XML 69 R59.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Schedule of Carrying Value of Equity Investments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Oct. 31, 2022 | Oct. 31, 2021
Investments, Debt and Equity Securities [Abstract] |  |
Balance, beginning of period | $ 1,401 | $ 2,743
Adjustment for observable transactions involving a similar investment from the same issuer | (27) | (346)
Impairments |  |
Balance, end of the period | $ 1,374 | $ 2,397

X
- Definition Adjustment for observable transactions involving a similar investment from the same issuer. + References No definition available. + Details
Name: | IDT_AdjustmentForObservableTransactionsInvolvingSimilarInvestmentFromSameIssuer
Namespace Prefix: | IDT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
Name: | us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
Name: | us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration