Quarterly report pursuant to Section 13 or 15(d)

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

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Stockholders' Equity - Summary of Changes in Stockholders' Equity (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Class of Stock [Line Items]        
Beginning balance, Par Value     $ 48,511,992  
Net loss 100,375 4,760 (179,803) 82,633
Proceeds from issuance of common stock, net, Value     13,220,675  
Distributions     (1,763,171)  
Ending balance, Par Value 59,789,693   59,789,693  
Common Stock [Member]
        
Class of Stock [Line Items]        
Beginning balance, Shares     6,530,264  
Beginning balance, Par Value     6,530  
Proceeds from issuance of common stock, net     1,150,000  
Proceeds from issuance of common stock, net, Value     1,150  
Ending balance, Shares 7,680,264   7,680,264  
Ending balance, Par Value 7,680   7,680  
Additional Paid-in Capital [Member]
        
Class of Stock [Line Items]        
Beginning balance, Par Value     51,326,262  
Proceeds from issuance of common stock, net, Value     13,219,525  
Ending balance, Par Value 64,545,787   64,545,787  
Retained Earnings (Distributions in Excess of Earnings) [Member]
        
Class of Stock [Line Items]        
Beginning balance, Par Value     (2,820,800)  
Net loss     (179,803)  
Distributions     (1,763,171)  
Ending balance, Par Value $ (4,763,774)   $ (4,763,774)