XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.19.1

IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Details Textual) - USD ($) $ in Thousands | Jan. 31, 2019 | Jul. 31, 2018
--- | --- | ---
IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Textual) |  |
Allowance for doubtful accounts | $ 1,715 | $ 2,192

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

X
- Definition Amount classified as allowance for doubtful accounts attributable to disposal group held for sale or disposed of. + References No definition available. + Details
Name: | idt_DisposalGroupIncludingDiscontinuedOperationAllowanceForDoubtfulAccounts
Namespace Prefix: | idt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant