Gauge chart has stange behavior in the calculation of its height when inside a small container

Expected: The gauge chart fits (both horizontally and vertically) the parent's container. No matter the container's size.

Actual behavior: when the container is below a certain width, the chart's height is not calculated proportionally to the width. As result, a blank space is left in the top.

JSFiddle: In the following example the container gets a smaller width in each 500ms, until it reaches 100px wide. The background of the container is gray to make it easier to see the behavior I'm talking about. Link: http://jsfiddle.net/a9hggfcb/2/.

Thanks in advance for any solution for this problem.