ABC Corporation grants share-based compensation in the form of stock options to its employees. Each option allows the employee to purchase one share of ABC’s common stock at a predetermined exercise price. Employees are required to remain with the company for a three-year vesting period before the options can be exercised. ABC Corporation uses the Black-Scholes model to estimate the fair value of these options at the grant date. The company recognized total share-based compensation expense of $1.5 million in its income statement this year.
At the end of the year, ABC Corporation's share price has increased significantly, and a substantial portion of employees has opted to exercise their options. Given this scenario, how will ABC Corporation report the expense related to stock options in its financial statements?