Note 4 - Income Taxes (Details) - Components of Deferred Tax Liabilities and Assets (USD $) In Thousands, unless otherwise specified	Mar. 01, 2015	Mar. 02, 2014
Deferred tax assets:
Depreciation and amortization	$ 3,856	$ 4,593
Net operating loss carryforwards	14,686	12,210
Tax credits carryforward	1,811	1,695
Stock options	1,899	1,693
Other, net	531us-gaap_DeferredTaxAssetsOther	665us-gaap_DeferredTaxAssetsOther
	22,783us-gaap_DeferredTaxAssetsGross	20,856us-gaap_DeferredTaxAssetsGross
Valuation allowance on deferred tax assets	(11,887)	(11,941)
Total deferred tax assets, net of valuation allowance	10,896us-gaap_DeferredTaxAssetsNet	8,915us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Depreciation	(446)	(867)
Undistributed earnings	(63,958)	(63,958)
Other	(1,257)us-gaap_DeferredTaxLiabilitiesOther	(1,616)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	(65,661)us-gaap_DeferredIncomeTaxLiabilities	(66,441)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liability	$ (54,765)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (57,526)us-gaap_DeferredTaxAssetsLiabilitiesNet

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