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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws expiring on 2034.

No definition available.

Name:	mara_OperatingLossCarryforwardsExpiringOn2034
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Data Type:	xbrli:monetaryItemType
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws expiring on 2035.

No definition available.

Name:	mara_OperatingLossCarryforwardsExpiringOn2035
Namespace Prefix:	mara_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.