Stock Option Plans (Details 2) (Board Of Directors Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Exercise Prices	$ 3.30	$ 5.98	$ 9.42	$ 9.42
Number Outstanding	145,250	55,250	100,250	100,250
Options Outstanding, Weighted Average Remaining Life	7 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 3.30
Options, Number Exercisable	55,250	55,250	91,025
Options Exercisable, Weighted Average Exercise Price	$ 5.98
Exercise Price One [Member]
Exercise Prices	$ 5.44
Number Outstanding	16,000
Options Outstanding, Weighted Average Remaining Life	1 year 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 5.44
Options, Number Exercisable	16,000
Options Exercisable, Weighted Average Exercise Price	$ 5.44
Exercise Price Two [Member]
Exercise Prices	$ 9.23
Number Outstanding	8,000
Options Outstanding, Weighted Average Remaining Life	2 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 9.23
Options, Number Exercisable	8,000
Options Exercisable, Weighted Average Exercise Price	$ 9.23
Exercise Price Three [Member]
Exercise Prices	$ 7.99
Number Outstanding	12,800
Options Outstanding, Weighted Average Remaining Life	5 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 7.99
Options, Number Exercisable	12,800
Options Exercisable, Weighted Average Exercise Price	$ 7.99
Exercise Price Four [Member]
Exercise Prices	$ 3.60
Number Outstanding	18,450
Options Outstanding, Weighted Average Remaining Life	6 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 3.60
Options, Number Exercisable	18,450
Options Exercisable, Weighted Average Exercise Price	$ 3.60
Exercise Price Five [Member]
Exercise Prices	$ 1.65
Number Outstanding	90,000
Options Outstanding, Weighted Average Remaining Life	9 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.65
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0