Didn't mean to create a mountain out of a molehill. And your right about the possibility of a customer buying shares but they would have limited insight into sales unless they were talking to other surgeons/hospitals. But then you'd expect way more buying and a lot less selling. I think there has been a growing short interest here ahead of possible reporting that isn't going to thrill the market.
I could be wrong but usually the price moves indicative to news and this can't seem to get any traction over the last quarter.