if the Kovner buys alone is your sole reason for buying or pumping this without knowing much else... then please sell the moment you are profitable. there is no bio more risky than a cancer bio. hell man... go buy OPK. their CEO buys EVERY day if that is what motivates you. I am saying this as one that watches insider buys and sells religiously.
PLEASE feel free to report back to us once you've learned more about this company. I'm long and there is $ to be made even from this current pps. the Kovner/Caxton buys are totally relevant but one lined useless posts like yours serve as much good as Quo's "sell @ $5.60" posts. when is the last time an insider SOLD? what is the current short interest? how about some facts and points of interest that supports the company in relation to institutional ownership? there's tons of science to talk about... right?
I mean not to offend you but surely you have more to offer than pointing out that the CEO bought some shares don't you? look up Caxton and see who runs it... then get back to me.