Earnings per share (Notes)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings per share [Text Block]

Earnings per share

Because we incurred a net loss for the three months ended March 31, 2013, basic and diluted earnings per share are equivalent for the period. For the three months ended March 31, 2013, there were 1,019,424 stock options excluded from the calculation of diluted earnings per share because inclusion would have been anti-dilutive.