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Schedule of Impact of Acquisition's Purchase Price Allocations on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Dec. 03, 2020	Jul. 31, 2020	Dec. 11, 2019	Jul. 31, 2019
AcquistionsLineItem [Line Items]
Goodwill	$ 14,897		$ 12,858		$ 11,209
IDT International Telecom, Inc [Member]
AcquistionsLineItem [Line Items]
Trade accounts receivable		$ 656
Other current assets		1,644
Property, plant, and equipment		75
Goodwill		2,025
Customer relationships (7-year useful life)		1,960
Tradename (2-year useful life)		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 acquired		$ 2,781
Ringsouth Europa SL [Member]
AcquistionsLineItem [Line Items]
Trade accounts receivable				$ 142
Other current assets				21
Property, plant, and equipment				84
Goodwill				1,437
Customer relationships (7-year useful life)				130
Tradename (2-year useful life)				30
Deferred income tax assets				118
Other assets				10
Trade accounts payable				(302)
Accrued expenses				(136)
Other current liabilities				(408)
Non-compete agreement (4-year useful life)				50
Other liabilities				(351)
Net assets acquired				$ 825

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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