Idaho Code § 42-3205: Bond of petitioners.

At the time of filing the petition or at any time subsequent thereto, and prior to the time of hearing on said petition a bond shall be filed, with security approved by the court, sufficient to pay all expenses connected with the proceedings in case the organization of the district be not effected. If at any time during the proceeding the court shall be satisfied that the bond first executed is insufficient in amount, it may require the execution of an additional bond within a time to be fixed, not less than ten (10) days distant, and upon failure of the petitioner to execute the same, the petition shall be dismissed.