Note B - Adoption of New Accounting Pronouncements (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Sep. 25, 2016	Jun. 26, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
New Accounting Pronouncement, Early Adoption, Effect [Member] \| Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit)		$ 621,000
Income Tax Expense (Benefit)	$ 1,918,000		$ 1,942,000	$ 3,538,000	$ 3,570,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation					$ 65,000

Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 740
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65880886&loc=d3e23524-113945

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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