to prior agreements or transfers and title may be affected by undetected defects.

Highly inflationary economy

The Company has designated Argentina as a highly inflationary economy in accordance with ASC 830, Foreign Currency Matters, and has therefore employed the use of the highly inflationary accounting. The determination of whether an economy is highly inflationary requires the Company to monitor, assess and calculate whether the three-year cumulative inflation rate exceeds 100%. The determination of whether an economy is highly inflationary requires the Company to make certain estimates and judgements, such as assessment of historic inflation rates and anticipation of future trends.

(b) Use of estimates

The preparation of theses consolidated financial statements in conformity with US GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of these consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company also makes estimates and assumptions concerning the future. The determination of estimates requires the exercise of judgment based on various assumptions and other factors such as historical experience and current and expected economic conditions. Actual results could differ from those estimates.

The more significant areas requiring the use of management estimates and assumptions relate to mineral reserves, asset retirement obligations, inventories and the allocation of fair value to assets and liabilities assumed in connection with business combinations. These estimates have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year.

The Company is also exposed to legal risk. The outcome of currently pending and future proceedings cannot be predicted with certainty. Thus, an adverse decision in a lawsuit could result in additional costs that are not covered, either wholly or partly, under insurance policies and that could significantly influence the business and results of operations.

Estimates and assumptions are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances.

Mineral reserves

The Company uses estimates and assumptions related to mineral reserves that are the basis for future cash flow estimates utilized in impairment calculations and units-of production amortization calculations, environmental, reclamation and closure obligations and estimates of recoverable silver and gold in inventories. The Company relies on their technical personnel and independent mining consultants to determine the estimates of mineral reserves. Mineral reserve estimates are based upon engineering evaluations of samplings of drill holes and other openings.

Business Combinations

The acquisition method of accounting for business combinations in accordance with ASC 805 requires management to determine the fair value of assets acquired and liabilities assumed on the date of the acquisition. In determining and allocating the fair values of assets and liabilities in a business combination, the Company relies on appraisals, internal valuations based on discounted cash flow, historical experience and other reliable information available as of the date of the acquisition.

Change in estimates

During the year 2018, the Company conducted a review of its plant and buildings which resulted in changes in its expected use. It was determined that the renovation work performed in 2016 and 2017 on these assets was having greater success than originally anticipated in extending their useful life. Additionally, metallurgical studies performed throughout 2018 confirmed that the plant could be successfully used to process mineralized materials from other mineral properties of the Company. It is now expected that the useful life of these assets will be extended from an original estimate of 36 months in 2017 to 87 months from December 31, 2018. The changes to the useful life of these assets were adopted prospectively for the year ended December 31, 2018.