Note 4 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Feb. 26, 2023	Feb. 27, 2022	Feb. 28, 2021	Mar. 01, 2020
Undistributed Earnings, Basic	$ 25,000
Tax Credit Carryforward, Amount	991
Deferred Tax Assets, Valuation Allowance	2,938	$ 3,587
Unrecognized Tax Benefits	1,424	4,078	$ 4,117	$ 4,164
Unrecognized Tax Benefits, Decrease Resulting From Stock Options Expiring Unexercised	214,000
Unrecognized Tax Benefits, Decrease Resulting From Uncertain Tax Positions	2,800
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	327	460
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits	1,751	4,537
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	1,725	2,030
State and Local Jurisdiction [Member] | Arizona Department of Revenue [Member]
Tax Credit Carryforward, Amount		991
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | Nelco Technology Zhuhai FTZ Ltd [Member]
Deferred Tax Assets, Valuation Allowance	2,938
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	0
Foreign Tax Authority [Member]
Operating Loss Carryforwards	$ 7,791	$ 7,790