Note B - Adoption of New Accounting Pronouncements (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 25, 2016	Dec. 27, 2015
Income Tax Expense (Benefit)	$ 448,000	$ 316,000	$ 3,986,000	$ 3,886,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 77,000		$ 142,000
New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit)	$ (38,000)		$ (659,000)