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. 28, 2021	Mar. 29, 2020
Franchised restaurants operating at the beginning of the period	216	255
New franchised restaurants opened during the period	7	16
Franchised restaurants closed during the period	(10)	(55)
Franchised restaurants operating at the end of the period	213	216