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Net Income (Loss) Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Weighted average number of shares outstanding:
Common stock	20,026,354	19,840,116	20,008,358	19,806,034
Common stock equivalents - stock options, grants	61,278	64,628	75,372	48,495
Diluted shares outstanding	20,087,632	19,904,744	20,083,730	19,854,529

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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