Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.5.0.2
Related-Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Related Party Transaction [Line Items]            
Aggregate principal amount outstanding for employee notes receivable $ 546,000 $ 546,000   $ 546,000   $ 382,000
MMC [Member]            
Related Party Transaction [Line Items]            
Accounts payable and other accrued expenses - related party     $ 661,000   $ 661,000 $ 96,000
Real estate brokerage commissions and financing fees from transactions with former parent, Marcus & Millichap Company   1,100,000 305,000 3,500,000 1,600,000  
Commission expenses for transactions with former parent, Marcus & Millichap Company   674,000 173,000 2,100,000 943,000  
Rent expense for lease   $ 253,000 219,000 759,000 474,500  
Lease expiration date   May 31, 2022        
MMC [Member] | Transition Services Agreement [Member]            
Related Party Transaction [Line Items]            
Selling, general and administrative expense   $ 61,000 $ 56,000 $ 185,000 $ 165,000  
Transition services agreement date   Oct. 01, 2013        
George M. Marcus [Member]            
Related Party Transaction [Line Items]            
Beneficial ownership percentage 55.20%