How do I allow user to run a R script without making a website or web application?

I have data a R script that creates a report from the data. I can't expose the data to internet. Also, I cant expose my script to internet / user. But I would like to eliminate myself from the work, and allow couple of users (yeah, only three users that use this script to generate reports, but they do it weekly) to run the script and generate report for them. I would like the community to suggest me how I can achieve this. Any information helps.