Basis of Presentation	6 Months Ended
Jan. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Note 1—Basis of Presentation The accompanying unaudited consolidated financial statements of IDT Corporation and its subsidiaries (the "Company" or "IDT") have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six months ended January 31, 2020 are not necessarily indicative of the results that may be expected for the fiscal year ending July 31, 2020. The balance sheet at July 31, 2019 has been derived from the Company's audited financial statements at that date but does not include all of the information and notes required by U.S. GAAP for complete financial statements. For further information, please refer to the consolidated financial statements and footnotes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended July 31, 2019, as filed with the U.S. Securities and Exchange Commission ("SEC"). The Company's fiscal year ends on July 31 of each calendar year. Each reference below to a fiscal year refers to the fiscal year ending in the calendar year indicated (e.g., fiscal 2020 refers to the fiscal year ending July 31, 2020).

Basis of Presentation

6 Months Ended

Jan. 31, 2020

Note 1—Basis of Presentation

The accompanying unaudited consolidated financial statements of IDT Corporation and its subsidiaries (the "Company" or "IDT") have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six months ended January 31, 2020 are not necessarily indicative of the results that may be expected for the fiscal year ending July 31, 2020. The balance sheet at July 31, 2019 has been derived from the Company's audited financial statements at that date but does not include all of the information and notes required by U.S. GAAP for complete financial statements. For further information, please refer to the consolidated financial statements and footnotes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended July 31, 2019, as filed with the U.S. Securities and Exchange Commission ("SEC").

The Company's fiscal year ends on July 31 of each calendar year. Each reference below to a fiscal year refers to the fiscal year ending in the calendar year indicated (e.g., fiscal 2020 refers to the fiscal year ending July 31, 2020).