| Schedule of Intangible Assets and Goodwill [Table Text Block] |
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As of May 31 |
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2015 |
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2014 |
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Weighted Average Life (years) |
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Cost |
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Accumulated Amortization |
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Net |
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Cost |
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Accumulated Amortization |
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Net |
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| Other intangible assets subject to amortization: |
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| Customer relationships |
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20 |
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$ |
462,534 |
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(86,052 |
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376,482 |
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470,679 |
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(63,989 |
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406,690 |
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| Existing technology / trade names |
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11 |
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314,850 |
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(99,565 |
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215,285 |
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314,350 |
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(71,246 |
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243,104 |
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| Corporate trade name |
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15 |
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40,000 |
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(10,088 |
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29,912 |
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40,000 |
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(7,421 |
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32,579 |
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| Below market leasehold interests |
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7 |
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1,200 |
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(557 |
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643 |
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1,200 |
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(449 |
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751 |
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| Other intangibles |
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4 |
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428 |
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(156 |
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272 |
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399 |
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(53 |
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346 |
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| Total amortizable assets |
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819,012 |
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(196,418 |
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622,594 |
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826,628 |
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(143,158 |
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683,470 |
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| Other intangible assets not subject to amortization: |
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| In-process research and development |
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27,700 |
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- |
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27,700 |
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9,400 |
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- |
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9,400 |
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| Total non-amortizable assets |
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27,700 |
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- |
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27,700 |
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9,400 |
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- |
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9,400 |
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| Other intangible assets, net |
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$ |
846,712 |
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(196,418 |
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650,294 |
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836,028 |
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(143,158 |
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692,870 |
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