Discontinued Operations (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discontinued Operations [Abstract]
Discontinued operations, gain on sale of subsidiary	$ 65,000	$ 62,000	$ 55,000
Discontinued operations, contingent lease reserve	100,000
Discontinued operations, maximum lease obligation	$ 200,000