Share-based Payment Arrangements
The Company elected to take the optional exemption under IFRS 1 for the share-based payment transactions granted and vested before January 1, 2012, the date of transition to IFRSs. There were no stock options granted prior to but unvested at the date of transition.
The compensation costs of employee stock options that were granted after January 1, 2012 are measured at the fair value of the stock options at the grant date. The fair value of the stock option granted determined at the grant date of the stock options is expensed on a straight-line basis over the vesting period, based on the Company’s estimate of the number of stock options that will eventually vest, with a corresponding increase in capital surplus—employee stock option. The estimate is revised if subsequent information indicates that the number of stock options expected to vest differs from original estimates.