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 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Class of Stock [Line Items]        
Beginning balance, Par Value     $ 8,136,726  
Net income 30,356 164,473 77,872 316,977
Proceeds from issuance of common stock, net, Value     51,330,042  
Distributions     (2,873,316)  
Ending balance, Par Value 56,671,324   56,671,324  
Common Stock [Member]
       
Class of Stock [Line Items]        
Beginning balance, Shares     2,750,000  
Beginning balance, Par Value     2,750  
Proceeds from issuance of common stock, net, Shares     3,780,264  
Proceeds from issuance of common stock, net, Value     3,780  
Ending balance, shares 6,530,264   6,530,264  
Ending balance, Par Value 6,530   6,530  
Additional Paid-in Capital [Member]
       
Class of Stock [Line Items]        
Proceeds from issuance of common stock, net, Value     51,326,262  
Ending balance, Par Value 51,326,262   51,326,262  
Retained Earnings [Member]
       
Class of Stock [Line Items]        
Beginning balance, Par Value     8,133,976  
Net income     77,872  
Distributions     (2,873,316)  
Ending balance, Par Value $ 5,338,532   $ 5,338,532