Custom Element.

No definition available.

Name:	MEEC_ExercisePriceMaximum
Namespace Prefix:	MEEC_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Custom Element.

No definition available.

Name:	MEEC_ExercisePriceMinimum
Namespace Prefix:	MEEC_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Custom Element.

No definition available.

Name:	MEEC_ExercisePriceWarrants
Namespace Prefix:	MEEC_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Custom Element.

No definition available.

Name:	MEEC_NumberOutstanding
Namespace Prefix:	MEEC_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Custom Element.

No definition available.

Name:	MEEC_WeightedAverageExercisePrice
Namespace Prefix:	MEEC_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Custom Element.

No definition available.

Name:	MEEC_WeightedAverageRemainingContractualLifeYears
Namespace Prefix:	MEEC_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_WarrantsAndRightsNoteDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration