To sell units beyond their first adopters they need to address key issues with electric cars (and I am all for EVs). What they need to do is license their technology to Ford and GM to get mass market appeal and to help build/develop EVs in the $20k range. As the article states, "It projects selling 20,000 cars next year, which is a relatively high number among luxury brands."
This is really what is going to happen: the will be acquired by a larger brand.