Markets of $2-$5M are pretty small. This suggests to me that they will need to acquire a lot of licenses, which means profit margins lower than they would be with a few higher-revenue drugs because of the additional costs of selling (and housing) lots of drugs.
This is more than a 10 bagger from where I started buying a couple of years ago. I remember buying ten thousand and fifteen thousand shares at a time at .26. Wish I still had the 280K shares I had a year ago. Oh well.