December 30 (SeeNews) - The main share indices of the Zagreb Stock Exchange (ZSE) closed a tad higher on Thursday, the last trading day for this year, as gains in Atlantska Plovidba [ZSE:ATPL], Hrvatska Postanska Banka [ZSE:HPB] and Koncar Elektroindustrija [ZSE:KOEI] offset losses in Adris [ZSE:ADRS] and Podravka [ZSE:PODR], bourse data showed.