Note 10 - Discontinued Operations - Summary for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 26, 2018	Aug. 27, 2017	Aug. 26, 2018	Aug. 27, 2017	Feb. 25, 2018
Net earnings (loss) from discontinued operations	$ 876	$ (339)	$ 3,228	$ 983
Electronics Business [Member] | Discontinued Operations, Held-for-sale [Member]
Net sales	17,843	18,481	38,552	37,172
Cost of sales	13,884	14,512	28,937	29,178
Gross profit	3,959	3,969	9,615	7,994
Selling, general and administrative expenses	2,448	2,203	5,046	4,115
Restructuring charges	454	2,902	757	4,638
Earnings (loss) from discontinued operations before income taxes	1,057	(1,136)	3,812	(759)
Income tax (benefit) provision	181	(797)	584	(1,742)
Net earnings (loss) from discontinued operations	876	$ (339)	3,228	$ 983
Accounts Receivable, Net	13,081		13,081		$ 12,801
Inventories	8,717		8,717		7,201
Fixed Assets, Net	6,190		6,190		6,727
Prepaid Expenses and Other Current Assets	826		826		646
Total Major Assets Included as Part of Discontinued Operations	28,814		28,814		27,375
Other Assets	5,216		5,216		5,072
Total Assets Included as Part of Discontinued Operations	34,030		34,030		32,447
Accounts Payable	2,736		2,736		2,200
Accrued Liabilities	4,200		4,200		4,360
Deferred Income Taxes	618		618		618
Income Taxes Payable	1,234		1,234		1,364
Total Major Liabilities Included as Part of Discontinued Operations	8,788		8,788		8,542
Other Liabilities	228		228		229
Total Liabilities Included as Part of Discontinued Operations	$ 9,016		$ 9,016		$ 8,771