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Fair Value Measurements (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jan. 31, 2023 | Jan. 31, 2022 | Jan. 31, 2023 | Jan. 31, 2022 | Jul. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Investment in hedge funds | $ 3,100 |  | $ 3,100 |  | $ 3,200
Contingent consideration payment |  |  | 400 |  |
Gain on write-off of contingent consideration payment obligation |  |  | 1,565 |  |
Other Operating Income (Expense) [Member] |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Gain on write-off of contingent consideration payment obligation |  |  | $ 1,600 | $ 300 |

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