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SELECTED STATEMENT OF OPERATIONS DATA (Details 7)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Selected statement of operation [Line Items]      
Weighted average number of shares issued and outstanding - used in computation of basic EPS 18,869 18,767 18,679
Add - incremental shares from assumed exercise of options 21 79 124
Weighted average number of shares used in computation of diluted EPS 18,890 18,846 18,803