Note J - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 25, 2018	Mar. 26, 2017	Mar. 27, 2016
Unrecognized tax benefits, beginning of year	$ 167	$ 208	$ 266
Decreases of tax positions taken in prior years	(2)	(31)	(98)
Increases based on tax positions taken in current year	98	41	43
Settlements of tax positions taken in prior years		(51)	(3)
Unrecognized tax benefits, end of year	$ 263	$ 167	$ 208