they typically blow up in proportion with anticipated size of market and the potential revenue (e.g. 60 billion market for the drug and company stands to capture 10%, as an example)
or, they are bought out by larger drug co and the offer equals a certain price per share- example, co was trading at $1 and offer to buy was for $15/share in cash and equivalents.
some of the news here leads to imum generating 30mil or more per year, so if that is indeed true then the market cap should be at least 1x to 2x that amount up to 10x. divide market cap by outstanding shares, will give you an idea of future share price potential.