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Note 8 - Stockholders' Equity (Details) (USD $) | 12 Months Ended |  |  |
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May 25, 2014 | May 26, 2013 | May 27, 2012 | May 23, 2014 | May 29, 2011 | Jul. 14, 2010
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Common Stock, Voting Rights | one |  |  |  |  |
Preferred Stock, Shares Authorized | 2,000,000 |  |  |  |  |
Preferred Stock, Shares Outstanding | 0 |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 2,000,000 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 2,000,000 | 422,977 | 449,643 |  | 640,976 |
Shares Paid for Tax Withholding for Share Based Compensation | 47,573 | 145,159 | 326,954 |  |  |
Payments Related to Tax Withholding for Share-based Compensation (in Dollars) | $ 1,271,000 | $ 49,000 | $ 260,000 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Options Vested Outstanding Number | 984,610 | 1,262,934 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares | 231,250 | 76,958 |  |  |  |
Share Price (in Dollars per share) |  |  |  | $ 12.01 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options | 852,916 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars) | 2,300,000 |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | 2,000,000 |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 1 year 328 days |  |  |  |  |
Stock Repurchase Program, Authorized Amount (in Dollars) |  |  |  |  |  | 10,000,000
Stock Repurchased and Retired During Period, Shares |  |  | 917,244 |  |  |
Stock Repurchased and Retired During Period, Value (in Dollars) |  |  | $ 5,000,000 |  |  |
Director [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Goods and Nonemployee Services Transaction, Shares Approved for Issuance | 30,000 |  |  |  |  |
Employee Stock Option [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 1,215,860 | 1,339,892 | 2,046,432 |  | 2,318,753 |
Employee Stock Option [Member] | Maximum [Member] | 2013 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 500,000 |  |  |  |  |
Stock Grants and Stock Units [Member] | Maximum [Member] | 2013 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 250,000 |  |  |  |  |
Stock Appreciation Rights (SARs) [Member] | Maximum [Member] | 2013 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 500,000 |  |  |  |  |
Optionee First Becomes Non-Employee Director [Member] | 1995 Directors' Stock Option Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Shares Purchasable with Nonstatutory Stock Option | 20,000 |  |  |  |  |
Served on Board of Directors for at Least Six Months [Member] | 1995 Directors' Stock Option Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Shares Purchasable with Nonstatutory Stock Option | 10,000 |  |  |  |  |
2013 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 2,000,000 |  |  |  |  |
2009 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
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 | 1,000,000 |  |  |  |  |
2005 Stock Incentive Plan [Member] |  |  |  |  |  |
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 861,038 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 283,250 |  |  |  |  |

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) that have been approved for issuance in the equity-based payment transaction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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