If PXYN announces that they have reached a new agreement with TPS on more favorable terms the stock will regain all it has lost, and probably more.
Until then, the safe assumption is that they've lost the source of most of their revenue and have established a relationship with a new entity that - if a substitute for TPS in terms of being PXYN's main sales driver - will take a far bigger chunk of PXYN's sales than did TPS.