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Condensed Balance Sheets (Unaudited) (Parenthetical) (USD $)
Sep. 30, 2011
Dec. 31, 2010
Condensed Balance Sheets [Abstract]    
Leasing commissions, less accumulated amortization $ 2,972,681 $ 2,742,063
Mortgage refinancing costs, less accumulated amortization 1,734,326 1,461,613
Participation units, outstanding 700 700
Amount of participation unit $ 10,000 $ 10,000