Outstanding shares are those that they have already issued,while Authorized shares are the total amount that they are currently allowed to issue, so in this case, if they so desire, they are able to issue an additional 18.8 million shares (to raise additional capital), but issuing additional shares causes Dilution ( when earnings begin, the level of EPS is less than if the additional shares had not been issued)
Hope that makes sense, I'm in kind of a hurry.
Thanks for your helpful insights and information.