Idaho Code § 19-4107
If he denies the truth of the accusation, the denial may be oral and without oath, and must be entered upon the minutes.
[(19-4107) Cr. Prac. 1864, sec. 73, p. 222; R.S., R.C., & C.L., sec. 7451; C.S., sec. 8676; I.C.A., sec. 19-4207.]