Idaho Code § 19-3912
The same challenges may be taken by either party to the panel of jurors, or to any individual juror, for cause, as on the trial of an indictment for a misdemeanor; but the challenges must in all cases be tried by the court; the defendant is entitled to four (4) peremptory challenges and the prosecution to four (4).
[(19-3912) 1874, p. 363, secs. 605, 607; R.S., R.C., & C.L., sec. 8290; C.S., sec. 9238; am. 1929, ch. 33, sec. 1, p. 36; I.C.A., sec. 19-4012.]