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Oil and Natural Gas Costs (Details Narrative) - $ / shares	Mar. 31, 2019	Mar. 31, 2018
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