Note G - Long-term Investment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 26, 2017	Mar. 27, 2016	Mar. 29, 2015	Sep. 23, 2012
Investment Owned, Balance, Shares				351,550
Long-term Investments	$ 0	$ 0		$ 500
Cost Method Investment Ownership Percentage				2.50%
Cost-method Investments, Other than Temporary Impairment		$ 100