Note 4 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 25, 2018	Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015	Mar. 02, 2014
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		32.85%	34.00%	35.00%
One-time Transition Tax Provision, Current Income Tax Expense on Untaxed Foreign Earnings		$ 23,139,000,000
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	1,963,000,000
Foreign Earnings Repatriated		135,300,000	$ 6,800,000	$ 61,000,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	0	0	0
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	11,430,000	11,430,000	16,343,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	30,745,000	30,745,000	30,647,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	0	0	47,000
Deferred Tax Assets, Valuation Allowance, Total	10,602,000	10,602,000	10,571,000
Unrecognized Tax Benefits, Ending Balance			501,000	$ 1,024,000	$ 1,255,000	$ 1,135,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	41,000	41,000	16,000
Prepaid Expenses and Other Current Assets [Member]
Deferred Tax Assets, Net of Valuation Allowance, Current, Ending Balance	624,000	624,000	268,000
Current Liabilities [Member]
Unrecognized Tax Benefits, Ending Balance	543,000	$ 543,000	1,041,000
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Year		2019
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Year		2038
Kansas [Member]
Tax Credit Carryforward, Amount	225,000	$ 225,000	225,000
Arizona [Member]
Tax Credit Carryforward, Amount	135,000	$ 135,000	$ 0
New York [Member] | Tax Year 2012 [Member]
Closed Tax Year		2012
New York [Member] | Tax Year 2013 [Member]
Closed Tax Year		2013
New York [Member] | Tax Year 2014 [Member]
Closed Tax Year		2014
New York [Member] | Tax Year 2015 [Member]
Closed Tax Year		2015
New York [Member] | Nelco Technology Zhuhai FTZ Ltd [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 10,602,000	$ 10,602,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 31,000