Their technology is evidently the aerodynamic separation method originally used by South Africa to produce the nuclear weapons it had prior to the abandonment of apartheid in the early 1990's. My understanding is that it was not a particularly practical way of separating heavy isotopes (e.g Uranium, Ytterbium etc) but I guess it may of improved over time and may be more effective to light isotopes which appears to be the companies target market. Like centrifuge separation is based upon density - so can separate 28Si from 29Si & 30Si but is NOT selective (i.e cannot remove an isotope such a 236U from 238U and 235U). The technology is described below:
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