Just to post a follow up to my earlier comment, we have received payment for the $100 that was due June 30.  Yes, it was a little late; but, aside from this payment they have an excellent payment history with us. 

Others seem to be owed more than us, I hope they get paid as well.  We have never done "a lot" of work for them, but they have been one of the good ones payment-wise.  Let's hope they get back on track.