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Concentration Of Credit Risk (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Concentration Of Credit Risk [Abstract]      
Threshold of not insured deposits by FDIC $ 250,000    
Cash and cash equivalents 20,810,018 18,042,258 8,117,031
Cash and cash equivalents, amount uninsured by FDIC 3,200,000 1,200,000  
Cash and cash equivalents uninsured amount after expiration of unlimited coverage for noninterest-bearing transaction accounts $ 20,300,000