Note 13 - Discontinued Operations - Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 03, 2019	Mar. 03, 2019	Feb. 25, 2018	Feb. 26, 2017
Current Period Charges			$ 146
Accrued, Ending Balance	$ 1,324	1,324
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]
Accrued, Beginning Balance	2,176
Current Period Charges	261	262	$ 4,429
Cash Payments	(1,113)
Non-Cash Charges
Accrued, Ending Balance	1,324	1,324
Total Costs Accrued to Date	4,690	4,690
Total Expected Costs	5,500	5,500
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Facility Lease Costs [Member]
Accrued, Beginning Balance	2,176
Current Period Charges	81
Cash Payments	(933)
Non-Cash Charges
Accrued, Ending Balance	1,324	1,324
Total Costs Accrued to Date	2,830	2,830
Total Expected Costs	2,830	2,830
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Employee Severance [Member]
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	1,081	1,081
Total Expected Costs	1,081	1,081
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	700
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Other Restructuring [Member]
Accrued, Beginning Balance
Current Period Charges	180
Cash Payments	(180)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	779	779
Total Expected Costs	$ 889	$ 889