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Capital Stock (Narratives) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 9 Months Ended 162 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Jun. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase In Number Of Shares Authorized For Issuance Under Stock Option And Incentive Plan 250,000     250,000    
Stock issued during the year, Shares, Employee Stock Purchase Plans 0 0   27,305 25,597 497,708
Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 2.64    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 6,060,144 8,644,009   7,227,774 5,812,794  
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date       85.00%    
Employee Stock Purchase Plan Shares Authorized 750,000     750,000    
Equity Instruments Other than Options, Grants in Period       124,277    
Options, Granted in Period, Shares 0   0 826,388    
Deferred Compensation Arrangement with Individual, Maximum Contractual Term       10 years    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount $ 0   $ 0 $ 0    
Minimum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       1 year    
Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       4 years