Intangible asset - intellectual property (restated) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Cash	$ 200
Fair value of warrants issued	851	0
Fair value of intangible asset contributed by non-controlling interest	862	0
Total	$ 1,913

AdjustmentsToAdditionalPaidInCapitalWarrantIssuedInConnectionWithAcquisitionOfIntangibleAssets

No definition available.

Name:	mgt_AdjustmentsToAdditionalPaidInCapitalWarrantIssuedInConnectionWithAcquisitionOfIntangibleAssets
Namespace Prefix:	mgt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration