The potential market opportunity is well above the company's $85 million market value. What's the upside? It's hard to quantify, but further clinical testing progress can only help put this stock onto more radars. Risks to Consider: Insiders don't always have great timing, so their purchases can sometimes take place well in advance of any actual share-price movement. Action to Take: Heavy insider buying underscores the fact that these stocks are under-appreciated, or at least not fully understood by most investors. They may be off most investors' radars right now, but forward momentum for each of these business models could make them household names in 2012. Aggressive investors may want to take a small stake in any of these names after further due diligence. Disclosure: Neither D. Sterman nor StreetAuthority, LLC hold positions in any securities mentioned in this article.More from StreetAuthority:
Buffett Just Spent $7 Billion on These "Forever Stocks"
A Little-Known Bill in Washington Could Lead to Big Gains for These Stocks
Warren Buffett Just Bought $10.7 Billion of This Stock