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Intangible Assets and Long-Lived Assets (Tables) | 12 Months Ended
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Jul. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Other intangible assets as of July 31, 2021 and 2020, consisted of the following:
| July 31, 2021 |  | July 31, 2020
| Weighted Average Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Weighted Average Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Amortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames | 3 |  | $ | 1,821 |  |  | $ | (356) |  |  | $ | 1,465 |  |  | 3 |  | $ | 663 |  |  | $ | (55) |  |  | $ | 608 |
Customer relationships | 9 |  | 110,950 |  |  | (39,069) |  |  | 71,881 |  |  | 9 |  | 44,722 |  |  | (32,615) |  |  | 12,107 |
Technology | 5 |  | 9,578 |  |  | (335) |  |  | 9,243 |  |  | N/A |  | — |  |  | — |  |  | — |
Unamortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames | N/A |  | 9,745 |  |  | — |  |  | 9,745 |  |  | N/A |  | 9,619 |  |  | — |  |  | 9,619 |
Total |  |  | $ | 132,094 |  |  | $ | (39,760) |  |  | $ | 92,334 |  |  |  |  | $ | 55,004 |  |  | $ | (32,670) |  |  | $ | 22,334 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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