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Business Segment Information (Details) - Schedule of net long-lived assets and total assets by geographic areas - USD ($) $ in Thousands | Jul. 31, 2020 | Jul. 31, 2019
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Business Segment Information (Details) - Schedule of net long-lived assets and total assets by geographic areas [Line Items] |  |
Long-lived assets, net | $ 30,061 | $ 34,355
Total assets | 404,750 | 443,703
United States [Member] |  |
Business Segment Information (Details) - Schedule of net long-lived assets and total assets by geographic areas [Line Items] |  |
Long-lived assets, net | 18,834 | 25,797
Total assets | 102,176 | 103,113
Foreign Countries [Member] |  |
Business Segment Information (Details) - Schedule of net long-lived assets and total assets by geographic areas [Line Items] |  |
Long-lived assets, net | 11,227 | 8,558
Total assets | $ 302,574 | $ 340,590

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