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Fair Value of Financial Instruments (Valuation of Securities Using Fair Value Hierarchy) (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
United States
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities, fair value $ (1,609,150) $ 1,642,450
Short-Term Investments
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities, fair value 45,155,204 59,154,742
Fair Value, Inputs, Level 1 | United States
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities, fair value (1,609,150) 1,642,450
Fair Value, Inputs, Level 1 | Short-Term Investments
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities, fair value $ 45,155,204 $ 59,154,742