I do not know what you mean by "document". I studied typography and designed digital type, for a while, about 20 years ago. So I know a bit about the design side of things. And the design side is what my post is limited to. I am sorry if this was a tad ambiguous.

I did not talk about the history. I talked about a typographical design trend that pertains to currency symbols. Also not that better typefaces sometimes have both versions on the $ sign. One and two strokes. The default is admittedly still the single bar one though.

Expert discussion re. the one bar/two bar $ sign, that could be an interesting read: http://www.typophile.com/node/17976