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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies - Summary of Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | May. 31, 2015 | May. 25, 2014
--- | --- | ---
Fair Value, Inputs, Level 1 [Member] |  |
Investment in private company |  |
Total |  |
Liabilities: |  |
Interest rate swap |  |
Total |  |
Fair Value, Inputs, Level 2 [Member] |  |
Investment in private company |  |
Total |  |
Liabilities: |  |
Interest rate swap |  | $ 44
Total |  | 44
Fair Value, Inputs, Level 3 [Member] |  |
Investment in private company | $ 61,500 | 39,600
Total | $ 61,500 | $ 39,600
Liabilities: |  |
Interest rate swap |  |
Total |  |

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- Definition Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column C.3,4) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C.Column C.7) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column E.2,3) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13.Column C.6) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010 + Details
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