Equity investment commitment in limited partnership.

No definition available.

Name:	MXC_EquityInvestmentCommitmentInLimitedPartnership
Namespace Prefix:	MXC_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Limited partnership capitalized to purchase mineral interests.

+ References

No definition available.

+ Details

Name:	MXC_LimitedPartnershipCapitalizedToPurchaseMineralInterests
Namespace Prefix:	MXC_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=MXC_ThroughJuneTwentyOneTwoThousandNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details Narrative) - USD ($)	Jun. 18, 2019	Apr. 12, 2019	Mar. 31, 2019
First quarter of fiscal 2020 [Member]
Credit facility, maximum borrowing			$ 225,000
Subsequent Event [Member]
Equity investment commitment in limited partnership		$ 250,000
Limited partnership capitalized to purchase mineral interests		50,000,000
Proceeds from promissory note in connection with settlement of lawsuit	$ 30,984
Subsequent Event [Member] \| Through June 21, 2019 [Member]
Equity investment commitment in limited partnership		$ 75,000