"The courts exercise their power to issue injunctions judiciously, and only when necessity exists. An injunction is usually issued only in cases where irreparable injury to the rights of an individual would result otherwise. It must be readily apparent to the court that some act has been performed, or is threatened, that will produce irreparable injury to the party seeking the injunction. An injury is considered irreparable when it cannot be adequately compensated by an award of damages. The pecuniary damage that would be incurred from the threatened action need not be great, however. If a loss can be calculated in terms of money, there is no irreparable injury. The consequent refusal by a court to grant an injunction is, therefore, proper. Loss of profits alone is insufficient to establish irreparable injury. The potential destruction of property is sufficient."