Unfortunately, AMBT still has two very big negatives...
The first is it's horrible PR department. No one knows who they are. If I were them, I'd make a public tv commercial that, on the front, promotes energy conservation, but whose main purpose is to simply get their name out there.
The second is their huge float. They did a R/S which removed a large portion of their float, but that didn't really change the allocation of shares between investors. Until they do a buyback of some sort, it will be hard to see true stock growth here no matter how much the company grows.