Note 13 - Discontinued Operations - Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 01, 2020	Mar. 03, 2019	Feb. 25, 2018
Current Period Charges			$ 146
Accrued, Ending Balance	432
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]
Accrued, Beginning Balance	1,324
Current Period Charges	108	262	$ 4,876
Cash Payments	(1,725)
Non-Cash Charges
Accrued, Ending Balance	432	1,324
Total Costs Accrued to Date	5,523
Total Expected Costs	5,617
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Facility Lease Costs [Member]
Accrued, Beginning Balance	1,324
Current Period Charges	99
Cash Payments	(991)
Non-Cash Charges
Accrued, Ending Balance	432	1,324
Total Costs Accrued to Date	2,929
Total Expected Costs	3,000
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
Total Expected Costs	1,081
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Equipment Removal [Member]
Accrued, Beginning Balance
Current Period Charges	586
Cash Payments	(586)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	586
Total Expected Costs	586
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Other Restructuring [Member]
Accrued, Beginning Balance
Current Period Charges	148
Cash Payments	(148)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	927
Total Expected Costs	$ 950