Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Feb. 23, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 001-36155    
Entity Registrant Name MARCUS & MILLICHAP, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 35-2478370    
Entity Address, Address Line One 23975 Park Sorrento, Suite 400    
Entity Address, City or Town Calabasas    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 91302    
City Area Code 818    
Local Phone Number 212-2250    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol MMI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 906.9
Entity Common Stock, Shares Outstanding   39,243,988  
Entity Central Index Key 0001578732    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer