Note 4 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015	Mar. 02, 2014
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 0
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	16,343,000	$ 10,083,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	30,647,000	30,871,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	258,000	524,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	47,000	0
Deferred Tax Assets, Valuation Allowance	10,571,000	11,115,000
Unrecognized Tax Benefits	1,024,000	1,255,000	$ 1,135,000	$ 276,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	16,000	51,000
Prepaid Expenses and Other Current Assets [Member]
Deferred Tax Assets, Net of Valuation Allowance, Current	268,000	584,000
Current Liabilities [Member]
Unrecognized Tax Benefits	$ 1,041,000	1,295,000
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Year	2018
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Year	2037
Foreign Tax Authority [Member]
Operating Loss Carryforwards Expiration Year	2027
New York [Member]
Tax Credit Carryforward, Amount	$ 0	478,000
New York [Member] | Tax Year 2012 [Member]
Income Tax Examination, Year under Examination	2012
New York [Member] | Tax Year 2013 [Member]
Income Tax Examination, Year under Examination	2013
New York [Member] | Tax Year 2014 [Member]
Income Tax Examination, Year under Examination	2014
New York [Member] | Tax Year 2015 [Member]
Income Tax Examination, Year under Examination	2015
New York [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Year	2017
Kansas [Member]
Tax Credit Carryforward, Amount	$ 225,000	225,000
Arizona [Member]
Tax Credit Carryforward, Amount	135,000	135,000
Nelco Products Pte Ltd [Member]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 6,800,000	61,000,000	$ 0
Nelco Technology Zhuhai FTZ Ltd [Member] | New York [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 544,000