(i) Loss per share
Loss per share is calculated by dividing net loss attributable to common shares of the Company by the weighted average number of common shares outstanding during the year. The Company uses the treasury stock method for calculating diluted loss per share. Under this method, the dilutive effect on earnings per share is calculated on the use of the proceeds that could be obtained upon exercise of options, warrants and similar instruments. It assumes that the proceeds of such exercise would be used to purchase common shares at the average market price during the period. However, the calculation of diluted loss per share excludes the effects of various conversions and exercise of options and warrants that would be anti-dilutive.