Note 13 - Discontinued Operations - Summary for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 03, 2019	Nov. 25, 2018	Aug. 26, 2018	May 27, 2018	Feb. 25, 2018	Nov. 26, 2017	Aug. 27, 2017	May 28, 2017	Mar. 03, 2019	Feb. 25, 2018	Feb. 26, 2017
Discontinued operations, earnings before income taxes									$ 121,922	$ 820	$ 12,066
Income tax provision (benefit)									14,683	(1,303)	1,689
Net earnings from discontinued operations	$ 102,398	$ 1,613	$ 876	$ 2,352	$ 768	$ 372	$ (339)	$ 1,322	107,239	2,123	10,377
Total Current Assets Included as Part of Discontinued Operations					20,648					20,648
Total Non-Current Assets Included as Part of Discontinued Operations	0								0
Total Current Liabilities Included as Part of Discontinued Operations					7,924					7,924
Total Non-Current Liabilities Included as Part of Discontinued Operations	$ 0								0
Electronics Business [Member] | Discontinued Operations, Held-for-sale [Member]
Net sales									57,492	70,966	82,771
Cost of sales									44,361	55,794	61,030
Gross profit									13,131	15,172	21,741
Selling, general and administrative expenses									8,826	9,510	9,430
Restructuring charges									636	4,876	313
Earnings from discontinued operations									3,669	786	11,998
Other income									118,253	34	68
Discontinued operations, earnings before income taxes									121,922	820	12,066
Income tax provision (benefit)									14,683	(1,303)	1,689
Net earnings from discontinued operations									$ 107,239	2,123	$ 10,377
Accounts Receivable, Net					12,801					12,801
Inventories					7,201					7,201
Prepaid Expenses and Other Current Assets					646					646
Total Current Assets Included as Part of Discontinued Operations					20,648					20,648
Fixed Assets, Net					6,727					6,727
Other Assets					2,158					2,158
Total Non-Current Assets Included as Part of Discontinued Operations					8,885					8,885
Accounts Payable					2,200					2,200
Accrued Liabilities					4,360					4,360
Income Taxes Payable					1,364					1,364
Total Current Liabilities Included as Part of Discontinued Operations					7,924					7,924
Deferred Income Taxes					618					618
Other Liabilities					229					229
Total Non-Current Liabilities Included as Part of Discontinued Operations					$ 847					$ 847