finding patrons with On Account funds

Hi all.

I'm trying to find a list of people who have funds on a specific On Account payment method. I feel good about this tiny bit of code, but I need to exclude those patrons with $0.00 balance. Anything I try with pmt_amt either < or > $0.00 removes specific transactions, not those with $0.00 on account. 

(As a side note - I am trying to use this in either a list or an extraction, if that matters at all...)

Thanks in advance,

Lesley