1. Summary of Significant Accounting Policies and Business Operations | 1. Summary of Significant Accounting Policies and Business Operations Business Operations Thunder Mountain Gold, Inc. (Thunder Mountain, THMG, or the Company) was originally incorporated under the laws of the State of Idaho on November 9, 1935, under the name of Montgomery Mines, Inc. In April 1978, the Montgomery Mines Corporation was obtained by a group of the Thunder Mountain property holders and changed its name to Thunder Mountain Gold, Inc., with the primary goal to further develop their holdings in the Thunder Mountain Mining District, located in Valley County, Idaho. Thunder Mountain Gold, Inc. takes its name from the Thunder Mountain Mining District, where its principal lode mining claims were located. For several years, the Companys activities were restricted to maintaining its property position and exploration activities. The Company sold its holdings in the Thunder Mountain Mining District in 2005 and began the process of acquiring and developing another project. In 2007, the Company acquired the South Mountain Mines property in Owyhee County, located in southwest Idaho, and initiated exploration activities on that property, which continue today. The Company also acquired additional claims on prospective ground in the Reese River Valley, 20 miles south of Battle Mountain, in Lander County Nevada. On February 27, 2019, the Company entered into an Option Agreement, (the BeMetals Option Agreement) with BeMetals Corp. Under the terms of the BeMetals Option Agreement, BMET USA will be entitled to purchase 100% of the issued and outstanding shares of South Mountain Mines, Inc. (SMMI) from Thunder Mountain Resources, Inc. (TMRI), both wholly owned subsidiaries of the Company. The term of the agreement is for two years, with an option to extend to three years, with BeMetals conducting a preliminary economic assessment ("PEA") completed by a mutually agreed third-party engineering firm. Over its term, this agreement requires cash payments to the Company of $1,350,000; $1,100,000 in cash and $250,000 in exchange for shares of the Companys common stock. For the six months ended June 30, 2020, the Company recognized $150,000 in management services income Basis of Presentation and Going Concern These unaudited interim consolidated financial statements have been prepared by the management of the Company in accordance with accounting principles generally accepted in the United States of America for interim financial information. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete consolidated financial statements. In the opinion of the Companys management, all adjustments (consisting of only normal recurring accruals) considered necessary for a fair presentation of the interim consolidated financial statements have been included. The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities known to exist as of the date the financial statements are published, and the reported amounts of revenues and expenses during the reporting period. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of the Company's financial statements; accordingly, it is possible that the actual results could differ from these estimates and assumptions, which could have a material effect on the reported amounts of the Company's financial position and results of operations. Operating results for the six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2020. For further information refer to the financial statements and footnotes thereto in the Companys audited financial statements for the year ended December 31, 2019 as filed with the Securities and Exchange Commission. The accompanying consolidated financial statements have been prepared under the assumption that the Company will continue as a going concern. The Company has historically incurred losses, however, under the BeMetals Option Agreement (Note 3), the Company now has a recurring source of revenue, and its ability to continue as a going concern is no longer dependent on equity capital raises and borrowings. However, if necessary, the Company continues to have the ability to raise additional capital in order to fund its future exploration and working capital requirements. The Companys plans for the long-term continuation as a going concern include operating on the cash flows and consideration payments provided under the BeMetals Option Agreement. Principles of Consolidation The consolidated financial statements include the accounts of the Company; its wholly owned subsidiaries, Thunder Mountain Resources, Inc. (TMRI) and South Mountain Mines, Inc. (SMMI); and a company in which the Company owns 75% and has majority control, Owyhee Gold Trust, LLC (OGT). The Companys consolidated financial statements reflect the other investors 25% non-controlling, capped interest in OGT. Intercompany accounts are eliminated in consolidation. Accounting Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions include the carrying value of properties and mineral interests, environmental remediation liabilities, deferred tax assets, and stock-based compensation. Managements estimates and assumptions are based on historical experience and other assumptions believed to be reasonable under the circumstances. Actual results could differ from those estimates. Revenue Recognition Management service revenue is recognized when the Company has satisfied its performance obligation required under its management contract. Such obligation is satisfied over time as work is performed and the Company has a contractual right to payment. Income Taxes The Company recognizes deferred income tax liabilities or assets at the end of each period using the tax rate expected to be in effect when the taxes are actually paid or recovered. A valuation allowance is recognized on deferred tax assets when it is more likely than not that some or all of the deferred tax assets will not be realized. Cash and Cash Equivalents For the purposes of the balance sheet and statement of cash flows, the Company considers all highly liquid investments with a maturity of three months or less when purchased to be a cash equivalent. Fair Value Measurements When required to measure assets or liabilities at fair value, the Company uses a fair value hierarchy based on the level of independent, objective evidence surrounding the inputs used. The Company determines the level within the fair value hierarchy in which the fair value measurements in their entirety fall. The categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Level 1 uses quoted prices in active markets for identical assets or liabilities, Level 2 uses significant other observable inputs, and Level 3 uses significant unobservable inputs. The amount of the total gains or losses for the period are included in earnings that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date. At June 30, 2020, the Company has one financial asset, an investment in marketable equity security, that is adjusted to fair value on a recurring basis for which the fair value is determined based on Level 1 inputs as the equity security is traded on a stock exchange. The Company has no financial liabilities that are adjusted to fair value on a recurring basis. Financial Instruments The Companys financial instruments include cash and cash equivalents, investment in equity security and related party notes payable the carrying value of which approximates fair value based on the nature of those instruments. Investments The Company determines the appropriate classification of investments at the time of acquisition and re-evaluates such determinations at each reporting date. Equity securities determined to be marketable are carried at fair value determined using Level 1 fair value measurement inputs with the change in fair value recognized as unrealized gain (loss) in the consolidated statement of operations each reporting period. Gains and losses on the sale of securities are recognized on a specific identification basis. Mineral Interests The Company capitalizes costs for acquiring mineral interests, and expenses costs to maintain mineral rights and leases as incurred. Exploration costs are expensed in the period in which they occur. Should a property reach the production stage, these capitalized costs would be amortized using the units-of-production method based on periodic estimates of ore reserves. Mineral interests are periodically assessed for impairment of value and any subsequent losses are charged to operations at the time of impairment. If a mineral interest is abandoned or sold, its capitalized costs are charged to operations. Consideration received by the Company pursuant to joint ventures or purchase option agreements is applied against the carrying value of the related mineral interest. When and if payments received exceed the carrying value, the excess amount is recognized as a gain in the consolidated statement of operations in the period the consideration is received. Investments in Joint Venture The Companys accounting policy for joint ventures is as follows: 1. 2. 3. Reclamation and Remediation The Companys operations have been, and are subject to, standards for mine reclamation that have been established by various governmental agencies. The Company would record the fair value of an asset retirement obligation as a liability in the period in which the Company incurred a legal obligation for the retirement of tangible long-lived assets. A corresponding asset would also be recorded and depreciated over the life of the asset. After the initial measurement of the asset retirement obligation, the liability is adjusted at the end of each reporting period to reflect changes in the estimated future cash flows underlying the obligation. Determination of any amounts recognized upon adoption is based upon numerous estimates and assumptions, including future retirement costs, future inflation rates and the credit-adjusted risk-free interest rates. For non-operating properties, the Company accrues costs associated with environmental remediation obligations when it is probable that such costs will be incurred, and they are reasonably estimable. Such costs are based on managements estimate of amounts expected to be incurred when the remediation work is performed. Share-Based Compensation Share-based payments to employees and directors, including grants of employee stock options, are measured at fair value and expensed in the consolidated statement of operations over the vesting period. Recent Accounting Pronouncements Accounting Standards Updates Adopted In August 2018, the FASB issued ASU No. 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The update removes, modifies and makes additions to the disclosure requirements on fair value measurements. The update is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company evaluated the new standard in the first quarter of 2020 and determined that ASU 2018-13 did not have an impact on the Companys consolidated financial statement disclosures. Accounting Standards Updates to Become Effective in Future Periods In December 2019, the FASB issued ASU No. 2019-12 Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The update contains a number of provisions intended to simplify the accounting for income taxes. The update is effective for fiscal years beginning after December 15, 2020, with early adoption permitted. Management is evaluating the impact of this update on the Companys consolidated financial statements. Net Income (Loss) Per Share The Company is required to have dual presentation of basic earnings per share (EPS) and diluted EPS. Basic EPS is computed as net income (loss) divided by the weighted average number of common shares outstanding for the period. Diluted EPS is calculated based on the weighted average number of common shares outstanding during the period plus the effect of potentially dilutive common stock equivalents, including options and warrants to purchase the Companys common stock. The potential dilutive common stock equivalents for each period are as follows: For the six months ended June 30, 2020, stock options of 5,705,000 are excluded from the calculation of diluted income per share as the options exercise prices was not lower than the average share price during the period. For the six months ended June 30, 2019, stock options of 5,035,000 are excluded in the calculation of diluted income per share as the options exercise prices was not lower than the average share price during the period |