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Document And Entity Information
Oct. 28, 2020
Document Information Line Items  
Entity Registrant Name IDT CORPORATION
Trading Symbol IDT
Document Type 8-K
Current Fiscal Year End Date --07-31
Amendment Flag false
Entity Central Index Key 0001005731
Document Period End Date Oct. 28, 2020
Entity Emerging Growth Company false
Entity Incorporation, State or Country Code DE
Entity File Number 1-16371
Entity Tax Identification Number 22-3415036
Entity Address, Address Line One 520 Broad Street
Entity Address, City or Town Newark
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07102
City Area Code (973)
Local Phone Number 438-1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(g) Security Class B common stock, par value $0.01 per share
Security Exchange Name NYSE