That was the "old way". At-the-money options were counted as zero expense. It was absurd, but as
@Fact Checking points out we did it that way forever until tech companies realized what a huge loophole it was and started really exploiting it. In defense of the FASB, employee stock options were rare in the 30s when the rules were put into place and there wsa no standard way to value them. Myron Scholes and Robert Merton won the 1997 Nobel Prize for Economics for the now-famous options pricing equation they developed with Fischer Black (who unfortunately died in 1995 and was thus ineligible). Their work dated from 1973 but took time to be accepted by the accounting profession. And then it took another decade to overcome lobbying from corporate execs who absolutely did not want to count the mega-millions in compensation they granted themselves as an expense on the income statement.
Anyway, near the bottom of your article is says that since 2005 you must use Black-Scholes or a similar method to estimate the fair market value of the options, then count that as an expense over the vesting period. Exactly the same as if you paid suppliers in options, or sold options in the market and used the cash to pay suppliers or employees. As it should be.