Note 8 - Restructuring Charges - Restructuring Charges (Details) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 25, 2018	Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
Current Period Charges		$ 5,022,000	$ 313,000	$ 535,000
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]
Accrued, Beginning Balance
Current Period Charges	4,429,000	4,429,000
Cash Payments	(2,187,000)
Non-Cash Charges	(67,000)
Accrued, Ending Balance	2,175,000	2,175,000
Total Costs Accrued to Date	4,429,000	4,429,000
Total Expected Costs	5,500,000	5,500,000
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Facility Lease Costs [Member]
Accrued, Beginning Balance
Current Period Charges	2,749,000
Cash Payments	(511,000)
Non-Cash Charges
Accrued, Ending Balance	2,238,000	2,238,000
Total Costs Accrued to Date	2,749,000	2,749,000
Total Expected Costs	2,749,000	2,749,000
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Employee Severance [Member]
Accrued, Beginning Balance
Current Period Charges	1,081,000
Cash Payments	(1,081,000)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	1,081,000	1,081,000
Total Expected Costs	1,081,000	1,081,000
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Equipment Removal [Member]
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date
Total Expected Costs	700,000	700,000
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Other Restructuring [Member]
Accrued, Beginning Balance
Current Period Charges	599,000
Cash Payments	(595,000)
Non-Cash Charges	(67,000)
Accrued, Ending Balance	(63,000)	(63,000)
Total Costs Accrued to Date	599,000	599,000
Total Expected Costs	$ 970,000	$ 970,000