Note 4 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 03, 2019	Mar. 03, 2019	Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	32.90%	34.00%
One-time Transition Tax Provision, Current Income Tax Expense on Untaxed Foreign Earnings		$ 23,139,000
One-time Transition Tax Provision, Current Income Tax Expense on Untaxed Foreign Earnings, Payment Period		8 years
One-time Transition Tax Liability after Utilizing Current Year Domestic Losses	$ 21,887,000	$ 21,887,000
One-time Transition Tax Liability after Utilizing Current Year Domestic Losses, Current	1,751,000	1,751,000
One-time Transition Tax Liability after Utilizing Current Year Domestic Losses, Noncurrent	20,136,000	20,136,000
Deferred Tax Liability Reversed		44,309,000
Income Tax Benefit, Reversal of Deferred Tax Liability		18,456,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	1,963,000
Undistributed Earnings, Basic, Total		25,000,000
Foreign Earnings Repatriated		113,600,000	$ 135,300,000	$ 6,800,000
Deferred Tax Assets, Valuation Allowance, Total	2,755,000	2,755,000	2,981,000
Unrecognized Tax Benefits, Ending Balance	937,000	937,000	314,000		$ 267,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	79,000	$ 79,000	41,000
Closed Tax Year		2016
Current Liabilities [Member]
Unrecognized Tax Benefits, Ending Balance	1,016,000	$ 1,016,000	543,000
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	0	0	142,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	3,161,000	3,161,000	5,909,000
State and Local Jurisdiction [Member] | Kansas Department of Revenue [Member]
Tax Credit Carryforward, Amount	0	0	225,000
State and Local Jurisdiction [Member] | Arizona Department of Revenue [Member]
Tax Credit Carryforward, Amount	135,000	135,000
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	2,755,000	2,755,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 226,000
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Year		2020
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Year		2039
Foreign Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 7,862,000	$ 7,862,000	$ 7,862,000