Note J - Revenues - Revenues by Geographical Market (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 23, 2018	Dec. 24, 2017		Dec. 23, 2018		Dec. 24, 2017
Revenues	$ 20,222	$ 22,021	[1]	$ 79,720	[1]	$ 84,295	[1]
UNITED STATES
Revenues	19,546	20,209		77,022		78,852
Non-US [Member]
Revenues	$ 676	$ 1,812		$ 2,698		$ 5,443

[1] As disclosed in Note B, prior period amounts have not been adjusted under the modified retrospective method of adoption of ASC 606.