NJ/PA Reciprocal Agreement

I live in NJ and work in PA. I recieved Federal, NJ, and local income tax return forms from my employer. I contacted berkheimer (PA local income tax collector) and they informed me that I would not need to file a separate local income tax return since my employer withheld local income tax and I don't live in PA.  My employer did not provide any PA tax information (no state wages and no income taxes reported for PA), besides the local income tax information. This is my only source of income in PA. I'm assuming my PA taxes were not withheld by my employer then. I already filed NJ and Federal return. Would I need to file a PA state tax return?