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Schedule of Impact of Acquisition's Purchase Price Allocations on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands | Apr. 30, 2021 | Jul. 31, 2020
--- | --- | ---
Business Acquisition [Line Items] |  |
Goodwill | $ 14,943 | $ 12,858
IDT International Telecom, Inc [Member] |  |
Business Acquisition [Line Items] |  |
Trade accounts receivable | 656 |
Prepaid expenses | 1,644 |
Property, plant and equipment | 75 |
Goodwill | 2,025 |
Customer relationships (15-year useful lives) | 1,960 |
Tradenames (20-year useful lives) | 440 |
Deferred income tax assets | 197 |
Other assets | 30 |
Trade accounts payable | (1,306) |
Accrued expenses | (423) |
Other current liabilities | (329) |
Noncontrolling interests | (2,188) |
Net assets excluding cash acquired | $ 2,781 |

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