Seems like this fits in well with Hyundai's autonomous car project Motional, which is also based in Boston.
https://www.theverge.com/2020/8/11/21362322/hyundai-aptiv-mo...
https://www.theverge.com/2020/8/11/21362322/hyundai-aptiv-mo...
My guess is they got acquired for some research they have done in dynamic trajectory planning, which can be useful in self driving cars.