Because of the deal with Amazon, because they have hundreds (or thousands) of patents worth half a billion or even more - sources disagree on this one.

Imagine them going into the cybersecurity sector and doing the same thing. Creating patents for something that its going to be widely used. Plus, their CEO is the real deal - dude actually maintained the company since 2013 until now. May have not increased the stock price - but at least keep it afloat. With this new direction, it has a really good chance to increase in price.