Basic and Diluted Income (Loss) Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Numerator:
Net income	$ 816	$ 858	$ 1,504	$ 1,627
Denominator:
Weighted-average shares outstanding for basic earnings per share (in shares)	18,390,034	18,879,757	18,370,907	19,101,284
Effect of dilutive securities:
Employee stock options (in shares)	69,900	112,841	112,235	202,913
Adjusted weighted-average shares outstanding and assumed conversions for diluted earnings per share (in shares)	18,459,934	18,992,598	18,483,142	19,304,197
Shares related to dilutive securities excluded because inclusion would be anti-dilutive (in shares)	2,847,203	1,573,896	2,799,268	1,544,504