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General and Administrative Expenses (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Composition of general and administrative expenses by the principal operations        
General and Administrative Expenses $ 276,626 $ 316,528    
Total $ (276,626) $ 316,528 $ 479,064 $ 140,121