Summary of Significant Accounting Policies (Details 4) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income (Loss) Per Share
Denominator for basic net income (loss) per share - weighted average shares	13,230,000	13,602,000	13,515,000	13,605,000
Effect of dilutive securities: Stock options	140,000	1,000	66,000
Denominator for diluted net income (loss) per share - weighted average shares	13,370,000	13,603,000	13,581,000	13,605,000
Options
Net Income (Loss) Per Share
Options not included in computation because they were anti-dilutive	538,000		1,005,000
Weighted average exercise of price of options outstanding that were anti-dilutive	$ 4.20		$ 3.48