Risk reward doesn't support shorting. The company has a drug that will be approved by the FDA. The company has cash to last for two years. The drug certainly has potential to do hundreds of millions in sales.
Worse case for longs is this stock is overvalued by 4 or 5 dollars and that's only due to it getting ahead of itself. Long term, the rev from the drug will support much higher multiples. So the best a short can hope for, is maybe a 40% retracement. .
Worse case for being short is the company get a billion dollar offer and overnight you find yourself 10 to 15 dollars underwater before you can get out.
Whats worse for shorts, is the likelyhood of the 2nd event is greater than the retracement. So given that, why would you want to be short at these levels? If the stock runs to 30 or more, the risk reward ratio changes. But not at around 10.