COMMITMENTS AND CONTINGENCIES (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2013
Lease Expiration Period	2018
Operating Leases Future Minimum Payments Due Excluded From Payment Calculation	$ 2.1
Contingent Liability	$ 0.5

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year, which are expected to receive but excluded from payment calculation.

No definition available.

Name:	mmab_OperatingLeasesFutureMinimumPaymentsDueExcludedFromPaymentCalculation
Namespace Prefix:	mmab_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant