American Superconductor Corporation (NASDAQ:AMSC) shares are trading higher Thursday after the company posted strong fourth-quarter financial results. Here's a look at the key figures from the report.  The Details: American Superconductor reported quarterly earnings of 5 cents per share which beat the analyst consensus estimate of losses of 2 cents per share.  Quarterly sales came in at $42.03 million which beat the analyst consensus estimate of $37.13 million by 13.19% and represents a 32.4% increase from the same period last year. The company said the increase was a ...