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Investments In Securities Investments In Securities (Schedule Of Estimated Fair Value Hierarchy Of Investments And Related Impairments Recognized) (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure $ 0 $ 163,350
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss 0 (233,069)
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure 0 0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure $ 0 $ 163,350
Cost-method Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value assets measured on non-recurring basis valuation method Fair Value Fair Value
Fair Value Assets Measured On Non Recurring Basis Impaired Yes Or No No Yes
Investments, Fair Value Disclosure $ 0 $ 163,350
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss 0 (233,069)
Cost-method Investments [Member] | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure 0 0
Cost-method Investments [Member] | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure 0 0
Cost-method Investments [Member] | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, Fair Value Disclosure $ 0 $ 163,350