Installing Arelle 32 bit on Windows 7

In web sites you may not find old 32 version. But if are running 32 bit windows version then you can download and install it from past versions of the website :)
Download it from here
https://web.archive.org/web/20140731125505/http://arelle.org/wordpress/wp-content/uploads/downloads/2013/08/arelle-win-x86-2013-08-15.exe

After installing you can update at menu:
Help -> Check for Updates

Start at:
File-> Open Web -> SEC RSS

This will fetch latest SEC filings.
For openning an xbrl form:
File->Open Web -> SEC RSS
which will load recent RSS feed for filings
Right clicking on any one of filings and selecting 'Filing->Open Instance Document' will open load and display every part of the filing

Related:
http://mohiplanet.blogspot.com/2016/02/getting-started-with-open-source-xbrl.html