Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Additional Information (Detail)

v2.4.1.9
Property and Equipment - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Property, Plant and Equipment [Abstract]      
Fully depreciated no longer in use computer software and hardware and furniture, fixtures and equipment write-off $ 1,100,000mmi_FullyDepreciatedNoLongerInUseComputerSoftwareHardwareAndFurnitureFixturesAndEquipmentWriteOff    
Depreciation and amortization expense on property and equipment 780,000us-gaap_DepreciationAndAmortization 775,000us-gaap_DepreciationAndAmortization  
Capital lease obligations     $ 0us-gaap_CapitalLeaseObligations