By all means step away for a day or two, let things cool down a bit, but on your return, I'd advise sitting down with the more sensible and rational one of the two of them, and try to talk it out, take the responsibility for your actions, admit guilt where it's deserved, and try to make them believe that the drugs were not yours.
I imagine apart from the damage, the main concern for your parents is the drugs.
I don't know how well off you are, but if you've not left them in a financial hole, doing some chores and helping around the house would show some good, if you can't cover the cost of the table, and I know I couldn't when I broke stuff by being silly.
In the end, they're your parents, and they want to sort it out and get past it and they'll still love you.