Note D - Accounts and Other Receivables, Net - Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 25, 2018	Mar. 26, 2017
Beginning balance	$ 468	$ 457	$ 471
Reclassification to conform with Topic 606	77
Bad debt expense	100	34	53
Accounts written off	(60)	(23)	(67)
Ending balance	$ 585	$ 468	$ 457