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Note 10 - Discontinued Operations - Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 25, 2018	Nov. 26, 2017	Nov. 25, 2018	Nov. 26, 2017	May 27, 2018	May 28, 2017
Cash, discontinued operations		$ (233)		$ (233)	$ (8)	$ (589)
Income (loss) from discontinued operations, before taxes		141		(62)
Income tax (expense) benefit		42		(18)
Income (loss) from discontinued operations, net of tax		99		(44)
Discontinued Operations [Member] | Food Export [Member]
Cash, discontinued operations					(8)
Accounts receivable					518
Inventory
Other assets
Total assets, discontinued operations					510
Accounts payable					230
Accrued expenses and other current liabilities					228
Total other current liabilities, discontinued operations					$ 458
Revenues		13,996		21,572
Cost of sales		(13,165)		(20,257)
Selling, general and administrative		(690)		(1,377)
Other
Income (loss) from discontinued operations, before taxes		141		(62)
Income tax (expense) benefit		(42)		18
Income (loss) from discontinued operations, net of tax		$ 99		$ (44)

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