Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Summary Of Quarterly Financial Information Details Usd
Total Revenues	$ 9,017,072	$ 8,998,342	$ 8,722,632	$ 8,529,678	$ 8,667,246	$ 8,451,503	$ 8,313,691	$ 7,832,199	$ 35,267,724	$ 33,264,639	$ 30,470,240
Income (Loss) Before Taxes	913,915	(2,966,721)	208,594	(270,026)	(358,954)	(967,640)	182,673	(591,037)	(2,114,238)	(1,734,958)	1,296,505
Net Income (Loss)	$ 597,177	$ (1,953,497)	$ 151,030	$ (198,987)	$ (248,956)	$ (649,510)	$ 112,381	$ (396,785)	$ (1,404,277)	$ (1,182,870)	$ 846,361
Basic
Basic Earnings (Loss) Per Share	$ 0.11	$ (0.37)	$ 0.03	$ (0.04)	$ (.05)	$ (.12)	$ .02	$ (.07)	$ (0.26)	$ (.22)	$ 0.16
Diluted
Diluted Earnings (Loss) Per Share	$ 0.11	$ (0.37)	$ 0.03	$ (0.04)	$ (0.05)	$ (0.12)	$ 0.02	$ (0.07)	$ (0.26)	$ (.22)	$ 0.16