Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Detail)

v3.4.0.3
Equity - Additional Information (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Aug. 07, 2015
Apr. 02, 2014
Subsidiary, Sale of Stock [Line Items]          
Common stock, par value $ 0.001 $ 0.001 $ 0.001    
Common stock, shares authorized 20,000,000 20,000,000 20,000,000    
Common stock, shares issued 9,992,941 9,992,941 9,992,941    
Common stock, shares outstanding 9,992,941 9,992,941 9,992,941    
Company's ownership percent 93.10% 93.10% 100.00%    
Conversion of stock description   On or after 12 months after becoming a holder of OP Units, each limited partner, other than the Company, has the right, subject to the terms and conditions set forth in the partnership agreement of the Operating Partnership, to require the Operating Partnership to redeem all or a portion of such units in exchange for cash or, at the Company’s option, shares of our common stock on a one-for-one basis.      
OP units held by non-controlling limited partners   745,879      
At-the-Market Program [Member]          
Subsidiary, Sale of Stock [Line Items]          
Sale of common stock sold under sale agreement 32,627 0      
Average sales price of common stock sold $ 9.19 $ 9.19      
Gross proceeds from issuance of common stock $ 300,000        
Net proceeds from issuance of common stock $ 295,000        
Maximum [Member]          
Subsidiary, Sale of Stock [Line Items]          
Securities allowed for issuance         $ 300,000,000
Maximum [Member] | At-the-Market Program [Member]          
Subsidiary, Sale of Stock [Line Items]          
Common stock, value authorized       $ 30,000,000  
Common Stock [Member]          
Subsidiary, Sale of Stock [Line Items]          
Value of common stock issuable per registration statement   $ 23,300,000      
Common Stock [Member] | Universal Registration Statement [Member]          
Subsidiary, Sale of Stock [Line Items]          
Common stock, shares issued 2,156,080 2,156,080