Note O - Long-term Debt - Summary of Debt (Details) - USD ($)	Sep. 23, 2018	Mar. 25, 2018
Senior secured notes	$ 150,000,000
Less: unamortized debt issuance costs	(4,896,000)	$ (5,242,000)
Long-term debt, net	145,104,000	144,758,000
Senior Secured 2025 Notes [Member] \| Senior Notes [Member]
Senior secured notes	$ 150,000,000	$ 150,000,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant