NSYS - I bought some after the company announced that the CEO and CFO had established 10b5-1 trading plans to buy the stock. It didn't move soon enough for me, so I sold.
I guess I hit the trifecta with selling TCCO, JAN, and NSYS too soon!
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.