Marcus & Millichap, Inc. Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.22.0.1

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
State and Canadian net operating losses (NOLs)	$ 14,700,000	$ 15,400,000
State and Canadian net operating losses (NOLs), expiration year	2033
Valuation allowance, deferred tax assets	$ 4,599,000	4,418,000
Change in valuation allowance, deferred tax assets	179,000	497,000	$ 1,400,000
Decrease in unrecognized tax benefits that is reasonably possible	56,000
Unrecognized tax benefits related to penalties	$ 0	13,000
Income Tax Examination, Description	The Company is currently under income tax examination by the state of New York.
Undistributed earnings of foreign subsidiary	$ 0	$ 0
Increase in unrecognized tax benefits that is reasonably possible	304,000
Unrecognized tax benefits that would impact effective tax rate	$ 0
Minimum [Member]
Income Taxes [Line Items]
Open tax years subject to tax examinations	2017
Maximum [Member]
Income Taxes [Line Items]
Open tax years subject to tax examinations	2021

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Income Taxes [Line Items]

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

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Tax year that remains open to examination under enacted tax laws, in YYYY format.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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