Number of options and non-options outstanding.

No definition available.

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As of the balance sheet date, the number of shares into which fully vested stock options outstanding can be converted under the option plan.

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No definition available.

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Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The highest quantity of shares an employee can purchase under the plan per period.

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Number of additional shares authorized for issuance under an established share-based compensation plan.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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- Definition

Number of non-vested options outstanding.

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No definition available.

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For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Note 6 - Stockholders' Equity (Details Textual) - USD ($)		12 Months Ended
	Oct. 19, 2017	May 27, 2018	May 28, 2017	May 29, 2016	Jul. 27, 2018	May 31, 2015	Oct. 10, 2013	Jul. 14, 2010	Oct. 15, 2009
Common Stock, Voting Rights		1
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Shares Outstanding, Ending Balance		0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		542,275	155,239	465,968		881,143
Shares Paid for Tax Withholding for Share Based Compensation		121,652	137,089	95,550
Payments Related to Tax Withholding for Share-based Compensation		$ 1,478,000	$ 434,000	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options Vested, Outstanding Number		1,383,732	1,021,097
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance		571,603	550,445
Issuance of common stock, per share (in dollars per share)		$ 14.05
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options, Ending Balance		548,692
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 178,000
Stock Repurchase Program, Authorized Amount								$ 10,000,000
Treasury Stock, Shares, Acquired		0	0	0
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		30,000
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		$ 3,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		1 year 328 days
Stock Incentive Plan 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		2,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant							2,000,000
Share--based Compensation Arrangement by Share-based Payment Award Options and Non Option Equity Instruments Outstanding Number		2,070,705
Stock Incentive Plan 2013 [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee		500,000
Stock Incentive Plan 2013 [Member] \| Stock Grants and Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee		250,000
Stock Incentive Plan 2013 [Member] \| Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee		500,000
Stock Incentive Plan 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized									1,900,000
Share--based Compensation Arrangement by Share-based Payment Award Options and Non Option Equity Instruments Outstanding Number					292,667