Can I add CSS instead of css file to TinyMCE editor + rails?

Actually In my my application I have dynamic css for each document which is opening in the tinyMCE editor for editing but its not loading my styles or is there any way to pass a css to TinyMCE instead of content_css, because content_css accept only css files and I don't have any css file, my css is stored in the database for each document, so I want to apply css which is stored in the database to the content of TinyMCE editor