DISCONTINUED OPERATIONS (Details) (Jackson Trotting Association, LLC, USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Jackson Trotting Association, LLC
Discontinued operations
Percentage of interest held	90.00%
Recorded expense related to the settlement of a matter related to a former employee	$ 0.3

Represents the amount of recorded expense related to the settlement of a matter related to a former employee.

No definition available.

Name:	mntg_ExpensesRelatedToProposedSettlement
Namespace Prefix:	mntg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration