That's a good resource for otc screening. Too bad you can't get everything in one place.
It would have been a good place to find MCPH. It was trading at $5.45 with a tangible book value of around $37 when the company entered into an agreement to be acquired for between $31.00 and $32.50 per share. There's gold in the otc market, but you need to have a whole lot of patience.
I have seen lots of $1 stocks with strong earnings and solid balance sheets triple, quadruple and more, but I have yet to see one go below zero.