You can see that this stock has now attracted corrupt Wall St manipulators. Each day they create a sharp short drop and stop losses are triggered. They get the shares and then let the price rise back up.
Placing stop loss orders in the market is dangerous because they can see those orders. Try to keep them in your head and just watch the stock.
It trades like this because of its small-ish market opportunity. I believe it is around $275 million that they are pursuing currently. NexGen will target many more labs and, with the additional tests, be a $1.5 billion opportunity at that point. I'm sure trading volumes will pick up then.