If you think about the majority of companies that are, again, small enterprises, you're looking at companies that have zero to $5 million in sales, if you're thinking about it in those terms. You can go upwards of ten, but at the $10 million mark in sales, you should be exceeding 20 to 25 employees. If you're going to redefine, I would consider looking at the revenue line item as well as the number of employees as part of your criteria.
On October 25th, 2011. See this statement in context.