{"cik":1005731,"taxonomy":"us-gaap","tag":"AmortizationOfIntangibleAssets","label":"Amortization of Intangible Assets","description":"The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.","entityName":"IDT CORP","units":{"USD":[{"start":"2010-08-01","end":"2011-07-31","val":900000,"accn":"0001193125-13-399818","fy":2013,"fp":"FY","form":"10-K","filed":"2013-10-15","frame":"CY2011"},{"start":"2011-08-01","end":"2012-07-31","val":700000,"accn":"0001193125-13-399818","fy":2013,"fp":"FY","form":"10-K","filed":"2013-10-15"},{"start":"2011-08-01","end":"2012-07-31","val":700000,"accn":"0001213900-14-007233","fy":2014,"fp":"FY","form":"10-K","filed":"2014-10-14","frame":"CY2012"},{"start":"2012-08-01","end":"2013-07-31","val":600000,"accn":"0001193125-13-399818","fy":2013,"fp":"FY","form":"10-K","filed":"2013-10-15"},{"start":"2012-08-01","end":"2013-07-31","val":600000,"accn":"0001213900-14-007233","fy":2014,"fp":"FY","form":"10-K","filed":"2014-10-14"},{"start":"2012-08-01","end":"2013-07-31","val":600000,"accn":"0001213900-15-007660","fy":2015,"fp":"FY","form":"10-K","filed":"2015-10-14","frame":"CY2013"},{"start":"2013-08-01","end":"2014-07-31","val":600000,"accn":"0001213900-14-007233","fy":2014,"fp":"FY","form":"10-K","filed":"2014-10-14"},{"start":"2013-08-01","end":"2014-07-31","val":600000,"accn":"0001213900-15-007660","fy":2015,"fp":"FY","form":"10-K","filed":"2015-10-14"},{"start":"2013-08-01","end":"2014-07-31","val":600000,"accn":"0001213900-16-017511","fy":2016,"fp":"FY","form":"10-K","filed":"2016-10-14","frame":"CY2014"},{"start":"2014-08-01","end":"2015-07-31","val":400000,"accn":"0001213900-15-007660","fy":2015,"fp":"FY","form":"10-K","filed":"2015-10-14"},{"start":"2014-08-01","end":"2015-07-31","val":400000,"accn":"0001213900-16-017511","fy":2016,"fp":"FY","form":"10-K","filed":"2016-10-14"},{"start":"2014-08-01","end":"2015-07-31","val":400000,"accn":"0001213900-17-010610","fy":2017,"fp":"FY","form":"10-K","filed":"2017-10-16","frame":"CY2015"},{"start":"2015-08-01","end":"2016-07-31","val":400000,"accn":"0001213900-16-017511","fy":2016,"fp":"FY","form":"10-K","filed":"2016-10-14"},{"start":"2015-08-01","end":"2016-07-31","val":400000,"accn":"0001213900-17-010610","fy":2017,"fp":"FY","form":"10-K","filed":"2017-10-16","frame":"CY2016"},{"start":"2016-08-01","end":"2017-07-31","val":300000,"accn":"0001213900-17-010610","fy":2017,"fp":"FY","form":"10-K","filed":"2017-10-16"},{"start":"2016-08-01","end":"2017-07-31","val":300000,"accn":"0001213900-19-020184","fy":2019,"fp":"FY","form":"10-K","filed":"2019-10-11","frame":"CY2017"},{"start":"2017-08-01","end":"2018-07-31","val":100000,"accn":"0001213900-19-020184","fy":2019,"fp":"FY","form":"10-K","filed":"2019-10-11","frame":"CY2018"},{"start":"2018-08-01","end":"2019-07-31","val":300000,"accn":"0001213900-19-020184","fy":2019,"fp":"FY","form":"10-K","filed":"2019-10-11"},{"start":"2018-08-01","end":"2019-07-31","val":300000,"accn":"0001213900-20-031279","fy":2020,"fp":"FY","form":"10-K","filed":"2020-10-14","frame":"CY2019"},{"start":"2019-08-01","end":"2020-07-31","val":400000,"accn":"0001213900-20-031279","fy":2020,"fp":"FY","form":"10-K","filed":"2020-10-14"},{"start":"2019-08-01","end":"2020-07-31","val":400000,"accn":"0001493152-21-025444","fy":2021,"fp":"FY","form":"10-K","filed":"2021-10-14"},{"start":"2019-08-01","end":"2020-07-31","val":400000,"accn":"0001493152-22-028469","fy":2022,"fp":"FY","form":"10-K","filed":"2022-10-14","frame":"CY2020"},{"start":"2020-08-01","end":"2021-07-31","val":700000,"accn":"0001493152-21-025444","fy":2021,"fp":"FY","form":"10-K","filed":"2021-10-14"},{"start":"2020-08-01","end":"2021-07-31","val":700000,"accn":"0001493152-22-028469","fy":2022,"fp":"FY","form":"10-K","filed":"2022-10-14"},{"start":"2020-08-01","end":"2021-07-31","val":700000,"accn":"0001493152-23-037384","fy":2023,"fp":"FY","form":"10-K","filed":"2023-10-16","frame":"CY2021"},{"start":"2021-08-01","end":"2022-07-31","val":1300000,"accn":"0001493152-22-028469","fy":2022,"fp":"FY","form":"10-K","filed":"2022-10-14"},{"start":"2021-08-01","end":"2022-07-31","val":1300000,"accn":"0001493152-23-037384","fy":2023,"fp":"FY","form":"10-K","filed":"2023-10-16"},{"start":"2021-08-01","end":"2022-07-31","val":1300000,"accn":"0001493152-24-041147","fy":2024,"fp":"FY","form":"10-K","filed":"2024-10-15","frame":"CY2022"},{"start":"2022-08-01","end":"2023-07-31","val":1500000,"accn":"0001493152-23-037384","fy":2023,"fp":"FY","form":"10-K","filed":"2023-10-16"},{"start":"2022-08-01","end":"2023-07-31","val":1500000,"accn":"0001493152-24-041147","fy":2024,"fp":"FY","form":"10-K","filed":"2024-10-15"},{"start":"2022-08-01","end":"2023-07-31","val":1500000,"accn":"0001493152-25-016071","fy":2025,"fp":"FY","form":"10-K","filed":"2025-09-29","frame":"CY2023"},{"start":"2023-08-01","end":"2024-07-31","val":1300000,"accn":"0001493152-24-041147","fy":2024,"fp":"FY","form":"10-K","filed":"2024-10-15"},{"start":"2023-08-01","end":"2024-07-31","val":1300000,"accn":"0001493152-25-016071","fy":2025,"fp":"FY","form":"10-K","filed":"2025-09-29"},{"start":"2023-08-01","end":"2024-07-31","val":1300000,"accn":"0001437749-26-031469","fy":2026,"fp":"FY","form":"10-K","filed":"2026-09-29","frame":"CY2024"},{"start":"2024-08-01","end":"2025-07-31","val":1500000,"accn":"0001493152-25-016071","fy":2025,"fp":"FY","form":"10-K","filed":"2025-09-29"},{"start":"2024-08-01","end":"2025-07-31","val":1500000,"accn":"0001437749-26-031469","fy":2026,"fp":"FY","form":"10-K","filed":"2026-09-29","frame":"CY2025"},{"start":"2025-08-01","end":"2026-07-31","val":1400000,"accn":"0001437749-26-031469","fy":2026,"fp":"FY","form":"10-K","filed":"2026-09-29","frame":"CY2026"}]}}