Organization, Operations and Significant Accounting Policies	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
Organization, Operations and Significant Accounting Policies	1. ORGANIZATION, OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES Organization and Operations U.S. Energy Corp. (collectively with its subsidiaries referred to as the “Company” or “U.S. Energy”) was incorporated in the State of Wyoming on January 26, 1966. The Company’s principal business activities are focused on the acquisition, exploration and development of oil and gas properties in the United States. Basis of Presentation The accompanying unaudited condensed consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Accordingly, certain information and footnote disclosures required by U.S. GAAP for complete financial statements have been condensed or omitted in accordance with such rules and regulations. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the consolidated financial statements have been included. For further information, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K and 10K/A for the year ended December 31, 2017. Our financial condition as of September 30, 2018, and operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the financial condition and results of operations that may be expected for any future interim period or for the year ending December 31, 2018. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include oil and gas reserves that are used in the calculation of depreciation, depletion, amortization and impairment of the carrying value of both evaluated oil and gas properties as well as unevaluated properties; production and commodity price estimates used to record accrued oil and gas sales receivable; valuation of commodity derivative instruments; and the cost of future asset retirement obligations. The Company evaluates its estimates on an on-going basis and bases its estimates on historical experience and on various other assumptions the Company believes to be reasonable. Due to inherent uncertainties, including the future prices of oil and gas, these estimates could change in the near term and such changes could be material. Principles of Consolidation The accompanying financial statements include the accounts of the Company and its wholly-owned subsidiary Energy One LLC (“Energy One”). All inter-company balances and transactions have been eliminated in consolidation. Correction of Immaterial Errors The accompanying December 31, 2017, restated condensed consolidated balance sheet includes a correction related to the classification and presentation of the Series A Convertible Preferred Stock (the “Preferred Stock”). The Preferred Stock had been reported in stockholders’ equity from the date of issuance in February 2016. During the three months ended September 30, 2018, the Company determined that the Preferred Stock should not be included in stockholders’ equity, due to a redemption feature outside the control of the Company, whereby the holders may require redemption in the event of a change in control. The Company has corrected the presentation on the balance sheet to exclude the Preferred Stock from stockholders’ equity. The correction of the error reclassified $2.0 million from stockholders’ equity into temporary equity but had no effect on previously reported net income or earnings per share in any prior period. Recently Adopted Accounting Pronouncements Revenue recognition. In May 2014, the Financial Accounting Standards Board (“FASB”) issued a comprehensive new revenue recognition standard that supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and industry-specific guidance in Subtopic 932-605, Extractive Activities-Oil and Gas-Revenue Recognition. The core principle of the new guidance is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring those goods or services. The new standard also requires significantly expanded disclosure regarding the qualitative and quantitative information of an entity’s nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The standard creates a five-step model that requires companies to exercise judgment when considering the terms of a contract and all relevant facts and circumstances. The standard allows for several transition methods: (a) a full retrospective adoption in which the standard is applied to all of the periods presented, or (b) a modified retrospective adoption in which the standard is applied only to the most current period presented in the financial statements, including additional disclosures of the standard’s application impact to individual financial statement line items. In March, April, May and December 2016, the FASB issued new guidance in Topic 606, Revenue from Contracts with Customers, to address the following potential implementation issues of the new revenue standard: (a) to clarify the implementation guidance on principal versus agent considerations, (b) to clarify the identification of performance obligations and the licensing implementation guidance and (c) to address certain issues in the guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. This standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company follows the sales method of accounting for oil and natural gas production, which is generally consistent with the revenue recognition provision of the new standard. The Company has completed the process of evaluating the effect of the adoption and determined there were no changes required to our reported revenues as a result of the adoption. The majority of our revenue arrangements generally consist of a single performance obligation to transfer promised goods or services. Based on our evaluation process and review of our contracts with customers, the timing and amount of revenue recognized based on the standard is consistent with our revenue recognition policy under previous guidance. The Company adopted the new standard effective January 1, 2018, using the modified retrospective approach, and has expanded its financial statement disclosures in order to comply with the standard. The Company implemented processes and controls to ensure new contracts are reviewed for the appropriate accounting treatment and to generate the disclosures required under the new standard in the first quarter of 2018. We have determined the adoption of the standard did not have a material impact on our results of operations, cash flows, or financial position. Financial Instruments. In January 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-01 Financial Instruments, Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”). The amendments in the ASU 2016-01 require equity investments, other than those accounted for under the equity method or result in consolidation of an investee, to be measured at fair value with changes in fair value recognized in income. The amendment is effective for public business entities with fiscal years beginning after December 31, 2017. The Company adopted this standard on January 1, 2018, with a cumulative effect adjustment to retained earnings at December 31, 2017 of $903 thousand. The adjustment to retained earnings related to fair value changes of marketable securities that had been accumulated previously in other comprehensive loss. Prospectively, unrealized gains and losses on marketable securities are recorded in earnings under the caption in other income, changes in fair value of marketable securities. Prior period gains and losses are recorded in other comprehensive loss; therefore, current year periods are not comparable to periods in the prior year. Recently Issued Accounting Pronouncements Leases. In February 2016, the FASB issued ASU- No. 2016-02, Leases (Topic 842). The standard requires lessees to recognize the assets and liabilities that arise from leases on the balance sheet. A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The new guidance is effective for annual and interim reporting periods beginning after December 15, 2018. The amendments should be applied at the beginning of the earliest period presented using a modified retrospective approach with earlier application permitted as of the beginning of an interim or annual reporting period. The update does not apply to leases of mineral rights to explore for or use crude oil or natural gas. The Company is currently evaluating the impact of the new guidance on its consolidated financial statements, however, based on its current operating leases and status as a non-operator, it is not expected to have a material impact on its condensed and consolidated balance sheet or statement of operations. Financial instruments with characteristics of liabilities and equity. In July 2017, the FASB has issued a two-part ASU No. 2017-11, I. Accounting for Certain Financials Instruments with Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interest with a Scope Exception. The ASU is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the effect that adopting this guidance will have on its consolidated financial position, cash flows and results of operations. Fair value measurement. In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820 Fair Value Measurement. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those years. The Company is evaluating the impact the new guidance will have on its condensed and consolidated financial statements and related disclosures.

Organization, Operations and Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Organization, Operations and Significant Accounting Policies

1. ORGANIZATION, OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES

Organization and Operations

U.S. Energy Corp. (collectively with its subsidiaries referred to as the “Company” or “U.S. Energy”) was incorporated in the State of Wyoming on January 26, 1966. The Company’s principal business activities are focused on the acquisition, exploration and development of oil and gas properties in the United States.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Accordingly, certain information and footnote disclosures required by U.S. GAAP for complete financial statements have been condensed or omitted in accordance with such rules and regulations. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the consolidated financial statements have been included.

For further information, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K and 10K/A for the year ended December 31, 2017. Our financial condition as of September 30, 2018, and operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the financial condition and results of operations that may be expected for any future interim period or for the year ending December 31, 2018.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include oil and gas reserves that are used in the calculation of depreciation, depletion, amortization and impairment of the carrying value of both evaluated oil and gas properties as well as unevaluated properties; production and commodity price estimates used to record accrued oil and gas sales receivable; valuation of commodity derivative instruments; and the cost of future asset retirement obligations. The Company evaluates its estimates on an on-going basis and bases its estimates on historical experience and on various other assumptions the Company believes to be reasonable. Due to inherent uncertainties, including the future prices of oil and gas, these estimates could change in the near term and such changes could be material.

Principles of Consolidation

The accompanying financial statements include the accounts of the Company and its wholly-owned subsidiary Energy One LLC (“Energy One”). All inter-company balances and transactions have been eliminated in consolidation.

Correction of Immaterial Errors

The accompanying December 31, 2017, restated condensed consolidated balance sheet includes a correction related to the classification and presentation of the Series A Convertible Preferred Stock (the “Preferred Stock”). The Preferred Stock had been reported in stockholders’ equity from the date of issuance in February 2016. During the three months ended September 30, 2018, the Company determined that the Preferred Stock should not be included in stockholders’ equity, due to a redemption feature outside the control of the Company, whereby the holders may require redemption in the event of a change in control. The Company has corrected the presentation on the balance sheet to exclude the Preferred Stock from stockholders’ equity. The correction of the error reclassified $2.0 million from stockholders’ equity into temporary equity but had no effect on previously reported net income or earnings per share in any prior period.

Recently Adopted Accounting Pronouncements

Revenue recognition. In May 2014, the Financial Accounting Standards Board (“FASB”) issued a comprehensive new revenue recognition standard that supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and industry-specific guidance in Subtopic 932-605, Extractive Activities-Oil and Gas-Revenue Recognition. The core principle of the new guidance is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring those goods or services. The new standard also requires significantly expanded disclosure regarding the qualitative and quantitative information of an entity’s nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The standard creates a five-step model that requires companies to exercise judgment when considering the terms of a contract and all relevant facts and circumstances. The standard allows for several transition methods: (a) a full retrospective adoption in which the standard is applied to all of the periods presented, or (b) a modified retrospective adoption in which the standard is applied only to the most current period presented in the financial statements, including additional disclosures of the standard’s application impact to individual financial statement line items. In March, April, May and December 2016, the FASB issued new guidance in Topic 606, Revenue from Contracts with Customers, to address the following potential implementation issues of the new revenue standard: (a) to clarify the implementation guidance on principal versus agent considerations, (b) to clarify the identification of performance obligations and the licensing implementation guidance and (c) to address certain issues in the guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. This standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company follows the sales method of accounting for oil and natural gas production, which is generally consistent with the revenue recognition provision of the new standard. The Company has completed the process of evaluating the effect of the adoption and determined there were no changes required to our reported revenues as a result of the adoption. The majority of our revenue arrangements generally consist of a single performance obligation to transfer promised goods or services. Based on our evaluation process and review of our contracts with customers, the timing and amount of revenue recognized based on the standard is consistent with our revenue recognition policy under previous guidance. The Company adopted the new standard effective January 1, 2018, using the modified retrospective approach, and has expanded its financial statement disclosures in order to comply with the standard. The Company implemented processes and controls to ensure new contracts are reviewed for the appropriate accounting treatment and to generate the disclosures required under the new standard in the first quarter of 2018. We have determined the adoption of the standard did not have a material impact on our results of operations, cash flows, or financial position.

Financial Instruments. In January 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-01 Financial Instruments, Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”). The amendments in the ASU 2016-01 require equity investments, other than those accounted for under the equity method or result in consolidation of an investee, to be measured at fair value with changes in fair value recognized in income. The amendment is effective for public business entities with fiscal years beginning after December 31, 2017. The Company adopted this standard on January 1, 2018, with a cumulative effect adjustment to retained earnings at December 31, 2017 of $903 thousand. The adjustment to retained earnings related to fair value changes of marketable securities that had been accumulated previously in other comprehensive loss. Prospectively, unrealized gains and losses on marketable securities are recorded in earnings under the caption in other income, changes in fair value of marketable securities. Prior period gains and losses are recorded in other comprehensive loss; therefore, current year periods are not comparable to periods in the prior year.

Recently Issued Accounting Pronouncements

Leases. In February 2016, the FASB issued ASU- No. 2016-02, Leases (Topic 842). The standard requires lessees to recognize the assets and liabilities that arise from leases on the balance sheet. A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The new guidance is effective for annual and interim reporting periods beginning after December 15, 2018. The amendments should be applied at the beginning of the earliest period presented using a modified retrospective approach with earlier application permitted as of the beginning of an interim or annual reporting period. The update does not apply to leases of mineral rights to explore for or use crude oil or natural gas. The Company is currently evaluating the impact of the new guidance on its consolidated financial statements, however, based on its current operating leases and status as a non-operator, it is not expected to have a material impact on its condensed and consolidated balance sheet or statement of operations.

Financial instruments with characteristics of liabilities and equity. In July 2017, the FASB has issued a two-part ASU No. 2017-11, I. Accounting for Certain Financials Instruments with Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interest with a Scope Exception. The ASU is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the effect that adopting this guidance will have on its consolidated financial position, cash flows and results of operations.

Fair value measurement. In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820 Fair Value Measurement. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those years. The Company is evaluating the impact the new guidance will have on its condensed and consolidated financial statements and related disclosures.