I mentioned the data points model in a previous blog post. Someone posted a video to XBRL-Public which explains the data points model approach in detail. You can find this video here.
While this video is long (1 hour and 26 minutes), is detailed, and discusses data modeling and the data points model from the perspective of the FINREP taxonomy; this video will help one grasp the important general issues related to expressing information in XBRL.
You can distill the message of this video into one concise statement:
Build consistent and explicit data models.
What I have created and documented in my Modeling Business Information Using XBRL document follows those two key principles. So I could not agree more with those who support the data points model.