My stock idea for today is one of my favorite growth stories … but the stock itself hasn’t done much in months. So why write about it here? Because it’s showing signs of wanting to get going … and once it does, I believe it’s going to embark on a major run. The company is American Superconductor (AMSC), a firm that tried for years to make a name for itself in high-performance superconducting wires. And, in fact, that business should do well over time, as the U.S. and other countries build out so-called smart grids. However, the big money...