I wouldn't worry too much about this. The shorts could have many strategies. As kookiekook points out, could be a bet on poor earnings. The shorts could also be long the calls as a hedge. Just as some who are long the stock also have put options as a hedge.
It could also simply be momentum trading. A lot of traders will go long until they see a reversal, then sell and go short.
We look good here going into approval. The bigger the short position, the bigger the squeeze.