The short answer is you can seek all damages that would naturally and foreseeably flow from the collision. I think you may have more than the maximum small-claims-court damages threshold. So, you may want to file in county or district court. In any event, it will be easier to let a lawyer pursue this for you if the insurance company is not responding to your satisfaction. You have to file within 2 years of the negligence so you will want to retain an attorney soon.
Good luck to you.