Jquery plugin Stickymojo issue

Sorry guys i am not sure where to post this question. So i am writing it here.

I have used Stickymojo plugin (https://mojotech.github.io/stickymojo/) on one of the client site here on this page (www.interconstra.com/test/). On this page When i scroll to the bottom sidebar contents are overflowing into footer. I dont know how to fix this. Please help me in this issue. Thanks in advance.