Marcus & Millichap, Inc. Quarterly report pursuant to Section 13 or 15(d)

Description of Business, Basis of Presentation and Recent Accounting Pronouncements - Narrative (Detail)

v3.22.2.2

Description of Business, Basis of Presentation and Recent Accounting Pronouncements - Narrative (Detail) - office	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Class of Stock [Line Items]
Number of offices			82
Percentage of common stock distributed			80.00%
Commission's receivable settled period			10 days
Guarantee obligations			16.70%
Total Revenues \| Geographic Concentration Risk \| Canada \| Customer
Class of Stock [Line Items]
Concentration risk percentage	1.50%	2.20%	2.00%	2.20%

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Number of office.

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Percentage of company post IPO common stock distributed by the Parent company before the IPO in the IPO.

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Period of settlement for receivable balances.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Indicates, if estimable, (as a percentage) the approximate extent to which the proceeds from liquidation of any assets held either as collateral or by third parties would be expected to cover the maximum potential amount of future payments under the guarantee or each group of similar guarantees.

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