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Stock-Based Compensation; Changes in Equity (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Stock Option Plan 2001 [Member]	Apr. 12, 2001 Stock Option Plan 2001 [Member]	Jun. 30, 2012 Stock Option Plan 2002 [Member]	Apr. 24, 2002 Stock Option Plan 2002 [Member]	Jun. 30, 2012 Stock Option Plan 2007 [Member]	Apr. 30, 2007 Stock Option Plan 2007 [Member]	Jun. 30, 2012 Stock Option Plan 2009 [Member]	Apr. 10, 2009 Stock Option Plan 2009 [Member]
Common Stock, Dividend Rate, Percentage			1.14%
Allocated Share-based Compensation Expense	$ 22,000	$ 35,000	$ 44,000	$ 70,000
Unrecognized Compensation Expenses, Non Vested Stock	153,000		153,000
Expected Recognised Compensation Expenses, Reminder Of 2012			44,000
Expected Recognised Compensation Expenses, Year 2013			59,000
Expected Recognised Compensation Expenses, Year 2014			41,000
Expected Recognised Compensation Expenses, Year 2015			9,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						119,050		142,860		150,000		250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant					139,958		123,430		165,750		82,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number					7,500		27,500		32,500		80,500
Common Stock, Dividends, Per Share, Declared			$ 0.05
Dividends, Common Stock, Cash	$ 158,000
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Forfeitures In Period			1,000

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The percentage rate used to calculate dividend payments on Common stock.

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