Since you asked and FWIW....I lost $70K cash (180K shares) when I sold last year. I licked my wounds, invested in REITs (GGWPQ and SFI) and made back 4 times that amount. So, ealier this year I reinvested (smaller position) back into PTSC @ 13 cents simply because I believe in the patents. Not sure if it was a wise move but time will tell.
Good luck everyone.