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Critical accounting estimates and judgements | 12 Months Ended
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Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract] |
Critical accounting estimates and judgements | 4. Critical accounting estimates and judgments The preparation of consolidated financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions that affect the application of accounting policies and the reported amounts of assets, liabilities, income and expenses. Actual results may differ from these estimates. Estimates and underlying assumptions are reviewed at each period end. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. 4. Critical accounting estimates and judgments (continued) Significant areas requiring the use of management assumptions, estimates and judgments include determining leach pad inventory, impairment of non-current assets, estimated recoverable reserves and resources, current and deferred taxes, business combinations, commencement of commercial production and functional currency. Actual results could differ from these estimates. Outlined below are some of the areas which require management to make significant judgments, estimates and assumptions. Leach pad inventory The Company considers ore stacked on its leach pads and in process at its mines as work-in-process inventory and records their value in earnings, and includes them in the cost of sales based on ounces of gold sold, using the following assumptions in its estimates:
• | the amount of gold and other metals estimated to be in the ore stacked on the leach pads;
• | the amount of gold and other metals expected to be recovered from the stacks;
• | the amount of gold and other metals in the mill circuits;
• | the amount of gold and other metals in concentrates; and
• | the gold and other metal prices expect to be realized when sold.
If these estimates or assumptions are inaccurate, the Company could be required to write down the value it has recorded on its work-in-process inventories, which would reduce earnings and working capital. At December 31, 2018, the cost of inventory was below its net realizable value. Impairment of non-current assets Non-current assets are tested for impairment when events or changes in circumstances suggest that the carrying amount may not be fully recoverable. We conduct an annual test for impairment of goodwill in the fourth quarter of each fiscal year and at any other time of the year if an indicator of impairment is identified. Calculating the estimated FVLCD of CGUs for non-current asset impairment tests and CGUs or groups of CGUs for goodwill impairment tests requires management to make estimates and assumptions with respect to future production levels, operating and capital costs in the Company's life-of-mine (“LOM”) plans, long-term metal prices, foreign exchange rates and discount rates. Changes in any of the assumptions or estimates used in determining the fair values could impact the impairment analysis. Estimated recoverable reserves and resources Mineral reserve and resource estimates are based on various assumptions relating to operating matters, including, with respect to production costs, mining and processing recoveries, cut-off grades, as well as assumptions relating to long-term commodity prices and, in some cases, exchange rates, inflation rates and capital costs. Cost estimates are based on feasibility study estimates or operating history. Estimates are prepared by appropriately qualified persons, but will be impacted by forecasted commodity prices, inflation rates, exchange rates, capital and production costs and recoveries amongst other factors. Estimated recoverable reserves and resources are used to determine the depreciation of property, plant and equipment at operating mine sites, in accounting for deferred stripping costs, in performing impairment testing and for forecasting the timing of the payment of decommissioning and restoration costs. Therefore, changes in the assumptions used could impact the carrying value of assets, depreciation and impairment charges recorded in the consolidated statement of operations and the carrying value of the decommissioning and restoration provision. 4. Critical accounting estimates and judgments (continued) Current and deferred taxes The Company calculates current and deferred tax provisions for each of the jurisdictions in which it operates. Actual amounts of income tax expense are not final until tax returns are filed and accepted by the relevant authorities. This occurs subsequent to the issuance of the consolidated financial statements. Therefore, earnings in subsequent periods will be affected by the amount that estimates differ from the final tax returns. Estimates of recoverability are required in assessing whether deferred tax assets and deferred tax liabilities are recognized on the consolidated statement of financial position. The Company also evaluates the recoverability of deferred tax assets based on an assessment of the ability to use the underlying future tax deductions before they expire against future taxable income. Deferred tax liabilities arising from temporary differences on investments in subsidiaries, joint ventures and associates are recognized unless the reversal of the temporary differences is not expected to occur in the foreseeable future and can be controlled. Assumptions about the generation of future taxable earnings and repatriation of retained earnings depend on management’s estimates of future production and sales volumes, commodity prices, reserves, operating costs, decommissioning and restoration costs, capital expenditures, dividends and other capital management transactions. Judgment is also required in the application of income tax legislation. These estimates and judgments are subject to risk and uncertainty and could result in an adjustment to current and deferred tax provisions and a corresponding credit or debit to earnings or loss for the period. Business combinations Determination of whether a set of assets acquired and liabilities assumed constitute the acquisition of a business or asset may require the Company to make certain judgements as to whether or not the assets acquired and liabilities assumed include the inputs, processes and outputs necessary to constitute a business as defined in IFRS 3 - Business Combinations. If an acquired set of assets and liabilities includes goodwill, the set is presumed to be a business. Based on an assessment of the relevant facts and circumstances, the Company concluded that the acquisitions of Integra (note 6) met the criteria of a business combination. Business combinations require estimates to be made at the date of acquisition in relation to determining asset and liability fair values and the allocation of the purchase consideration over the fair value of the assets and liabilities. In respect of mining company acquisitions purchase consideration is typically allocated to the mineral reserves and resources being acquired. The estimate of reserves and resources is subject to assumptions relating to life of the mine and may change when new information becomes available. Changes in reserves and resources as a result of factors such as production costs, recovery rates, grade or reserves or commodity prices could impact depreciation rates, asset carrying values and environmental and restoration provisions. Changes in assumptions over long-term commodity prices, market demand and supply, and economic and regulatory climates could also impact the carrying value of assets, including goodwill. Commencement of commercial production Until a mining property is declared as being in the commercial production stage, all costs related to its development are capitalized. The determination of the date on which a mine enters the commercial production stage is a matter of judgment that impacts when capitalization of development costs ceases and recognition of revenues and depreciation of the mining property commences and is charged to profit or loss. Functional currency The functional currency for each of the Company’s subsidiaries is the currency of the primary economic environment in which the entity operates. The Company has determined the functional currency of each entity is the US dollar. Determination of functional currency may involve certain judgements to determine the primary economic environment and the Company reconsiders the functional currency of its entities if there is a change in events and conditions which determined the primary economic environment.

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- Definition Corporate Information And Statement Of IFRS Compliance [Abstract] + References No definition available. + Details
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- Definition The disclosure of judgements that management has made in the process of applying the entity's accounting policies that have the most significant effect on amounts recognised in the financial statements along with information about the assumptions that the entity makes about the future, and other major sources of estimation uncertainty at the end of the reporting period, that have a significant risk of resulting in a material adjustment to the carrying amounts of assets and liabilities within the next year. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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