Note 3 - Discontinued Operations - Asset and Liabilities in Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Mar. 31, 2018
Noncurrent Assets Held For Sale-Discontinued Operations		$ 1,739	$ 20,182	$ 1,739	$ 20,182	$ 20,098
Net Sales			37,547		123,629
Cost of Product Sold			36,280		124,297
Loss From Discontinued Operations Before Income Taxes			(180)		(4,723)
Net Earnings (Loss) From Discontinued Operations, Net of Tax		34,056	(1,157)	42,211	(3,909)
Modesto Facility [Member] | Discontinued Operations, Disposed of by Sale [Member]
Accounts Receivable		1,441	7,490	1,441	7,490	12,586
Inventories		4,645	129,738	4,645	129,738	96,996
Other Current Assets		5,977		5,977		288
Current Assets Held For Sale-Discontinued Operations		12,063	137,228	12,063	137,228	109,870
Other Assets		1,739	1,574	1,739	1,574	1,616
Property, Plant and Equipment (net)			18,608		18,608	18,482
Noncurrent Assets Held For Sale-Discontinued Operations		1,739	20,182	1,739	20,182	20,098
Accounts Payable and Accrued Expenses		8,697	18,338	8,697	18,338	26,226
Long-Term Debt and Capital Leases Current Portion			2,309		2,309	2,347
Current Liabilities Held For Sale		8,697	20,647	8,697	20,647	28,573
Long-Term Debt and Capital Lease Obligations			8,565		8,565	7,964
Noncurrent Liabilities Held For Sale			8,565		8,565	$ 7,964
Net Sales		1,644	37,547	111,693	123,629
Cost of Product Sold		5,796	36,280	129,872	124,297
Selling, General and Administrative		137	910	1,135	2,446
Plant Restructuring Charge (a)	[1]	854		4,350
Interest (Income) Expense (b)	[2]		537	1,077	1,609
Total cost and expenses		6,787	37,727	136,434	128,352
Loss From Discontinued Operations Before Income Taxes		(5,143)	(180)	(24,741)	(4,723)
Gain on the Sale of Assets Before Income Taxes (c) (d) (e)	[3],[4],[5]	(50,411)		(80,677)
Income Tax Expense (Benefit)		11,212	977	13,725	(814)
Net Earnings (Loss) From Discontinued Operations, Net of Tax		34,056	(1,157)	42,211	(3,909)
Capital Expenditures			621	3,937	1,889
Depreciation		$ 7	$ 491	$ 1,302	$ 1,583

[1] Includes $278,000 and $3,579,000 of Modesto severance in the three and nine month periods of fiscal 2019, respectively.

[2] Includes interest on debt directly related to Modesto including the building mortgage and equipment leases and an allocation of the Company's line of credit facility.

[3] Includes $50,411,000 and $51,491,000 gain on the sale of Modesto plant and equipment in the three and nine month periods of fiscal 2019, respectively.

[4] Includes a $24,211,000 gain as a result of LIFO layer liquidations from the disposal of the inventory for nine months.

[5] Includes a $4,975,000 gain on the sale of bins for the nine months period.