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Document and Entity Information (USD $)
3 Months Ended
Sep. 30, 2011
Nov. 14, 2011
Sep. 30, 2010
Document And Entity Information   
Entity Registrant NameMEXCO ENERGY CORPORATION  
Entity Central Index Key0000066418  
Document Type10-Q  
Document Period End DateSep. 30, 2011
Amendment Flagfalse  
Current Fiscal Year End Date--03-31  
Is Entity a Well-known Seasoned Issuer?No  
Is Entity a Voluntary Filer?No  
Is Entity's Reporting Status Current?Yes  
Entity Filer CategorySmaller Reporting Company  
Entity Public Float  $ 4,635,410
Entity Common Stock, Shares Outstanding 2,027,949 
Document Fiscal Period FocusQ2  
Document Fiscal Year Focus2011