Note 4 - Income Taxes - Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Feb. 27, 2022	Feb. 28, 2021
Deferred tax assets:
Net operating loss carryforwards	$ 2,598	$ 2,602
Tax credits carryforward	991	991
Stock options	977	1,235
Other, net	174	774
Deferred Tax Assets, Gross, Total	4,740	5,602
Valuation allowance on deferred tax assets	(3,587)	(3,587)
Total deferred tax assets, net of valuation allowance	1,153	2,015
Deferred tax liabilities:
Depreciation	(2,492)	(2,045)
Undistributed earnings	(2)	(4)
Other	(556)	(702)
Total deferred tax liabilities	(3,050)	(2,751)
Net deferred tax liability	$ (1,897)	$ (736)