The fair use doctrine is an exception law makers created to protect people from copyright infringement suits, but its applicability is limited. The doctrine allows individuals to use copyrighted work and reproduce it "for purposes such as criticism, comment, news reporting, teaching, (including multiple copies for classroom use), scholarship, or research." 

Everyone has access to your ideas. Make sure you protect your right to them by sitting with an attorney, identifying your intellectual property, and seeking the right registration for your business.