Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Options outstanding January 1,	920,346	859,182
Options outstanding, June 30,	1,154,516	1,310,012
Exercisable at June 30,	663,997	854,990
2012 Plan [Member]
Options granted under 2012 Plan	602,000	560,000
Options exercised under 2012 Plan	(367,830)	(94,170)
Options forfeited under 2012 Plan	0	(15,000)