Stock-Based Compensation (Summary Of Status Of Company's Equity Compensations Plans) (Details) - Stock Options [Member] - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Shares [Roll Forward]
Outstanding, beginning of period (in shares)	1,311,604
Options Granted (in shares)	300,000	65,104
Exercised (in shares)	(74,000)	0
Expired (in shares)	(147,000)
Forfeited (in shares)	(8,000)
Outstanding, end of period (in shares)	1,382,604		1,311,604
Exercisable, end of period (in shares)	1,033,776
Weighted average exercise price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 8.24
Granted (in dollars per share)	6.87
Exercised (in dollars per share)	8.38
Expired (in dollars per share)	7.81
Forfeited (in dollars per share)	9.39
Outstanding, end of period (in dollars per share)	7.97		$ 8.24
Exercisable, end of period (in dollars per share)	$ 8.27
Weighted-average remaining contractual term [Abstract]
Granted	3 years 8 months 15 days
Outstanding	4 years 3 months 21 days		3 years 1 month 9 days
Exercisable, end of period	2 years 6 months 29 days
Aggregate intrinsic value [Abstract]
Outstanding, beginning of period	$ 6,203,523
Granted	531,000
Exercised	310,280
Expired
Forfeited
Outstanding, end of period	1,372,257		$ 6,203,523
Exercisable, end of period	$ 837,839