After a big move up yesterday (maybe in part due to a short squeeze), we could see some profit-taking today. It's a volatile stock. I wouldn't read much into a little move down today, especially if volume is about average or less.
I've been following this stock for years and believe the stock can go back to the highs in a few years, but one thing I do know with this stock is there are a lot of shorts and anytime it makes a nice move the bears have to scramble and throw someone out there to downgrade it. The problem is, it's not working anymore - it might stop the momentum for a few days as it always does, but just wait til earnings day.