Takes money to make money. As long as they are investing it wisely with the expansion of staff, R&D, equipment, etc., this is all a good thing. As I have said before, they have been conservative with their money so far and I cant see them taking on additional expenses without good things on the horizon.
Also, those Q4 numbers are preliminary, this is what they have locked in right now. This still leaves room for surprises in the final numbers.