I don't think that you can get any remedies for this. First, it has nothing to do with copyright because only the expression can be copyrighted. Second, I don't think that your idea can be protected under the patent law because your idea might not fall within the subject matter of the patent protection. Third, I don't think it's a trade secret since it has nothing to do with a business and you failed to take any measures to protect it as a trade secret.
So the only way is to explore whether he has verbatim copied your work. If he is not, forget it. The Copyright law does not protect idea.
So the only way is to explore whether he has verbatim copied your work. If he is not, forget it. The Copyright law does not protect idea.
