Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Summary Of Quarterly Financial Information Details Usd
Total Revenues	$ 9,296,290	$ 9,293,389	$ 9,241,306	$ 8,960,497	$ 9,017,072	$ 8,998,342	$ 8,722,632	$ 8,529,678	$ 36,791,482	$ 35,267,724
Income (Loss) Before Taxes	(826,821)	(4,435,225)	(1,350,826)	(3,267,349)	913,915	(2,966,721)	208,594	(270,026)	(9,880,221)	(2,114,238)
Net Income (Loss)	$ (2,759,748)	$ (2,927,249)	$ (890,735)	$ (2,147,252)	$ 597,177	$ (1,953,497)	$ 151,030	$ (198,987)	$ (8,724,984)	$ (1,404,277)
Basic
Basic Earnings (Loss) Per Share	$ (0.52)	$ (0.55)	$ (0.17)	$ (0.40)	$ 0.11	$ (0.37)	$ 0.03	$ (0.04)	$ (1.64)	$ (0.26)
Diluted
Diluted Earnings (Loss) Per Share	$ (0.52)	$ (0.55)	$ (0.17)	$ (0.40)	$ 0.11	$ (0.37)	$ 0.03	$ (0.04)	$ (1.64)	$ (0.26)