Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

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Related-Party Transactions - Additional Information (Detail)
 1 Months Ended 3 Months Ended
Jul. 01, 2015
quarter
Jul. 31, 2015
Mar. 31, 2017
USD ($)
officer
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Related Party Transaction [Line Items]          
Number of executive officers | officer     2    
Due to Adviser and Administrator [1]     $ 2,103,000   $ 2,075,000
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%        
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock (as percent) 2.00%        
Base management fee [2]     $ 1,181,000 $ 861,000  
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 2.00%   1.75%    
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 8.00%   7.00%    
Amount to be paid to Adviser in percentage of pre-incentive fee condition one (as percent) 15.00%   100.00%    
Number of quarters used for the cap of average quarterly incentive fees | quarter 4        
Pre-incentive fee in percentage of common stockholders' equity that awards Adviser hundred percent of amount of pre-incentive fee, maximum percentage     2.1875%    
Amount to be paid to Adviser in percentage of pre-incentive fee condition two (as percent)     20.00%    
Pre-incentive fee in percentage of common stockholders' equity that awards the Adviser 20% of the amount of the pre-incentive fee, minimum percentage (as percent)     2.1875%    
Incentive fee [2]     $ 569,000 618,000  
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)     66670.00%    
Termination fee payable (as percent)   200.00%      
Notice period for termination of agreement with cause 30 days        
Administration fee [2]     $ 360,000 404,000  
Fees paid     $ 0 $ 80,000  
Financing fee on total secured mortgages percentage (as percent)       0.43%  
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”