a few insiders have sold a fraction of their holdings, this it true. The biggest seller (Mohr) still has a very large exposure to the company and he did not even sell all of the exercisable options he holds, so it's not like he's lost confidence in the company. The CEO Lonnie Smith has 414,000 shares which at today's closing price is roughly $120M, He's also got about 210,000 options many of which are vested so I think it's safe to say that he has sufficient skin in the game still.
Here is a link to a post were I did an extensive analysis of recent insider sales. Folks can decide for themselves