This company is about testing and breaking things.. So this logo want to show that process in a simple symbolism.

There are three layer of square. The front one (the most fragile-symbolized in the thinner-in color). was break due to a test. And there still few layers behind it. It getting thicker and stronger. If the process continue, so the last one is the perfect one.

If you see, the square is also transform into more curvy and more into a circle. A full circle will symbolize a perfection. So its heading to perfect.