I think those selling are the ones that bought in the January spike from $1.80 up to $3.xx and the volume spike from March of 2012 Once they are out then we'll start to trend higher.
I was in this one from the Muddy Waters report on the day they actually bashed it down from around the $8 range.
It's a very good company and they are making money and the market will start to valuate it accordingly. For today, it looks like profit taking and some daring shorts. I don't think it lasts long, though. I'm back in after almost 4 years here at $1.80 If it dips below I'll buy more. This is a bargain for those who can wait a few days.
Adding: The SEC's closing of the investigation lends a huge amount of credibility to this company. I've always believed in it but I didn't want to tie my money up in a bad trade. Now, it turned out to be legitimate so I feel that this is the basement from now on. Good luck to all.