Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.8.0.1
Related-Party Transactions - Additional Information (Detail)
 3 Months Ended
Jan. 10, 2017
quarter
Mar. 31, 2018
USD ($)
officer
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Related Party Transaction [Line Items]        
Number of executive officers | officer   2    
Amount due to Adviser and Administrator [1]   $ 2,385,000   $ 2,289,000
Annual base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 1.50%      
Quarterly base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 0.375%      
Base management fee [2]   1,295,000 $ 1,181,000  
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 2.00%      
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 8.00%      
Amount to be paid to Adviser in percentage of pre-incentive fee condition one (as percent) 15.00%      
Number of quarters used for the cap of average quarterly incentive fees | quarter 4      
Incentive fee [2]   696,000 569,000  
Portion of incentive fee waived   0 0  
Capital gains-based incentive fee (as percent) 15.00%      
Capital gain fee   0 0  
Notice period for termination of agreement without cause 120 days      
Percentage of independent directors to terminate the Amended Advisory Agreement (as percent) 66.67%      
Termination fee payable (as percent) 200.00%      
Notice period for termination of agreement with cause 30 days      
Administration fee [2]   387,000 $ 360,000  
Fees paid   $ 20,000    
Financing fee on total secured mortgages percentage (as percent)   0.25%    
Minimum        
Related Party Transaction [Line Items]        
Percentage of the amount of the mortgage (as percent)   0.15%    
Maximum        
Related Party Transaction [Line Items]        
Percentage of the amount of the mortgage (as percent)   1.00%    
[1] Refer to Note 2 "Related-Party Transactions"
[2] Refer to Note 2 “Related-Party Transactions”