No, it wouldn't mean they are bankrupt. I worked for a company and their stock went down to 5.00 a share. However, there were 200 Million in cash in reserves plus another 100 Million in investments.
They also had 10 profitable quarters in a row. However, their growth was only at 8% where the market was 20-30% a year. Therefore, the stock really didn't go up that much.
My friend bought Apple back in 1994 at 12.00 a share. He is a millionaire now off the stock.