Name:	mntg_IntangibleAssetsGrossIncludingGoodwill
Namespace Prefix:	mntg_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Gross amount, as of the balance sheet date, of the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable), in excess of the fair value of net assets acquired in one or more business combination transactions.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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The accumulated impairment losses related to goodwill as of the balance sheet date.

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- Details

Name:	us-gaap_GoodwillImpairedAccumulatedImpairmentLossAbstract
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- Details

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Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

No definition available.

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- Details

Name:	us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract
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The net carrying amount as of the balance sheet date of other indefinite-lived and finite-lived intangible assets that are not separately presented on the statement of financial position.

No definition available.