Note D - Revenues - Revenues by Geographical Market (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 26, 2021	Dec. 27, 2020
Revenues	$ 25,913	$ 18,030	$ 90,110	$ 57,555
UNITED STATES
Revenues	25,066	17,810	87,545	56,723
Non-US [Member]
Revenues	$ 847	$ 220	$ 2,565	$ 832