No - looked up their website - based on their coverage list, it does not seem they are focused on short-selling, but you don't get the impression that they are a significant influence in the market? I'd be interested to see on what basis they are doubting the long-term value here - sure, the share price may have gotten ahead of itself in the near-term, but 3 years out this is at least a $20 stock, so they must not believe in the market potential.
Their recommendation of market underperform makes no sense. They gave the stock a 12 month price target of only $6.00. It looks like a sham to me. The stock drops to $10.87 in the first hour on 180,000 shares. Then the next 400,000 shares move the price gradually up to the $11.35 range.
I can understand a market underperform rating because the stock has moved up quickly, but a $6.00 price target, given what we know today, is outlandish.