Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details Textual)

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Stockholders' Equity (Details Textual) (USD $)
 1 Months Ended 12 Months Ended
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Stockholders Equity (Textual) [Abstract]        
Preferred stock outstanding   2,150,000 2,150,000  
Common stock, shares issued   11,083,584 11,083,584  
Common stock, par value   $ 0.001 $ 0.001  
Senior common stock ongoing offering, gross proceeds   $ 4,191,000 $ 39,707,000 $ 4,127,000
Stockholders' Equity (Additional Textual) [Abstract]        
Capital gains   0.00% 0.00% 0.00%
Maximum aggregate sales price of shares to be issued under open market sale agreement   25,000,000    
Number of shares sold under open market sale agreement   330,570    
Net proceeds of shares sold under open market sale agreement   6,100,000 [1]    
Maximum remaining capacity to sell common stock under open market sale agreement   18,900,000    
Shares intended to be offered pursuant to primary offering 3,000,000      
Shares intended to be offered pursuant to senior common distribution reinvestment plan 500,000      
Senior Common Stock [Member]
        
Stockholders Equity (Textual) [Abstract]        
Common stock, shares issued 3,500,000      
Common stock, par value 0.001 [1]      
Common stock shares issued, selling price 15.00      
Shares of senior common stock sold in ongoing offering 118,738      
Shares of senior common stock issued 1,395      
Senior common stock ongoing offering, gross proceeds   $ 1,800,000    
Series C Preferred Stock [Member]
        
Stockholders Equity (Textual) [Abstract]        
Preferred stock outstanding     0 0
[1] Refer to Note 2 "Related-Party Transactions"