Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity and Capital Stock - Options by price range (Details)

v3.3.0.814
Shareholders' Equity and Capital Stock - Options by price range (Details) - $ / shares
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.95 $ 1.12
Number of options outstanding 8,676,918 8,468,614
Weighted- average remaining contractual life (years), Outstanding 2 years 3 months 18 days  
Number of options exercisable 7,321,929  
Weighted- average remaining contractual life (years), Exercisable 1 year 10 months 24 days  
Stock Option Exercise Price Range One [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 2.14  
Number of options outstanding 1,172,648  
Weighted- average remaining contractual life (years), Outstanding 3 months 18 days  
Number of options exercisable 1,172,648  
Weighted- average remaining contractual life (years), Exercisable 3 months 18 days  
Expiry Jan. 28, 2016  
Stock Option Exercise Price Range Two [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 1.17  
Number of options outstanding 545,000  
Weighted- average remaining contractual life (years), Outstanding 9 months 18 days  
Number of options exercisable 545,000  
Weighted- average remaining contractual life (years), Exercisable 9 months 18 days  
Expiry Jul. 07, 2016  
Stock Option Exercise Price Range Three [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.87  
Number of options outstanding 615,238  
Weighted- average remaining contractual life (years), Outstanding 10 months 24 days  
Number of options exercisable 615,238  
Weighted- average remaining contractual life (years), Exercisable 10 months 24 days  
Expiry Sep. 09, 2016  
Stock Option Exercise Price Range Four [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.86  
Number of options outstanding 200,000  
Weighted- average remaining contractual life (years), Outstanding 1 year 1 month 6 days  
Number of options exercisable 200,000  
Weighted- average remaining contractual life (years), Exercisable 1 year 1 month 6 days  
Expiry Oct. 24, 2016  
Stock Option Exercise Price Range Five [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.68  
Number of options outstanding 897,769  
Weighted- average remaining contractual life (years), Outstanding 1 year 3 months 18 days  
Number of options exercisable 897,769  
Weighted- average remaining contractual life (years), Exercisable 1 year 3 months 18 days  
Expiry Jan. 12, 2017  
Stock Option Exercise Price Range Six [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 1.04  
Number of options outstanding 200,000  
Weighted- average remaining contractual life (years), Outstanding 1 year 3 months 18 days  
Number of options exercisable 200,000  
Weighted- average remaining contractual life (years), Exercisable 1 year 3 months 18 days  
Expiry Feb. 01, 2017  
Stock Option Exercise Price Range Seven [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.88  
Number of options outstanding 100,000  
Weighted- average remaining contractual life (years), Outstanding 1 year 4 months 24 days  
Number of options exercisable 100,000  
Weighted- average remaining contractual life (years), Exercisable 1 year 4 months 24 days  
Expiry Mar. 01, 2017  
Stock Option Exercise Price Range Eight [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.57  
Number of options outstanding 1,243,265  
Weighted- average remaining contractual life (years), Outstanding 2 years 2 months 12 days  
Number of options exercisable 1,243,265  
Weighted- average remaining contractual life (years), Exercisable 2 years 2 months 12 days  
Expiry Dec. 07, 2017  
Stock Option Exercise Price Range Nine [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.57  
Number of options outstanding 559,358  
Weighted- average remaining contractual life (years), Outstanding 2 years 7 months 6 days  
Number of options exercisable 559,358  
Weighted- average remaining contractual life (years), Exercisable 2 years 7 months 6 days  
Expiry Apr. 25, 2018  
Stock Option Exercise Price Range Ten [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.92  
Number of options outstanding 100,000  
Weighted- average remaining contractual life (years), Outstanding 2 years 9 months 18 days  
Number of options exercisable 100,000  
Weighted- average remaining contractual life (years), Exercisable 2 years 9 months 18 days  
Expiry Aug. 01, 2018  
Stock Option Exercise Price Range Eleven [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.89  
Number of options outstanding 914,694  
Weighted- average remaining contractual life (years), Outstanding 3 years 2 months 12 days  
Number of options exercisable 914,694  
Weighted- average remaining contractual life (years), Exercisable 3 years 2 months 12 days  
Expiry Dec. 27, 2018  
Stock Option Exercise Price Range Twelve [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 1.25  
Number of options outstanding 100,000  
Weighted- average remaining contractual life (years), Outstanding 3 years 6 months  
Number of options exercisable 100,000  
Weighted- average remaining contractual life (years), Exercisable 3 years 6 months  
Expiry Mar. 31, 2019  
Stock Option Exercise Price Range Thirteen [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.76  
Number of options outstanding 986,592  
Weighted- average remaining contractual life (years), Outstanding 4 years 2 months 12 days  
Number of options exercisable 569,722  
Weighted- average remaining contractual life (years), Exercisable 4 years 2 months 12 days  
Expiry Dec. 12, 2019  
Stock Option Exercise Price Range Fourteen [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.85  
Number of options outstanding 200,000  
Weighted- average remaining contractual life (years), Outstanding 4 years 8 months 12 days  
Number of options exercisable 20,000  
Weighted- average remaining contractual life (years), Exercisable 4 years 8 months 12 days  
Expiry May 29, 2020  
Stock Option Exercise Price Range Fifteen [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price $ 0.64  
Number of options outstanding 842,354  
Weighted- average remaining contractual life (years), Outstanding 4 years 10 months 24 days  
Number of options exercisable 84,235  
Weighted- average remaining contractual life (years), Exercisable 4 years 10 months 24 days  
Expiry Aug. 17, 2020