Note 7 - Restructuring Charges (Details Textual) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Nov. 29, 2015	May. 31, 2015	Nov. 30, 2014	Nov. 29, 2015	Nov. 30, 2014	Mar. 03, 2013	Feb. 29, 2004
Nelco Technology Zhuhai FTZ Ltd [Member]
Gain (Loss) on Disposition of Property Plant Equipment		$ 0
Business Exit Costs	$ 8,000		$ 35,000	$ 83,000	$ 166,000	$ 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
Proceeds from Sale of Property, Plant, and Equipment		$ 2,026,000
New England Laminates Co Inc [Member]
Business Exit Costs	150,000		126,000	290,000	346,000
Real Estate Held-for-sale							$ 0
UNITED STATES
Restructuring Reserve	0			0
Restructuring Charges			496,000
Payments for Restructuring				504,000
Proceeds from Sale of Property, Plant, and Equipment				2,026,000	0
Restructuring Charges	$ 158,000		$ 636,000	$ 373,000	$ 986,000