Hey,
1. If your product/software requires above 50 hours of programming then you don't need to worry about anyone 'stealing' your idea. This rarely happens.
2. Ideas are a dime a dozen. The difficult part is the execution (and marketing).
3. If your product/service can be created in a number of hours, you might want to reconsider as this means that the entry barrier/uniqueness is very low and this will be a problem for investors.
The above is a generalization because I don't know exactly which product you have so I can't be 100% sure.

Good luck