Note D - Revenues (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Dec. 29, 2019	Dec. 23, 2018	[1]	Mar. 31, 2019	Mar. 25, 2018
Contract with Customer, Liability, Current	$ 278			$ 318
Contract with Customer, Liability, Noncurrent	2,036			$ 2,687
Cumulative Effect of New Accounting Principle in Period of Adoption	2,735				$ (2,004)
Contract with Customer, Liability, Revenue Recognized	$ 781	$ 348

[1] Includes the cumulative effect of adopting Topic 606 of $2,735.