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Stock-Based Compensation and Shareholders' Equity (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 9 Months Ended 177 Months Ended 9 Months Ended 177 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
1998 Plan [Member]
Sep. 30, 2012
1998 Plan [Member]
Sep. 30, 2012
2005 Plan [Member]
Sep. 30, 2012
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Employee Benefits and Share-based Compensation $ 16 $ 13 $ 57 $ 42          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 94   $ 94            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     2 years 4 months            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           220,500 220,500 200,000 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award               The terms of the 2005 Plan are identical to the 1998 Plan, except options expire five years after the grant date.  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     20,000       225,058   123,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period             28,444   41,175
Stock Issued During Period, Shares, Stock Options Exercised             143,114    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 135,525   135,525   156,275 53,500 53,500 82,025 82,025
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date           Mar. 10, 2008   Mar. 15, 2015  
Fair value of options granted     $ 3.81 $ 3.31