My question involves unemployment benefits for the state of: Illinois

I know the majority of this forum is for employee rights but I am asking about employer rights.

I am part of a Nursing Agency. For those who are unfamiliar with Nursing Agencies, we basically find work for nurses (RNs, LPNs, and CNAs) with various nursing homes and hospitals we work with. The nature of this business is strictly temporary and instable. We cannot guarantee any amount of hours/week of work. Several of our employees have filed for unemployment on the grounds of insufficient work. We have filed on a couple of occasions proof that they were indeed ineligible. Because of the nature of the business it is impossible for us to guarantee work. I am wondering if there is any way so that our corporation becomes ineligible for unemployment specifically for insufficient work? Having to file proof that each and every employee who file for unemployment because of insufficient work is getting very costly. Sometimes we have had to file twice because IDES continues to give unemployment benefits.