Scottsdale-based Kona Grill, Inc. (KONA) recently announced that its Chief Executive Officer (CEO) and President Marc A. Buehler has resigned to pursue other opportunities. Buehler joined the American grill and sushi bar company as the CEO and President in November 2009 and took all possible measures to improve the company’s top line and narrow losses. [...] (KONA) Kona Grill’s CEO Resigns (revised)