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. 25, 2018	Mar. 26, 2017	Mar. 27, 2016
Franchised restaurants operating at the beginning of the period	279	259	296
New franchised restaurants opened during the period	40	53	56
Franchised restaurants closed during the period	(43)	(33)	(93)
Franchised restaurants operating at the end of the period	276	279	259