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Capital Stock (Narratives) (Details) - USD ($)
3 Months Ended 6 Months Ended 186 Months Ended
Apr. 28, 2015
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Apr. 03, 2015
Dec. 31, 2014
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]                
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   750,000    
Stock issued during the year, Shares, Employee Stock Purchase Plans   26,181 31,116     611,369    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized             17,508,929  
Increase In Number Of Shares Authorized For Issuance Under Stock Option And Incentive Plan             2,500,000  
Equity Instruments Other than Options, Grants in Period       254,685        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   1,264,875 2,477,884 5,169,376 2,578,743      
Percentage Of Outstanding Common Stock   20.00%   20.00%   20.00%    
Weighted Average Estimated Black Scholes Value Of Option Grants   $ 2.08 $ 2.2 $ 2.21 $ 2.19      
Preferred Stock - Shares Authorized   5,000,000   5,000,000   5,000,000   5,000,000
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 80,000              
Accelerated Share Based Compensation Expense $ 100,000