Geoff they are ground on both sides, it is a hollow sabre grind. It is an easy blade shape to sharpen as it does not have any curves. Do it in two steps, the point and then the rest of the blade. The serrations are flat tips which you can sharpen right along with the rest of the blade. To get inside the grooves you will want a fine rod or maybe the Spyderco Sharpmaker, which I have not tried.
-Cliff