Motion Frame showing values when idle

Is it normal for the motion frame to be showing values even when it is idle? It is just sitting on the desk and the values are:

this depend on how your code running.

You are measuring the gravitational acceleration in the three dimensions.
If the accelerometer is perfectly horizontal you should have X=0, Y=0 and Z=9,81N/s². If you are sure the accelerometer is horizontal then x and y are offset you should substract from following readings.
There is a Guide to gyro and accelerometer on Arduino forum that could be of some interest.