There is definitely some pump/dump, but that isn't the only thing going on. The provisional applications for patents is in place to allow the company time to prepare for the non-provisional applications coming soon (provisional applications are good for 1 year IIRC). On the company's website they have their pipeline schedule posted with trials set to begin in 2018 and beyond.
Inmed is the only company out there with a provisional application in place (that I know of) for biosynthesis of cannabinoids. I believe other companies like Isodiol are doing herbal extraction or chemical synthesis, which are costly compared to biosynthesis. This, coupled with the recreational legalization in Canada looming, is most likely driving Inmed's current gains--despite recreational cannabis use having nothing to do with what Inmed is doing.