output.table([headers] + results, :header => true, :column_widths => header_widths, :row_colors => ['ffffff', 'f0f0f0']) do
                    row(0).style(:font_style => :bold, :background_color => 'D0D0D0')
                    cells.borders = [:top, :bottom, :left, :right]
                end unless results == nil