Kona Grill Inc. announced preliminary restaurant sales for the quarter and year ended December 31, 2015. For the quarter, restaurant sales increased 20.6% to $38.1 million compared to $31.6 million for the same quarter last year. Same-store sales increased 3.2% compared to an increase of 3.1% in the same quarter last year.

For the year, restaurant sales increased 20.1% to $143.0 million, compared to $119.1 million for the same period last year. The increase was driven by sales associated with the opening of seven restaurants during 2015, four of which were opened in the fourth quarter, incremental sales from five restaurants opened during 2014 and same-store sales growth of 2.0%.