Name:	mgt_OperatingLeasesCommitmentsAndSecurityDepositLineItems
Namespace Prefix:	mgt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Total amount of operating leases expenses for rental deposit.

+ References

No definition available.

+ Details

Name:	mgt_OperatingLeasesExpensesForRentalDepositTotal
Namespace Prefix:	mgt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The element represents the operating leases rental payments terms.

+ References

No definition available.

+ Details

Name:	mgt_OperatingLeasesRentalPaymentsTerms
Namespace Prefix:	mgt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash outflow arising from refundable rental deposits.

+ References

No definition available.

+ Details

Name:	mgt_RefundableRentalDeposit
Namespace Prefix:	mgt_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of minimum lease payments to be received by the lessor for capital leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (b)

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+ Details

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

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Costs incurred and are directly related to generating license revenue. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Definition

Description of the terms of a settlement agreement which resolved the legal matter, including the nature of the consideration, timing of payment, and the nature of rights obtained or lost (for example, but not limited to, patent, trademark, copyright, license and franchise rights).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

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

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

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

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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

- Details

Name:	dei_LegalEntityAxis=mgt_HarrisonOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mgt_AgreementTypeAxis=mgt_StatsLicensingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mgt_PeriodTypeAxis=mgt_AprilJune2014Member
Namespace Prefix:
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- Details

Name:	mgt_PeriodTypeAxis=mgt_FebruaryMarch2014Member
Namespace Prefix:
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- Details

Name:	mgt_PeriodTypeAxis=mgt_Julyoctober2014Member
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- Details

Name:	mgt_PeriodTypeAxis=mgt_ThereafterDecember2015Member
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Data Type:	na
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- Details

Name:	us-gaap_LeaseArrangementTypeAxis=mgt_OperatingLeasesMember
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Operating leases and commitments (Details Textual) (USD $) In Thousands, unless otherwise specified	1 Months Ended		12 Months Ended
	Jan. 31, 2013	Sep. 30, 2011	Dec. 31, 2014	Dec. 31, 2013
Operating Leases Commitments And Security Deposit [Line Items]
Operating Leases Expenses For Rental Deposit Total		$ 240
Operating Leases Rental Payments Terms		39 months
Lease Expiration Date		Nov. 30, 2014
Loss Contingency, Settlement Agreement, Terms	twelve–month
Refundable Rental Deposit		39mgt_RefundableRentalDeposit
Operating Leases, Rent Expense, Net			113us-gaap_OperatingLeasesRentExpenseNet	145us-gaap_OperatingLeasesRentExpenseNet
Operating leases [Member]
Operating Leases Commitments And Security Deposit [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months			60
Stats Licensing Agreement [Member]
Operating Leases Commitments And Security Deposit [Line Items]
License Costs			186
February-march 2014 [Member]
Operating Leases Commitments And Security Deposit [Line Items]
License Costs			11
April-june 2014 [Member]
Operating Leases Commitments And Security Deposit [Line Items]
License Costs			26
July-October 2014 [Member]
Operating Leases Commitments And Security Deposit [Line Items]
License Costs			20
Thereafter December 2015 [Member]
Operating Leases Commitments And Security Deposit [Line Items]
License Costs			18
Harrison office [Member]
Operating Leases Commitments And Security Deposit [Line Items]
Capital Leases, Future Minimum Payments Receivable			$ 71