how do i link my sqlite(PDO) databse data to highcarts code

I'm trying to create line chart so i'm using highcarts and they have the code for it but i just don't know how i put my sqlite database value on it. I thought of changing the value by my self but again if the database data changes i have to do it again. so i though i will use json_encode

<?php
    $db = new PDO('sqlite:randvalue.sqlite');
    $sth = $db->query('SELECT revenue_value FROM company');
    $sth->execute();
    $results=$sth->fetchAll(PDO::FETCH_ASSOC);
    $json=json_encode($results);

    echo $json  
?>

and the result is

but the code highchart provided has a different format

the full code highchart provided http://ift.tt/1k1aRS4

so how do I implement my sqlite database value on to highchart code. To be honest i have no idea what i'm saying or doing.