A non-disclosure agreement (NDA) is basically a document that says whatever information a company is giving someone needs to be kept confidential. We’ve been practicing law for over forty years, and we’ve only had one lawsuit concerning an NDA. They’re not very strong documents. What we advise you do is go out and see if there is any information that you have that can be protected — whether it be with trademarks, patents, or copyrights. A lot of people will also not sign NDAs  since it is often difficult to track them.