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Other Intangible Assets (Notes) | 3 Months Ended
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Oct. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Other Intangible Assets Other intangible assets as of October 31, 2021 and July 31, 2021, consisted of the following:
| October 31, 2021 |  | July 31, 2021
| 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 |  | $ | 1,814 |  |  | $ | (530) |  |  | $ | 1,284 |  |  | 3 |  | $ | 1,821 |  |  | $ | (356) |  |  | $ | 1,465 |
Customer relationships | 9 |  | 110,615 |  |  | (42,152) |  |  | 68,463 |  |  | 9 |  | 110,950 |  |  | (39,069) |  |  | 71,881 |
Technology | 5 |  | 9,533 |  |  | (832) |  |  | 8,701 |  |  | 5 |  | 9,578 |  |  | (335) |  |  | 9,243 |
Unamortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames | N/A |  | 9,771 |  |  | — |  |  | 9,771 |  |  | N/A |  | 9,745 |  |  | — |  |  | 9,745 |
Total |  |  | $ | 131,733 |  |  | $ | (43,514) |  |  | $ | 88,219 |  |  |  |  | $ | 132,094 |  |  | $ | (39,760) |  |  | $ | 92,334 |
The change in the gross carrying amount of other intangible assets as of October 31, 2021 compared to July 31, 2021 was due to the effect of currency fluctuations during the three-month period. Amortization expense on intangible assets was $3,807 and $1,351 for the three months ended October 31, 2021 and 2020, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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