Note 10 - Discontinued Operations - Summary for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 25, 2018	Nov. 26, 2017	Nov. 25, 2018	Nov. 26, 2017	Feb. 25, 2018	[1]
Net earnings from discontinued operations	$ 1,613	$ 372	$ 4,841	$ 1,355
Electronics Business [Member] | Discontinued Operations, Held-for-sale [Member]
Net sales	16,680	15,910	55,232	53,082
Cost of sales	13,962	12,805	42,899	41,983
Gross profit	2,718	3,105	12,333	11,099
Selling, general and administrative expenses	2,597	2,098	7,643	6,213
Restructuring charges	836	662	1,593	5,300
Earnings (loss) from discontinued operations	(715)	345	3,097	(414)
Other income	2,945		2,945
Earnings (loss) from discontinued operations before income taxes	2,230	345	6,042	(414)
Income tax provision (benefit)	617	(27)	1,201	(1,769)
Net earnings from discontinued operations	1,613	$ 372	4,841	$ 1,355
Accounts Receivable, Net	12,261		12,261		$ 12,801
Inventories	9,950		9,950		7,201
Fixed Assets, Net	6,041		6,041		6,727
Prepaid Expenses and Other Current Assets	899		899		646
Total Major Assets Included as Part of Discontinued Operations	29,151		29,151		27,375
Other Assets	5,368		5,368		5,072
Total Assets Included as Part of Discontinued Operations	34,519		34,519		32,447
Accounts Payable	3,717		3,717		2,200
Accrued Liabilities	4,460		4,460		4,360
Deferred Income Taxes	618		618		618
Income Taxes Payable	1,334		1,334		1,364
Total Major Liabilities Included as Part of Discontinued Operations	10,129		10,129		8,542
Other Liabilities	229		229		229
Total Liabilities Included as Part of Discontinued Operations	$ 10,358		$ 10,358		$ 8,771

[1] These amounts have not been audited and are based on the audited financial statements.