EPL: Common stock, $0.001 par value per share. Authorized 75,000,000 shares; shares issued 40,243,074 and 40,091,664 at June 30, 2011 and December 31, 2010, respectively; shares outstanding 40,236,729 and 40,091,664 at June 30, 2011 and December 31, 2010, respectively