Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Summary Of Quarterly Financial Information Details
Total Revenues	$ 8,001,419	$ 8,161,034	$ 8,643,452	$ 8,806,891	$ 9,296,290	$ 9,293,389	$ 9,241,306	$ 8,960,497	$ 33,612,796	$ 36,791,482
Income (Loss) Before Taxes	(589,752)	(812,141)	287,032	(2,811,931)	(826,821)	(4,435,225)	(1,350,826)	(3,267,349)	(3,926,792)	(9,880,221)
Net Income (Loss)	$ (468,680)	$ (661,925)	$ 168,297	$ (2,207,251)	$ (2,759,748)	$ (2,927,249)	$ (890,735)	$ (2,147,252)	$ (3,169,559)	$ (8,724,984)
Basic
Basic Earnings (Loss) Per Share	$ (0.09)	$ (0.12)	$ 0.03	$ (0.42)	$ (0.52)	$ (0.55)	$ (0.17)	$ (0.40)	$ (0.60)	$ (1.64)
Diluted
Diluted Earnings (Loss) Per Share	$ (0.09)	$ (0.12)	$ 0.03	$ (0.42)	$ (0.52)	$ (0.55)	$ (0.17)	$ (0.40)	$ (0.60)	$ (1.64)