Summary of Significant Accounting and Reporting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) - Allowance for Doubtful Accounts - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Activity in the Company’s allowance for doubtful accounts
Beginning Balance	$ 2,746,647	$ 2,714,533	$ 2,917,424
Net Additions/ (Reductions) to Costs and Expenses	0	0	0
Deductions and Other Adjustments	(295,354)	32,114	(202,891)
Ending Balance	$ 2,451,293	$ 2,746,647	$ 2,714,533