Ubuntu / Unity attach script to Launcher

I recently downloaded IntelliJ IDEA and start the app by running . idea.sh. The app appears in the launcher while I'm running it, but for some reason when I right click on it I don't get a 'Lock to Launcher' option like I do with other apps. How do I attach it to the launcher? Is it because I'm running a script and not an executable directly that disables that option?