Note 8 - Restructuring Charges (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 25, 2018	Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
Restructuring Charges, Total		$ 5,022,000	$ 313,000	$ 535,000
New England Laminates Co., Inc. [Member]
Real Estate Held-for-sale	$ 0	0
Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member]
Restructuring Charges, Total	4,429,000	4,429,000
Restructuring and Related Cost, Expected Cost Remaining	$ 1,010,000	1,010,000
Closure of New England Laminates Co., Inc. Business Unit [Member] | Facility Closing [Member]
Restructuring Charges, Total		447,000	313,000
Closure of Park Advanced Composite Materials, Inc. Business Unit [Member] | Facility Closing [Member]
Restructuring Charges, Total		$ 146,000	$ 0