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Summary Of Significant Accounting Policies [Line Items]

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

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Amount of noncurrent assets classified as other.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	May 25, 2019	May 26, 2018	May 27, 2017
Summary Of Significant Accounting Policies [Line Items]
Revenue	$ 728,999,000	$ 654,129,000	$ 583,411,000
Goodwill impairment	$ 0	0	0
Stock options vesting period	4 years
Other assets	$ 3,180,000	2,049,000
Accounting Standards Update 2018-15 [Member]
Summary Of Significant Accounting Policies [Line Items]
Other assets	800,000
Reimbursements [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue	$ 12,300,000	$ 11,800,000	$ 10,100,000
Conversion Fees [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue percentage	0.50%	0.40%	0.50%
Permanent Placement Fees [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue percentage	0.60%	0.30%	0.10%
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful lives	3 years
Stock options vesting period	1 year
Minimum [Member] \| Accounting Standards Update 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Expected impact of new accounting standard	$ 45,000,000
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful lives	10 years
Stock options vesting period	4 years
Maximum [Member] \| Accounting Standards Update 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Expected impact of new accounting standard	$ 50,000,000