Can i run a report that shows me accounts for which there are no contacts?

We've been doing a massive clean up of the contacts we have in SugarCRM.  As part of this exercise, where contacts have not engaged with us for x months based on data from our marketing automation system we've been deleting contact records.  I'd now like to get a list of the accounts we have in our SugarCRM system that don't have one or more contacts.