Note J - Revenues - Revenues by Geographical Market (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 24, 2018	Jun. 25, 2017
Revenues	$ 30,168	$ 30,803	[1]
UNITED STATES
Revenues	28,856	28,864
Non-US [Member]
Revenues	$ 1,312	$ 1,939

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