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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Mar. 01, 2015
Notes Tables |
Schedule of Effect of Significant Unobservable Inputs for Investment [TableText Block] |
|  | At March 1, 2015 |  |  | At May 25, 2014 |
Revenue growth rates |  |  | 4% |  |  |  |  | 4% |  |
Expense growth rates |  |  | 4% |  |  |  |  | 4% |  |
Income tax rates |  |  | 15% |  |  |  |  | 15% |  |
Discount rates |  | 15% | to | 21% |  |  | 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 March 1, 2015 |
10% increase in revenue growth rates |  | $ | 2,100 |
10% increase in expense growth rates |  | $ | (1,800 | )
10% increase in income tax rates |  | $ | (100 | )
10% increase in discount rates |  | $ | (1,700 | )
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair Value at March 1, 2015 |  |  | Fair Value at May 25, 2014 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in private company |  |  | - |  |  |  | - |  |  |  | 61,100 |  |  |  | - |  |  |  | - |  |  |  | 39,600 |
Total |  | $ | - |  |  | $ | - |  |  | $ | 61,100 |  |  | $ | - |  |  | $ | - |  |  | $ | 39,600 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  |  | - |  |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 44 |  |  |  | - |
Total |  | $ | - |  |  | $ | 2 |  |  | $ | - |  |  | $ | - |  |  | $ | 44 |  |  | $ | - |
Revenue Recognition, Multiple-deliverable Arrangements [Table Text Block] |
|  | Three months ended March 1 , 201 5 |  |  | Three months ended February 23 , 201 4 |  |  | Nine months ended March 1 , 201 5 |  |  | Nine months ended February 23 , 201 4 |
Recorded upon shipment |  | $ | 128,502 |  |  | $ | 112,902 |  |  | $ | 344,506 |  |  | $ | 295,314 |
Recorded upon acceptance in foreign port |  |  | 8,086 |  |  |  | 10,677 |  |  |  | 56,779 |  |  |  | 55,006 |
Revenue from license fees, R&D contracts and royalties/profit sharing |  |  | 153 |  |  |  | 447 |  |  |  | 788 |  |  |  | 648 |
Revenue from multiple element arrangements |  |  | 1,789 |  |  |  | 2,353 |  |  |  | 2,736 |  |  |  | 4,916 |
Total |  | $ | 138,530 |  |  | $ | 126,379 |  |  | $ | 404,809 |  |  | $ | 355,884 |

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