After looking over the documentation for arelle on their website, I found the answer. To retrieve the data you need, you can use arelleCmdLine to export a csv specifying relevant data with --factLi...

I downloaded the xbrldb_SEC_pg_2014-11-02.pg.gzip postgres pg_dump file from arelle.org. I then ran the schema ddl file in pgAdminIII and it recreated all of the databases, functions, etc. When I ...