Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.22.2
Related-Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]          
Aggregate principal amount for employee notes receivable $ 16,000   $ 16,000   $ 40,000
MMC [Member]          
Related Party Transaction [Line Items]          
Real estate brokerage commissions and financing fees from transactions with subsidiaries of Marcus & Millichap Company 912,000 $ 337,000 2,510,000 $ 794,000  
Commission expenses for transactions with subsidiaries of Marcus & Millichap Company 547,000 203,000 1,501,000 477,000  
Operating lease cost 320,000 $ 332,000 $ 653,000 665,000  
Lease expiration date     May 31, 2023    
Accounts payable and other liabilities - related party $ 11,000   $ 11,000   $ 93,000
MMC [Member] | Transition Services Agreement [Member]          
Related Party Transaction [Line Items]          
Selling, general and administrative expense     $ 18,000 $ 4,000  
George M. Marcus [Member]          
Related Party Transaction [Line Items]          
Beneficial ownership percentage     38.00%