Actually the majority of E3110 or any 45nm CPU for that matter is not going to report accurate idle temperatures.
The sensors were designed to report high temperatures such as the throttling temperature to avoid damage, and consistently gets less acurate as the temperature lowers.
On top of that you have the sensor "sticking" which many of these CPUs will have. One of my cores is stuck at 33C, and only when the temp goes to about 38C does it kick in and start rising. The other idles at 29C, but may also be stuck I'm not sure.
So you see knowing your actual idle temperature is not really possible using software anyways. What counts are your load temperatures are where they're supposed to be which means your idle ones would be as well, and seeing as 45nm CPUs hardly dissipate much heat at all, you have nothing to worry about.
Last thing, real tjunction max is more likely 95C so subtract 10C from your CoreTemp readings, or use RealTemp.