Note 4 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Mar. 01, 2020	Mar. 03, 2019
Undistributed Earnings, Basic, Total	$ 25,000
Foreign Earnings Repatriated	0	$ 0	$ 100,216
Effective Income Tax Rate Reconciliation, Operating Loss Carryforwards, Amount			64
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount			191
Deferred Tax Assets, Valuation Allowance, Total	3,587	3,587
Unrecognized Tax Benefits, Ending Balance	4,078	4,117	4,164	$ 937
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	460	335
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits, Ending Balance	4,537	4,452
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	0	0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	2,030	2,160
State and Local Jurisdiction [Member] | Arizona Department of Revenue [Member]
Tax Credit Carryforward, Amount		991	$ 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, Total	3,587
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Year	2023
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Year	2039
Foreign Tax Authority [Member]
Operating Loss Carryforwards	$ 7,790	$ 7,798