Don't know where the stock is heading, but I can tell you that it works great. The other drug for c.diff (Vancomycin) didn't work for me any more but Dificid did the job. Soon, Canada will approve it for drug coverage by the government for seniors and even now, company health insurance plans cover it. Very few doctors are aware of it right now. Once it becomes know, it'll be widely used in hospitals where c.diff. is becoming a serious and expensive infection.
Many of those shares appear to be stock awards that can no longer be priced at $0. So your point about insiders not selling probably needs a little more research as they could be corralled by price and also time.[i.e.- must be held 1-2 yrs.??]