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Fair Value Disclosures (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Fair Value Disclosures (Textual) [Abstract]        
Property impairment charges $ 0 $ 540,118 $ 0 $ 540,118
Fair Value Disclosures (Additional Textual) [Abstract]        
Transfer between levels 0 0 0  
Fair Value Adjustments 0     0
Vacant Phoenix, AZ Property [Member]
       
Fair Value Disclosures (Textual) [Abstract]        
Property impairment charges   $ 540,118   $ 540,118