Summary of Significant Accounting and Reporting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) - Allowance for Doubtful Accounts - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Activity in the Company’s allowance for doubtful accounts
Beginning Balance	$ 2,451,293	$ 2,746,647	$ 2,714,533
Net Additions/ (Reductions) to Costs and Expenses	1,000,000	0	0
Net Additions/Deductions and Other Adjustments	13,454	(295,354)	32,114
Ending Balance	$ 3,464,747	$ 2,451,293	$ 2,746,647