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v3.19.2

Oil and Natural Gas Costs (Details Narrative) - $ / shares | Mar. 31, 2019 | Mar. 31, 2018
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Extractive Industries [Abstract] |  |
DD&A per BOE production | $ 9.45 | $ 10.02

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- Definition DD&A per BOE production. + References No definition available. + Details
Name: | MXC_DepreciationDepletionAndAmortizationBerolOfOilEquivalent
Namespace Prefix: | MXC_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | srt_ExtractiveIndustriesAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration