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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Nov. 30, 2014
Notes Tables |
Schedule Of Effect Of Significant Unobservable Inputs For Investment [TableText Block] |
|  | At November 30, 2014 |  |  | At May 25, 2014 |
Revenue growth rates |  |  | 4% |  |  |  | 4% |
Expense growth rates |  |  | 4% |  |  |  | 4% |
Income tax rates |  |  | 15% |  |  |  | 15% |
Discount rates |  |  | 16% to 22% |  |  |  | 16% to 22% |
Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] |
Impact on value of Windset investment as of November 30, 2014 |
10% increase in revenue growth rates |  | $ | 4,900 |
10% increase in expense growth rates |  | $ | (4,100 | )
10% increase in income tax rates |  | $ | — |
10% increase in discount rates |  | $ | (700 | )
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair Value at November 30, 2014 |  |  | Fair Value at May 25, 2014 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in private company |  |  | - |  |  |  | - |  |  |  | 59,000 |  |  |  | - |  |  |  | - |  |  |  | 39,600 |
Total |  | $ | - |  |  | $ | - |  |  | $ | 59,000 |  |  | $ | - |  |  | $ | - |  |  | $ | 39,600 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  |  | - |  |  |  | 9 |  |  |  | - |  |  |  | - |  |  |  | 44 |  |  |  | - |
Total |  | $ | - |  |  | $ | 9 |  |  | $ | - |  |  | $ | - |  |  | $ | 44 |  |  | $ | - |
Revenue Recognition, Multiple-deliverable Arrangements [Table Text Block] |
|  | Three months ended November 30 , 2014 |  |  | Three months ended November 24 , 201 3 |  |  | Six months ended November 30 , 2014 |  |  | Six months ended November 24 , 201 3 |
Recorded upon shipment |  | $ | 109,764 |  |  | $ | 95,002 |  |  | $ | 216,004 |  |  | $ | 182,412 |
Recorded upon acceptance in foreign port |  |  | 22,106 |  |  |  | 22,940 |  |  |  | 48,693 |  |  |  | 44,329 |
Revenue from license fees, R&D contracts and royalties/profit sharing |  |  | 423 |  |  |  | 143 |  |  |  | 635 |  |  |  | 201 |
Revenue from multiple element arrangements |  |  | 372 |  |  |  | 1,941 |  |  |  | 947 |  |  |  | 2,563 |
Total |  | $ | 132,665 |  |  | $ | 120,026 |  |  | $ | 266,279 |  |  | $ | 229,505 |

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- Definition Tabular disclosure of the recognition of revenue arrangements under which the entity does or will perform multiple revenue-generating activities, categorized by type of arrangement. This item includes certain revenue arrangements that include software elements. This item does not include multiple-deliverable arrangements for industries that prepare disclosures under specific requirements (for instance, construction-type and production-type contracts) otherwise provided for in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 25 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=19771336&loc=SL6750900-111635 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=19771336&loc=d3e50766-111635 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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