Actually there not, I think the correct term would be considered Lower Volume, As of the "LVMVMA" Low Volume Motor Vehicle Manufacturers Act. However, There mght be differences depending on each country and division, And there are different parts depending on the model of car and the company as a whole< Not too mention certain countrys restrictions and regulations.
A "low volume manufacturer" is a motor vehicle manufacturer whose annual Worldwide production (including by a parent or subsidiary of the manufacturer) is not more than 5,000 motor vehicles each year.
So if Ferrari sold 7700 cars, And they made 1000 less, Ferrari is Far far away from being a low volume company. And if its 1000 cars or less a year, Its another division, Then if its less then 100 year another, Then custom coach building etc.