BROOMFIELD – For Noodles & Co. Inc., success is being served up in ever-bigger helpings. Hungry investors of Noodles' stock sent the fast-casual restaurant chain's share price over the $40 mark just one trading day after it made its debut at $18 on June 28. The Broomfield-based company (Nasdaq: NDLS) raised $96.4 million in the initial public offering, selling 5.4 million shares for $18 each, according to documents filed with the U.S. Securities and Exchange Commission. Underwriters may buy an additional 803,571 shares in overallotments in the next 30 days. Shares rose to $40.67 in trading on July 1 before dropping slightly…