| Summary of Changes in Stockholders' Equity | 
        
 
 The following table summarizes the changes in our
 stockholders’ equity for the nine months ended
 September 30, 2014: 
 
   
 
 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  
 
 |   | 
    | 
 Common Stock | 
   | 
    | 
 
Additional 
 Paid-in Capital
 | 
   | 
    | 
 
Distributions 
 in Excess of 
 Earnings
 | 
   | 
   | 
 
Total 
 Stockholders’ 
 Equity
 | 
   | 
  
 
 |   | 
    | 
 
Number 
 of Shares
 | 
   | 
    | 
 Par Value | 
   | 
    | 
    | 
   | 
  
 
 |   | 
    | 
    | 
    | 
    | 
   | 
  
 
 | 
  
 Balance at December 31, 2013 
  | 
    | 
   | 
 6,530,264 | 
    | 
    | 
 $ | 
 6,530 | 
    | 
    | 
 $ | 
 51,326,262 | 
    | 
    | 
 $ | 
 (2,820,800 | 
 )  | 
   | 
 $ | 
 48,511,992 | 
    | 
  
 
 | 
  
 Net loss 
  | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 (179,803 | 
 )  | 
   | 
   | 
 (179,803 | 
 )  | 
  
 
 | 
  
 Proceeds from issuance of common stock, net 
  | 
    | 
   | 
 1,150,000 | 
    | 
    | 
   | 
 1,150 | 
    | 
    | 
   | 
 13,219,525 | 
    | 
    | 
   | 
 
 —   | 
    | 
   | 
   | 
 13,220,675 | 
    | 
  
 
 | 
  
 Distributions 
  | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 
 —   | 
    | 
    | 
   | 
 (1,763,171 | 
 )  | 
   | 
   | 
 (1,763,171 | 
 )  | 
  
 
  | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
   | 
 
    
  | 
 
    
  | 
   | 
  
 
 | 
  
 Balance at September 30, 2014 
  | 
    | 
   | 
 7,680,264 | 
    | 
    | 
 $ | 
 7,680 | 
    | 
    | 
 $ | 
 64,545,787 | 
    | 
    | 
 $ | 
 (4,763,774 | 
 )  | 
   | 
 $ | 
 59,789,693 | 
    | 
  
 
  | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
    | 
 
    
  | 
 
    
  | 
   | 
   | 
 
    
  | 
 
    
  | 
   | 
  
  
  
 | 
      
      
        | Monthly Distributions Declared and Paid by Company's Board of Directors | 
        
 
 Our Board of Directors declared and paid the following monthly
 distributions to common stockholders for the nine months ended
 September 30, 2014 and 2013: 
 
   
 
 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  
 
 | 
  
 Fiscal Year 
  | 
    | 
 Declaration Date | 
    | 
 Record Date | 
    | 
 Payment Date | 
    | 
 
Distribution 
 per Common Share
 | 
   | 
  
 
 |    | 
    | 
    | 
    | 
  
 
 | 
  
 2014 
  | 
    | 
 January 7, 2014 | 
    | 
 January 22, 2014 | 
    | 
 January 31, 2014 | 
    | 
 $ | 
  0.03 | 
    | 
  
 
  | 
    | 
 January 7, 2014 | 
    | 
 February 19, 2014 | 
    | 
 February 28, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 January 7, 2014 | 
    | 
 March 17, 2014 | 
    | 
 March 31, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 April 8, 2014 | 
    | 
 April 21, 2014 | 
    | 
 April 30, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 April 8, 2014 | 
    | 
 May 20, 2014 | 
    | 
 May 30, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 April 8, 2014 | 
    | 
 June 19, 2014 | 
    | 
 June 30, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 July 15, 2014 | 
    | 
 July 25, 2014 | 
    | 
 August 5, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 July 15, 2014 | 
    | 
 August 20, 2014 | 
    | 
 August 29, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
 July 15, 2014 | 
    | 
 September 19, 2014 | 
    | 
 September 30, 2014 | 
    | 
   | 
 0.03 | 
    | 
  
 
  | 
    | 
  | 
    | 
  | 
    | 
  | 
    | 
 
    
  | 
 
    
  | 
   | 
  
 
 | 
  Nine months ended September 30, 2014 
  | 
    | 
 $ | 
 0.27 | 
    | 
  
 
  | 
    | 
  | 
    | 
  | 
    | 
  | 
    | 
 
    
  | 
 
    
  | 
   | 
  
 
 | 
  
 2013 
  | 
    | 
 February 5, 2013 | 
    | 
 February 15, 2013 | 
    | 
 February 28, 2013 | 
    | 
 $ | 
 0.04 | 
    | 
  
 
  | 
    | 
 February 5, 2013 | 
    | 
 March 15, 2013 | 
    | 
 March 28, 2013 | 
    | 
   | 
 0.04 | 
    | 
  
 
  | 
    | 
 April 9, 2013 | 
    | 
 April 22, 2013 | 
    | 
 April 30, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
 April 9, 2013 | 
    | 
 May 20, 2013 | 
    | 
 May 31, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
 April 9, 2013 | 
    | 
 June 19, 2013 | 
    | 
 June 28, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
 July 9, 2013 | 
    | 
 July 19, 2013 | 
    | 
 July 31, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
 July 9, 2013 | 
    | 
 August 21, 2013 | 
    | 
 August 30, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
 July 9, 2013 | 
    | 
 
 September 18, 2013 | 
    | 
 
 September 30, 2013 | 
    | 
   | 
 0.12 | 
    | 
  
 
  | 
    | 
  | 
    | 
  | 
    | 
  | 
    | 
 
    
  | 
 
    
  | 
   | 
  
 
 | 
  
 Nine months ended September 30, 2013 
  | 
    | 
 $ | 
 0.80 | 
    | 
  
 
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    | 
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    | 
 
    
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