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. 26, 2017	Mar. 27, 2016	Mar. 29, 2015
Franchised restaurants operating at the beginning of the period	259	296	324
New franchised restaurants opened during the period	53	56	36
Franchised restaurants closed during the period	(33)	(93)	(64)
Franchised restaurants operating at the end of the period	279	259	296