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Long-Term Debt And Credit Facilities (Schedule Of Debt Outstanding) (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total long term debt $ 18,078,308 $ 18,080,159
Carrying Amount [Member]    
Debt Instrument [Line Items]    
Total debt $ 18,078,308 $ 18,080,159
Less current maturities
Total long term debt $ 18,078,308 $ 18,080,159
Estimated Fair Value [Member]    
Debt Instrument [Line Items]    
Total debt $ 18,398,347 $ 18,429,177
Less current maturities
Total long term debt $ 18,398,347 $ 18,429,177