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Note 6 - Restructuring Charges (Details Textual) (USD $)	3 Months Ended	9 Months Ended		12 Months Ended
	Nov. 30, 2014	Nov. 30, 2014	Dec. 01, 2013	Mar. 03, 2013
Restructuring and Related Activities [Abstract]
Restructuring Charges	$ 636,000us-gaap_RestructuringCharges	$ 986,000us-gaap_RestructuringCharges	$ 319,000us-gaap_RestructuringCharges
Employee Severance [Member]
Restructuring and Related Activities [Abstract]
Restructuring and Related Cost, Incurred Cost	496,000
Payments for Restructuring	230,000
Restructuring Reserve	266,000	266,000
Nelco Technology Zhuhai FTZ Ltd [Member]
Restructuring and Related Activities [Abstract]
Business Exit Costs				2,730,000
Other Asset Impairment Charges				3,620,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax				1,465,000
Real Estate Held-for-sale	2,029,000	2,029,000
Restructuring Charges	35,000	166,000
New England Laminates Co Inc [Member]
Restructuring and Related Activities [Abstract]
Real Estate Held-for-sale	0	0
Restructuring Charges	$ 126,000	$ 346,000