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v2.4.1.9

Notes Payable to Former Stockholders - Additional Information (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Debt Instrument [Line Items] |  |  |
Accrued interest expense pertaining to Notes | $ 540,000 us-gaap_InterestPayableCurrent |  | $ 396,000 us-gaap_InterestPayableCurrent
Interest expense | 583,000 us-gaap_InterestExpense | 404,000 us-gaap_InterestExpense |
Notes Payable to Former Stockholders [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest expense | $ 144,000 us-gaap_InterestExpense / us-gaap_ShortTermDebtTypeAxis = mmi_NotesPayableToFormerStockholdersMember | $ 152,000 us-gaap_InterestExpense / us-gaap_ShortTermDebtTypeAxis = mmi_NotesPayableToFormerStockholdersMember |
Restricted Stock - Notes Payable [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured notes interest rate | 5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_AwardTypeAxis = mmi_RestrictedStockNotesPayableMember |  |
Unsecured notes maturity date | Apr. 14, 2020 |  |
SARs - Notes Payable [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured notes interest rate | 5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_AwardTypeAxis = mmi_StockAppreciationRightsSarsNotesPayableMember |  |
Unsecured notes maturity date | Jun. 30, 2020 |  |

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- Definition Date when the notes payable to former stockholders is scheduled to be fully repaid. + References No definition available. + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 + Details
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- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e7018-107765 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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