Tesla Motors (TSLA) is in the Danger Zone this week. Up over 350% in 2013, the electric automaker has dominated headlines and made a lot of investors very happy (and a lot of shorts very angry). At ~$150/share, it’s no secret that the stock is expensive. What most investors don’t realize is that there are some significant details buried in the footnotes of TSLA’s SEC filings that materially affect the outlook for shareholders in the company.