Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share
Potential common shares excluded from the calculation of diluted EPS	1,810,000	520,000	1,799,000	521,000
Basic EPS - Net Income
Net income	$ 1,431	$ 1,036	$ 961	$ 1,763
Shares	12,032,000	12,405,000	12,016,000	12,318,000
Per Share Amounts	$ 0.12	$ 0.08	$ 0.08	$ 0.14
Effect of dilutive securities - Dilutive effect of stock options
Shares	134,000	345,000	205,000	361,000
Diluted EPS - Adjusted net income
Adjusted net income	$ 1,431	$ 1,036	$ 961	$ 1,763
Shares	12,166,000	12,750,000	12,221,000	12,679,000
Per Share Amounts	$ 0.12	$ 0.08	$ 0.08	$ 0.14