Note 8 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Apr. 27, 2013	Apr. 28, 2012
Deferred tax assets:
Accrued expenses and other	$ 5,241	$ 5,173
Inventory and amortizable assets	355	450
Total deferred tax assets	5,596	5,623
Deferred tax liabilities:
Property	16,159	16,186
Intangibles and other	99	101
Total deferred tax liabilities	16,258	16,287
Net deferred tax liabilities	10,662	10,664
Current deferred tax assets – net	3,665	3,550
Noncurrent deferred tax liabilities – net	$ 14,327	$ 14,214