The Big Picture, page-17

We discussed this before. In case you have forgotten, the options had exercise prices ranging from $4 to $10. I.e. they will either lapse worthless meaning they are not going to be an expense of any sort, or they will be exercised to convert to ordinary shares but in doing so the option holder will pay between $4 and $10 per share. That is the equivalent of the company doing a capital raising at a good premium to the current price to raise cash.
That net decrease in cash partly reflects payments for stock to provide to resellers ahead of Christmas and the fact that those resellers are slow to pay MGM.