A decision of the commission, in the absence of fraud, shall be final and conclusive as to all matters adjudicated by the commission upon filing the decision in the office of the commission; provided, within twenty (20) days from the date of filing the decision any party may move for reconsideration or rehearing of the decision, or the commission may rehear or reconsider its decision on its own initiative, and in any such events the decision shall be final upon denial of a motion for rehearing or reconsideration or the filing of the decision on rehearing or reconsideration. Final decisions may be appealed to the Supreme Court as provided by section 72-724, Idaho Code.