Note 4 - Income Taxes - Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Feb. 26, 2023	Feb. 27, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 1,949	$ 2,598
Tax credits carryforward	991	991
Stock options	784	977
Other, net	590	174
Deferred Tax Assets, Gross	4,314	4,740
Valuation allowance on deferred tax assets	(2,938)	(3,587)
Total deferred tax assets, net of valuation allowance	1,376	1,153
Deferred tax liabilities:
Depreciation	(2,841)	(2,492)
Undistributed earnings	(2)	(2)
Other	(528)	(556)
Total deferred tax liabilities	(3,371)	(3,050)
Net deferred tax asset (liability)	$ (1,995)	$ (1,897)