Note J - Income Taxes - The Earliest Tax Years Subject to Examination by Taxing Authorities (Details) - Earliest Tax Year [Member]	12 Months Ended
	Mar. 25, 2018
Domestic Tax Authority [Member]
Earliest tax year subject to examination	2015
New York State [Member]
Earliest tax year subject to examination	2015
New York City [Member]
Earliest tax year subject to examination	2015
New Jersey [Member]
Earliest tax year subject to examination	2014
Pennsylvania [Member]
Earliest tax year subject to examination	2015
Virginia [Member]
Earliest tax year subject to examination	2015