Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.4.0.3
Related-Party Transactions - Additional Information (Detail) - USD ($)
 3 Months Ended
Jul. 24, 2015
Jul. 01, 2015
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Related Party Transaction [Line Items]          
Due to Adviser and Administrator [1]     $ 1,898,000   $ 1,858,000
Annual base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses   1.50%      
Quarterly base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses   0.375%      
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock 2.00%        
Base management fee [1]     $ 861,000 $ 852,000  
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser   2.00% 1.75%    
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser   8.00% 7.00%    
Amount to be paid to Adviser in percentage of pre-incentive fee condition one   15.00% 100.00%    
Incentive fee description     However, in no event shall the incentive fee for a particular quarter exceed by 15.0% (the cap) the average quarterly incentive fee paid by us for the previous four quarters (excluding quarters for which no incentive fee was paid).    
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     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     2.1875%    
Incentive fee [1]     $ 618,000 1,673,000  
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser     $ 0 1,185,000 [1]  
Capital gains-based incentive fee percentage   15.00%      
Capital gains incentive fee description     At the end of the fiscal year, if this number is positive, then the capital gain fee payable for such time period shall equal 15.0% of such amount.    
Capital gain fee     $ 0 0  
Notice period for termination of agreement without cause   120 days      
Notice period for termination of agreement with cause   30 days      
Administration fee [1]     $ 404,000 362,000  
Dealer manager fee in percentage of gross proceeds of shares of Senior Common Stock sold     7.00%    
Sales commission fee in percentage of gross proceeds of shares of Senior Common Stock sold     3.00%    
Fees paid     $ 100,000 $ 40,000  
Financing fee on total secured mortgages percentage     0.43% 0.26%  
Minimum [Member]          
Related Party Transaction [Line Items]          
Percentage of the amount of the mortgage     0.15%    
Maximum [Member]          
Related Party Transaction [Line Items]          
Percentage of the amount of the mortgage     1.00%    
Amended Advisory Agreement [Member]          
Related Party Transaction [Line Items]          
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser     $ 0    
Dealer Manager [Member]          
Related Party Transaction [Line Items]          
Agreement termination date     Mar. 28, 2015    
Wrote-off of deferred offering costs     $ 100,000    
Payments made to the Dealer Manager pursuant to Dealer Manager Agreement       $ 300,000  
Adviser and Administrator [Member]          
Related Party Transaction [Line Items]          
Due to Adviser and Administrator     1,900,000   $ 1,900,000
Related-party transactions incentive fee, net     $ 600,000 $ 500,000  
[1] Refer to Note 2 "Related-Party Transactions"