Quarterly report pursuant to Section 13 or 15(d)

Stockholders' and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail)

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Stockholders' and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Preferred Stock, beginning balance (in shares)     2,150,000  
Common Stock, beginning balance (in shares)     22,485,607  
Senior Common Stock, beginning balance (in shares)     972,214  
Total Stockholders' Equity, beginning balance     $ 233,871  
Issuance of preferred stock series A and B and common stock, net     $ 10,890  
Retirement of senior common stock     (178,000)  
Distributions declared to common, senior common and preferred stockholders     $ (19,766)  
Net income $ 883 $ 431 $ 1,738 $ 1,125
Preferred Stock, ending balance (in shares) 2,264,000   2,264,000  
Common Stock, ending balance (in shares) 22,983,604   22,983,604  
Senior Common Stock, ending balance (in shares) 959,552   959,552  
Total Stockholders' Equity, ending balance $ 226,555   $ 226,555  
Senior Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Retirement of senior common stock     (12,662)  
Preferred Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Preferred Stock, beginning balance (in shares)     2,150,000  
Total Stockholders' Equity, beginning balance     $ 2  
Issuance of preferred stock and common stock, net (in shares)     114,000  
Preferred Stock, ending balance (in shares) 2,264,000   2,264,000  
Total Stockholders' Equity, ending balance $ 2   $ 2  
Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Common Stock, beginning balance (in shares)     22,485,607  
Total Stockholders' Equity, beginning balance     $ 22  
Issuance of preferred stock and common stock, net (in shares)     497,997  
Issuance of preferred stock series A and B and common stock, net     $ 1  
Common Stock, ending balance (in shares) 22,983,604   22,983,604  
Total Stockholders' Equity, ending balance $ 23   $ 23  
Common Stock [Member] | Senior Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Senior Common Stock, beginning balance (in shares)     972,214  
Total Stockholders' Equity, beginning balance     $ 1  
Senior Common Stock, ending balance (in shares) 959,552   959,552  
Total Stockholders' Equity, ending balance $ 1   $ 1  
Additional Paid in Capital [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Total Stockholders' Equity, beginning balance     418,897  
Issuance of preferred stock series A and B and common stock, net     $ 10,889  
Retirement of senior common stock     (178,000)  
Total Stockholders' Equity, ending balance 429,608   $ 429,608  
Distributions in Excess of Accumulated Earnings [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Total Stockholders' Equity, beginning balance     (185,051)  
Distributions declared to common, senior common and preferred stockholders     (19,766)  
Net income     1,738  
Total Stockholders' Equity, ending balance $ (203,079)   $ (203,079)