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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2018
Sep. 10, 2019
Jun. 30, 2018
Document And Entity Information      
Entity Registrant Name US ENERGY CORP    
Entity Central Index Key 0000101594    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filer No    
Entity Current Reporting Status No    
Entity Interactive Data Current No    
Entity Filer Category Non-accelerated Filer    
Entity Small Business Flag true    
Entity Emerging Growth Company false    
Entity Ex Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 9,091,693
Entity Common Stock, Shares Outstanding   13,405,838  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2018