Organization And Summary of Significant Accounting Policies (Schedule Of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions) (Details) - Employee Stock Purchase [Member]	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	45.00%	22.00%
Weighted average volatility	42.00%	29.00%
Risk free interest rate	0.20%	0.00%
Expected term	1 year	1 year
Expected dividend	0.00%	0.00%