Chrome's developer console has your answer.
[blocked] The page at https://www.hyperiontx.com/ ran insecure content from http://fast.fonts.com/jsapi/b3fca0c6-ff69-4fdb-b66b-8c298c1cd396.js.
Chrome is blocking the script that inserts the relevant font CSS because it's loaded insecurely.
Try changing the reference to:
<script type="text/javascript" src="//fast.fonts.com/jsapi/b3fca0c6-ff69-4fdb-b66b-8c298c1cd396.js"></script>