Inline eXtensible Business Reporting Language (iXBRL) is a format for used for financial documuements. It is normally a html(xhtml) file that can be opened by a webrowser.
The text and figures can be “tagged” that is readable by machines, but normally hidden when viewed with a browser. A tool such as Graffiti can be used to show the ixbrl data.
Learn more about iXBRL
Other Tools and Services
Corefilling profide a number of ixbrl related tools and services.
Workiva’s ixbrl-viewer is very good if you wish to pre-process the documents.