Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Options outstanding January 1,	920,346	859,182
Options outstanding, June 30,	1,090,353	1,140,844
Exercisable at June 30,	599,834	697,490
2012 Plan [Member]
Options granted under 2012 Plan	602,000	560,000
Options exercised under 2012 Plan	(431,993)	(241,669)
Options forfeited under 2012 Plan	0	(30,001)
Two Thousand Five Stock Option Plan [Member]
Options forfeited under 2012 Plan	0	(6,668)