For Idaho, you’re looking at roughly somewhere between 18 and 20 for Cruz and 12 and 14 for Trump, assuming that Rubio doesn’t creep over 20%.
Right now, it’s 19-13 Cruz (and very close to 20-12 with rounding) with Rubio shut out.
Actually, if things stay the way they are right now, it should be 32-0 for Cruz:
"If one candidate wins more than 50% of the National Convention Delegates, that candidate receives all the National Convention Delegates. [Idaho Republican Party State Rules. Idaho Rules for Selection of Delegates to the National Convention and State Convention. Article VI. Section 3.(a)]"
Unless Rubio breaks 20%, looks like Trump will be shut out in Idaho...