Note B - Summary of Significant Accounting Policies - Summary of Franchise Openings and Closings for the Nathan's Franchise Restaurant System (Details) - Franchised Units [Member]	12 Months Ended
	Mar. 31, 2019	Mar. 25, 2018	Mar. 26, 2017
Franchised restaurants operating at the beginning of the period	276	279	259
New franchised restaurants opened during the period	13	40	53
Franchised restaurants closed during the period	(34)	(43)	(33)
Franchised restaurants operating at the end of the period	255	276	279