When it comes to idea's, and this goes for every area of life. Unless it is patent or you have some legal rights to the idea or property. I would not recommend sharing it with anyone. Unless it's an individual you were able to build a trust and mutual respect with. If you will be speaking with someone who is not in the same line of work. But can offer you valuable insight that be great. This is something to consider other wise. You can hint at the idea. #1. Break down the vision or idea into certain goals. 2. You can use your goals as a point of focus to speak about instead of the idea in its totality. 3. As you gather information for each goal or point of focus. You can then put the pieces together.
Other wise you can continue doing research, look for someone you trust or know who has done something similar or has related experience in the field. If your information or product is not patent I don't see any guarantees that the idea or product will not be up for grabs. So disclose the information wisely. From your friend and consultant Celso Nolberto. At your service.