Idaho Code § 49-2412
In addition to the criminal and civil penalties provided, any person who shall be injured in his business or property by any other person by reason of anything forbidden or declared to be unlawful by the provisions of sections 49-2401 through 49-2406, Idaho Code, may sue therefor in any court having jurisdiction in the county where the defendant resides or is found, or any agent resides or is found, or where service may be obtained, without respect to the amount in controversy, and to recover twice the damages sustained, and the costs of the suit. Whenever it shall appear to the court before which proceedings may be pending, that the ends of justice require that other parties shall be brought before the court, the court may cause them to be made parties defendant and summoned, whether they reside in the county where the action is pending, or not.
Idaho Code § 49-2412