Organization And Summary Of Significant Accounting Policies (Schedule Of Changes In Reserve) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Organization And Summary Of Significant Accounting Policies Schedule Of Changes In Reserve
Balance at beginning of the period	$ 194,061	$ 1,200,792
Accrued allowances	173,660	921,833
Reversal of prior year accrued allowances	1,749	58,867
Expenditures	(18,886)	(1,869,697)
Balance at period-end	$ 347,086	$ 194,061