Every employer shall be liable for the penalties described in this title and may also be liable if an injury or occupational disease has been sustained by a worker prior to the time he or she has secured the payment of such compensation to a penalty in a sum not less than fifty percent nor more than one hundred percent of the cost for such injury or occupational disease. Any employer who has failed to secure payment of compensation for his or her workers covered under this title may also be liable to a maximum penalty in a sum of one thousand dollars or in a sum double the amount of premiums incurred prior to securing payment of compensation under this title, whichever is greater, for the benefit of the medical aid fund.