Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Options outstanding January 1,	1,004,014	920,346
Options outstanding, June 30,	1,068,005	1,169,516
Exercisable at June 30,	600,327	678,997
2012 Plan [Member]
Options granted under 2012 Plan	319,669	602,000
Options exercised under 2012 Plan	(512,509)	(352,830)
Options forfeited under 2012 Plan	(4,169)	0
2019 Plan [Member]
Options granted under 2012 Plan	264,831	0
Options forfeited under 2012 Plan	(3,831)	0