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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
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     21,419  
Retirement of senior common stock     (178)  
Distributions declared to common, senior common and preferred stockholders     (30,862)  
Net income $ (73) $ (96) $ 1,665 $ 1,030
Common Stock, ending balance (in shares) 23,601,153   23,601,153  
Senior Common Stock, ending balance (in shares) 959,552   959,552  
Total Stockholders' Equity, ending balance $ 225,915   $ 225,915  
Senior Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Retirement of senior common stock (in shares)     (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)     1,115,546  
Issuance of preferred stock series A and B and common stock, net     $ 2  
Common Stock, ending balance (in shares) 23,601,153   23,601,153  
Total Stockholders' Equity, ending balance $ 24   $ 24  
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     21,417  
Retirement of senior common stock     (178)  
Total Stockholders' Equity, ending balance 440,136   440,136  
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     (30,862)  
Net income     1,665  
Total Stockholders' Equity, ending balance $ (214,248)   $ (214,248)