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Investment in Available-for-Sale Securities (Details 1) (USD $)
Mar. 31, 2014
Dec. 31, 2013
Due within one year, Cost $ 1,058,930  
Due after one year through three years, Cost 748,657  
Due after three years, Cost 708,336  
Available-for-sale Securities, Amortized Cost, Total 2,515,923  
Due within one year, Fair Value 1,051,561  
Due after one year through three years, Fair Value 757,623  
Due after three years, Fair Value 702,606  
Available-for-sale Securities, Fair Value, Total $ 2,511,790 $ 2,526,542