I had the same logic too for a while. I've been in and out of ACAD since 2.00, just recently sold all. Best thing as I had a lot of higher priced shares, I've been selling and reacquiring at a lower price point. Right now I'm not even sure if its better to sit on it or sell and reinvest in something shorter term then come back to it. I do believe this stock will be double, but not soon, end of 14'/sometime in 15'.
I think they are scheduled to meet with the FDA this spring. After that meeting, I expect they will announce an FDA-approved plan for rolling submission and accelerated review of the pima NDA, with approval possible in early 2015. If so, you do NOT want to be out of the stock!