I'll use a Winston-Churchill quote to give you the answer:
"A lie goes halfway around the world before the truth has a chance to get its boots on."
Quite simply, there has been so much FUD spread about Navidea that it will take momentous news to start the SP going in the right direction. What that news will be, I don't know, but it will come eventually, and then we might finally see some positive movement which even the shorts and their games will not be able to stop.
I will still be here when that happens. I would suggest that you, with your constant negativity, are not.
Maybe this is the right price for this stock, now that the drama of approval is over? The run-up would have increased the stock price on anticipation as Apr 30th approached, but that didn't happen as the news broke out earlier. Many investors (pumpers really) who wanted to play the "run up" left after approval, if they were in the green. I suspect other investors are not buying this stock quickly enough in spite of approval because they are not sure if sales from LS market penetration can offset the company's high cash burn rate. So they're waiting and watching. Now it is the revenues or additional products in the pipeline that can appreciably move the stock.