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Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2023 | Apr. 30, 2022
Finite-Lived Intangible Assets |  |  |  |
Amortization expense | $ 2.9 | $ 2.4 | $ 8.0 | $ 6.9
Isolere |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite lived intangible assets acquired in business combination | 44.5 |  | 44.5 |
Isolere | Technology |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite lived intangible assets acquired in business combination | 41.7 |  | $ 41.7 |
Finite lived intangible asset estimated useful life (in years) |  |  | 20 years |
Isolere | Trademarks |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite lived intangible assets acquired in business combination | 1.5 |  | $ 1.5 |
Finite lived intangible asset estimated useful life (in years) |  |  | 10 years |
Isolere | Non Compensation Agreement |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite lived intangible assets acquired in business combination | $ 1.3 |  | $ 1.3 |
Finite lived intangible asset estimated useful life (in years) |  |  | 3 years |

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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI https://asc.fasb.org/extlink&oid=123455525&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128092470&loc=d3e4845-128472 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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