Contempt is very hard to prove and is a technical process that you will want to consider in context of other potential Court proceedings to get what you need. Contempt is an option but so is obtaining and collecting a judgment. The route you choose to pursue will depend on what kind of employment your spouse has, how she/he is paid as well as his/her financial circumstances as a whole. If you choose to pursue contempt, I highly recommend your having a lawyer to at least assist you with understanding the necessary proof if not drafting the appropriate motion and pursuing your available remedies with you.