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Investment in Available-for-Sale Securities (Details 1) - Major Types of Debt and Equity Securities [Domain] - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Due within one year, Cost $ 667,289  
Due after one year through three years, Cost 1,159,142  
Due after three years, Cost 347,937  
Available-for-sale Securities, Amortized Cost, Total 2,174,368  
Due within one year, Fair Value 663,362  
Due after one year through three years, Fair Value 1,170,996  
Due after three years, Fair Value 346,624  
Available-for-sale Securities, Fair Value, Total $ 2,180,982 $ 1,932,801