Looks like $4.00 is a floor for PPS for the foreseeable future:
The selling stockholders may only sell their shares of our common stock pursuant to this prospectus at a fixed price of $4.00 per share until such time as our common stock is quoted on the OTCQB, or another public trading market for our common stock otherwise develops. At and after such time, the selling stockholders may sell all or a portion of their shares through public or private transactions at prevailing market prices or at privately negotiated prices.