Note 6 - Restructuring Charges - Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Aug. 27, 2017	May 28, 2017	Aug. 28, 2016	Aug. 27, 2017	Aug. 28, 2016
Current Period Charges	$ 2,902		$ 23	$ 4,263	$ 93
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]
Total Costs Accrued to Date	4,063			4,063
Total Expected Costs	5,500			5,500
Accrued, Beginning Balance	3,484	$ 1,250		1,250
Current Period Charges	2,813	2,813		4,063
Cash Payments		(512)
Non-Cash Charges		(67)
Accrued, Ending Balance		3,484
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Facility Lease Costs [Member]
Total Costs Accrued to Date	2,753			2,753
Total Expected Costs	2,753			2,753
Accrued, Beginning Balance	2,753
Current Period Charges		2,753
Cash Payments
Non-Cash Charges
Accrued, Ending Balance		2,753
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Employee Severance [Member]
Total Costs Accrued to Date	1,122			1,122
Total Expected Costs	1,122			1,122
Accrued, Beginning Balance	731	1,183		1,183
Current Period Charges		(61)
Cash Payments		(391)
Non-Cash Charges
Accrued, Ending Balance		731
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Equipment Removal [Member]
Total Costs Accrued to Date
Total Expected Costs	700			700
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] | Other Restructuring [Member]
Total Costs Accrued to Date	188			188
Total Expected Costs	925			925
Accrued, Beginning Balance		67		$ 67
Current Period Charges		121
Cash Payments		(121)
Non-Cash Charges		(67)
Accrued, Ending Balance