How much percocet is enough to be detected in a hair follicle drug test?

I took 1 percocet a month ago. It was given to me by a friend after I fell and hurt my back snowboarding. I have a hair drug test coming up and want to know if the drug will show up in my test and if it does will it matter since it's such a small dosage? I obviously don't have a prescription but it was only one pill and was taken a month ago. I know that drugs usually show up for 90 days on a user but will one percocet taken a month ago be strong enough to be detected in one of these tests? I haven't taken any other prescription pain killers other than this since I had my wisdom teeth removed 5 years ago.