Organization, Operations and Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Organization and Operations	Organization and Operations U.S. Energy Corp. (collectively with its wholly owned subsidiary, Energy One LLC, referred to as the “Company” in these Notes to Condensed Consolidated Financial Statements) was incorporated in the State of Wyoming on January 26, 1966. The Company’s principal business activities are focused in the acquisition, exploration and development of oil and natural gas properties in the United States.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles (“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 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 for the year ended December 31, 2018. Our financial condition as of March 31, 2019, and operating results for the three months ended March 31, 2019, 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, 2019.
Liquidity and Going Concern	Liquidity and Going Concern As of March 31, 2019, the Company had cash of $1.3 million, a working capital surplus of $1.7 million and an accumulated deficit of $127.1 million. At October 10, 2019, the Company had a cash balance of $1.7 million and accounts payable of approximately $0.4 million. During 2019, the Company has instituted measures to preserve liquidity by reducing the use of third-party contractors, cutting corporate overhead and eliminating other general and administrative costs. However, our liquidity is affected to a large degree by commodity prices, which have fluctuated significantly during recent years. Currently, the Company does not have any commodity derivative contracts in place to protect it in the event of a downturn in commodity prices. In addition, as described in Note 8-Commitments, Contingencies and Related-Party Transactions the costs associated with the ongoing litigation during 2019 have been a significant use of the Company’s existing cash. Continued excessive legal fees associated with litigation could impair the Company’s liquidity profile. These factors raise substantial doubt about the Company’s ability to fund operations for the next twelve months and continue as a going concern. The accompanying condensed consolidated financial statements do not include adjustments relating to the recoverability and classification of recorded asset amounts or amounts of liabilities that might result from the outcome of this uncertainty.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with 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 natural gas reserves that are used in the calculation of depreciation, depletion, amortization and impairment of the carrying value of evaluated oil and natural gas properties; realizability of unevaluated properties; production and commodity price estimates used to record accrued oil and natural gas sales receivables; valuation of warrant 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 natural gas, these estimates could change in the near term and such changes could be material.
Principles of Consolidation	Principles of Consolidation The accompanying financial statements include the accounts of U.S. Energy Corp. and its wholly owned subsidiary Energy One LLC (“Energy One”). All inter-company balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current period presentation of the accompanying financial statements.
Adopted and Recently Issued Accounting Pronouncements	Adopted and Recently Issued Accounting Pronouncements Leases. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), followed by other related ASUs that targeted improvements and additional practical expedient options (collectively “ASU 2016-02”). The standard requires lessees to recognize right-of-use assets and lease payment liabilities on the balance sheet for leases representing the Company’s right to use the underlying assets for the lease term. Each lease that is recognized in the balance sheet will be classified as either finance or operating, with such classification affecting the pattern and classification of expense recognition in the consolidated statements of operations and presentation within the statements of cash flows. The Company evaluated the impacts of ASU 2016-02, which included an analysis of contracts for office leases. As a non-operator of oil and natural gas properties, the Company is not subject to drilling rig agreements, well completion agreements, water handling agreements, or other contracts that include potential lease components. In addition, the scope of ASU 2016-02 does not apply to leases used in the exploration or use of minerals, oil, natural gas or other similar non-regenerative resources. See Note 3-Leases for additional information regarding the Company’s adoption of this standard including policy elections and the impact to the condensed consolidated financial statements at March 31, 2019. Financial instruments with characteristics of liabilities and equity. On July 13, 2017, the FASB 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 assessed the new standard as it relates to warrants issued by the Company in December 2016, which contain a down round feature. The Company determined through an assessment of the warrants in relation to ASC 815-40, Derivatives and Hedging-Contracts in Entity’s Own Equity, that there were other provisions in the warrant agreement that precluded equity classification, including an option of the holder to receive the calculated fair value of the warrant from the Company in cash in the event of a “Fundamental Transaction,” as defined in the warrant agreement. Therefore, the Company will continue to classify the warrants as liabilities with changes in fair value recorded in other income in the condensed consolidated statement of operations in the period of the change.

Organization, Operations and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Organization and Operations

U.S. Energy Corp. (collectively with its wholly owned subsidiary, Energy One LLC, referred to as the “Company” in these Notes to Condensed Consolidated Financial Statements) was incorporated in the State of Wyoming on January 26, 1966. The Company’s principal business activities are focused in the acquisition, exploration and development of oil and natural gas properties in the United States.

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles (“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 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 for the year ended December 31, 2018. Our financial condition as of March 31, 2019, and operating results for the three months ended March 31, 2019, 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, 2019.

Liquidity and Going Concern

Liquidity and Going Concern

As of March 31, 2019, the Company had cash of $1.3 million, a working capital surplus of $1.7 million and an accumulated deficit of $127.1 million. At October 10, 2019, the Company had a cash balance of $1.7 million and accounts payable of approximately $0.4 million. During 2019, the Company has instituted measures to preserve liquidity by reducing the use of third-party contractors, cutting corporate overhead and eliminating other general and administrative costs.

However, our liquidity is affected to a large degree by commodity prices, which have fluctuated significantly during recent years. Currently, the Company does not have any commodity derivative contracts in place to protect it in the event of a downturn in commodity prices. In addition, as described in Note 8-Commitments, Contingencies and Related-Party Transactions the costs associated with the ongoing litigation during 2019 have been a significant use of the Company’s existing cash. Continued excessive legal fees associated with litigation could impair the Company’s liquidity profile. These factors raise substantial doubt about the Company’s ability to fund operations for the next twelve months and continue as a going concern. The accompanying condensed consolidated financial statements do not include adjustments relating to the recoverability and classification of recorded asset amounts or amounts of liabilities that might result from the outcome of this uncertainty.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with 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 natural gas reserves that are used in the calculation of depreciation, depletion, amortization and impairment of the carrying value of evaluated oil and natural gas properties; realizability of unevaluated properties; production and commodity price estimates used to record accrued oil and natural gas sales receivables; valuation of warrant 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 natural gas, these estimates could change in the near term and such changes could be material.

Principles of Consolidation

Principles of Consolidation

The accompanying financial statements include the accounts of U.S. Energy Corp. and its wholly owned subsidiary Energy One LLC (“Energy One”). All inter-company balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current period presentation of the accompanying financial statements.

Adopted and Recently Issued Accounting Pronouncements

Adopted and Recently Issued Accounting Pronouncements

Leases. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), followed by other related ASUs that targeted improvements and additional practical expedient options (collectively “ASU 2016-02”). The standard requires lessees to recognize right-of-use assets and lease payment liabilities on the balance sheet for leases representing the Company’s right to use the underlying assets for the lease term. Each lease that is recognized in the balance sheet will be classified as either finance or operating, with such classification affecting the pattern and classification of expense recognition in the consolidated statements of operations and presentation within the statements of cash flows.

The Company evaluated the impacts of ASU 2016-02, which included an analysis of contracts for office leases. As a non-operator of oil and natural gas properties, the Company is not subject to drilling rig agreements, well completion agreements, water handling agreements, or other contracts that include potential lease components. In addition, the scope of ASU 2016-02 does not apply to leases used in the exploration or use of minerals, oil, natural gas or other similar non-regenerative resources. See Note 3-Leases for additional information regarding the Company’s adoption of this standard including policy elections and the impact to the condensed consolidated financial statements at March 31, 2019.

Financial instruments with characteristics of liabilities and equity. On July 13, 2017, the FASB 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 assessed the new standard as it relates to warrants issued by the Company in December 2016, which contain a down round feature. The Company determined through an assessment of the warrants in relation to ASC 815-40, Derivatives and Hedging-Contracts in Entity’s Own Equity, that there were other provisions in the warrant agreement that precluded equity classification, including an option of the holder to receive the calculated fair value of the warrant from the Company in cash in the event of a “Fundamental Transaction,” as defined in the warrant agreement. Therefore, the Company will continue to classify the warrants as liabilities with changes in fair value recorded in other income in the condensed consolidated statement of operations in the period of the change.