13. Unaudited Quarterly Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 1,717	$ 1,933	$ 1,987	$ 1,891	$ 1,724	$ 1,845	$ 1,894	$ 1,838	$ 7,527,439	$ 7,300,132	$ 7,376,073
Operating income	547	752	805	746	624	726	765	700	2,849,486	2,815,522	2,922,361
Net income before income taxes from continuing operations	(712)	705	754	693	66	665	567	605	1,439,943	1,902,188	2,531,503
Net income from continuing operations	(430)	427	456	418	40	402	342	365	871,537	1,148,731	1,528,774
Loss from discontinued operations	(780)				525				(780,440)	(524,588)	(709,816)
Net income (loss)	$ (1,210)	$ 427	$ 456	$ 418	$ (485)	$ 402	$ 342	$ 365	$ 91,097	$ 624,143	$ 818,958
Net income from continuing operations per common share
Basic	$ (0.02)	$ 0.02	$ 0.02	$ 0.02		$ 0.02	$ 0.02	$ 0.02	$ 0.05	$ 0.06	$ 0.08
Diluted	$ (0.02)	$ 0.02	$ 0.02	$ 0.02		$ 0.02	$ 0.02	$ 0.02	$ 0.05	$ 0.06	$ 0.08
Net income (loss) per common share
Basic	$ (0.06)	$ 0.02	$ 0.02	$ 0.02	$ (0.02)	$ 0.02	$ 0.02	$ 0.02	$ 0.01	$ 0.03	$ 0.04
Diluted	$ (0.06)	$ 0.02	$ 0.02	$ 0.02	$ (0.02)	$ 0.02	$ 0.02	$ 0.02