Finally, a tool which is useful to accountants verifying an SEC XBRL financial filing! While it isn't perfect (Version 1.0), XBRL Cloud's Evidence Package is a big, big step toward giving accountants the tools they need to effectively create and verify that they have created an appropriate SEC XBRL financial filing.
You send the URL of any XBRL instance to the Evidence Package and it returns a battery of HTML files. Here is that battery of reports for the Reference Implementation of an SEC XBRL Financial Report which I have been maintaining for several years now. (This is where you can grab the XBRL files for that reference implementation.)
I was able to convince XBRL Cloud to use the report level semantic model I gleaned from SEC XBRL financial filings and summarized in the Financial Report Semantics and Dynamics Theory. As you look at the Evidence Package, notice how you see virtually no XBRL technical syntax. The information is very readable and understandable to accountants. There are a few things you need to understand like the terms of the Financial Report Semantics and Dynamics Theory like "characteristic", "fact", and "component" and some US GAAP Taxonomy/SEC filing terms such as "Network", "Table", "Axis", "Member" and so forth, but you need to understand no such XBRL technical syntax.
If you want to understand the report level logical model articulated by the Financial Report Semantics and Dynamics Theory and determine for yourself, looking through this Evidence Package is the way to do it. And like I said, every one of the 8000 or so 10-K and 10-Q SEC XBRL financial reports fits into this model. Report level semantic errors in filings do exist and the illogical nature of the modeling is clear. For example, what does it mean to have a [Member] within a set of [Line Items]? That modeling error stands out clearly.
The narrative and videos of ten key areas of the Evidence Package helps you understand how to use the Evidence Package and helps you see how helpful it is.
(Video viewing tips: The videos seem to appear best if viewed in a Safari browser. The best size is the medium size offered by YouTube. Sorry about the quality, this is the best my tools allow.)
Like I said, the Evidence Package is not necessarily perfect. But for a version 1.0, it is extremely helpful and a good sign for accountants trying to tame the XBRL beast. I find that this tool is very helpful in helping me understand if the digital financial reports I create are created as I desire them to be created. I was able to detect issues in my reference implementation which had gone undetected prior to using this tool.
If you want to understand the underlying model or other details, please read Digital Financial Reporting, a resource I put together to explain the report level model being used in detail.