Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
May 25, 2019	May 26, 2018	May 27, 2017
Income Taxes [Abstract]
Income taxes payable		$ 3,300,000
Income tax receivable	$ 1,000,000
Tax benefit related to stock-based compensation for nonqualified stock options expensed and for eligible disqualifying ISO exercises and shares issued under ESPP	1,800,000	1,100,000
Foreign net operating loss carryforwards	63,500,000
Tax credit carryforward	500,000
Undistributed earnings of foreign subsidiaries	17,600,000
Unrecognized tax benefits	42,000	42,000	$ 42,000
Unrecognized tax benefit classified as long-term liability	$ 42,000	$ 42,000

Unrecognized Tax Benefits, Long Term

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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Amount of unrecognized tax benefits.

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