Deferred Charges And Liabilities (Schedule Of Deferred Credits, Or Regulatory Liabilities) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Regulatory Liabilities [Line Items]
Total deferred liabilities	$ 1,179,414	$ 1,802,389
Refundable Consumer Advances For Construction [Member]
Regulatory Liabilities [Line Items]
Total deferred liabilities	328,360	823,115
Estimated Initial Installation Costs For Meters [Member]
Regulatory Liabilities [Line Items]
Total deferred liabilities	118,854	105,274
Post Retirement Benefit Obligation [Member]
Regulatory Liabilities [Line Items]
Total deferred liabilities	$ 732,200	$ 874,000