Intangible asset - intellectual property (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Cash	$ 200
Fair value of warrants issued	800	0
Fair value of intangible asset contributed by non-controlling interest	819	0
Total	$ 1,819

AdjustmentsToAdditionalPaidInCapitalWarrantIssuedInConnectionWithAcquisitionOfIntangibleAssets

No definition available.

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