Organization And Summary Of Significant Accounting Policies (Schedule Of Changes In Reserve) (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Organization And Summary Of Significant Accounting Policies Schedule Of Changes In Reserve
Balance at beginning of the period	$ 364,894	$ 194,061	$ 194,061
Accrued allowances			191,468
Reversal of prior year accrued allowances		$ 1,749	1,749
Expenditures	191,468		18,886
Balance at period-end	$ 258,446		$ 364,894