Here is CEO of Helion Energy, Dr. David Kirtley, explaining his company's approach:

The guy's an established scientist with a degree in Aerospace, Aeronautical and Astronautical Engineering, master's degree in Nuclear Engineering, and a PhD in Aerospace Engineering, who worked in Air Force Research Laboratory for over 7 years. Interestingly, his approach stems from his work in propulsion technology during his years in AFRL as Helion Energy basically propels two plasma beams at each other to create a 100 million degrees in the core.

It's hard to put them at the same category as Theranos and Enron especially considered how much they have accomplished with so little funding that they have received.