Ordinarily, we would say "This is an advanced idea."
That means that this idea is ahead of the other ideas, in the sense of being newer, or more developed. At the time many people thought the world was flat, the idea that the world is round was an 'advanced idea'.
"This is an advance idea" is incorrect. "Advance" can be used to mean "early," but only in the context of seeing or receiving something before it is supposed to be available, and not in the general sense of something being ahead of its time.
"Earlier idea" has almost the opposite meaning: an idea from some previous time.