Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Options outstanding, January 1	920,346	859,182
Options outstanding, March 31	1,169,516	1,404,182
Options exercisable, March 31	678,997	949,160
2012 Plan [Member]
Options granted	602,000	560,000
Options exercised	(352,830)	0
Options forfeited	0	(15,000)