Note 4 - Income Taxes - Effective Income Tax Reconciliation (Details)	12 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Mar. 01, 2020
Statutory U.S. Federal tax rate	21.00%	21.00%	21.00%
State and local taxes, net of federal benefit	4.30%	5.90%	0.10%
Foreign tax rate differentials	2.70%	0.70%	(0.60%)
Valuation allowance on deferred tax assets	0.00%	0.00%	(0.10%)
Adjustment on tax accruals	(0.30%)	0.00%	(17.60%)
ASC 740-10 change	0.50%	0.90%	23.50%
Foreign tax credits	0.00%	(0.10%)	(2.70%)
Subpart F	(1.00%)	1.10%	4.00%
Permanent differences and other	1.00%	(0.80%)	(0.10%)
Effective Income Tax Rate Reconciliation, Percent, Total	28.20%	28.70%	(27.50%)