Revolving Credit Facility (Details Narrative) - USD ($)	9 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Jul. 31, 2023	May 17, 2021
Line of Credit Facility [Line Items]
Proceeds from lines of credit	$ 32,864,000	$ 2,383,000
Repayment of lines of credit	32,864,000	2,383,000
IDT Telecom [Member]
Line of Credit Facility [Line Items]
Outstanding line of credit	0		$ 0
Proceeds from lines of credit	32,900,000	2,400,000
Repayment of lines of credit	$ 32,900,000	$ 2,400,000
Revolving Credit Facility [Member] | TD Bank [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 25,000,000.0
Credit facility, description	The revolving credit facility is secured by primarily all of IDT Telecom’s assets. The principal outstanding bears interest per annum at the secured overnight financing rate published by the Federal Reserve Bank of New York plus 10 basis points, plus depending upon IDT Telecom’s leverage ratio as computed for the most recent fiscal quarter, 125 to 175 basis points. Interest is payable monthly, and all outstanding principal and any accrued and unpaid interest is due on May 16, 2026. IDT Telecom pays a quarterly unused commitment fee on the average daily balance of the unused portion of the $25.0 million commitment of 30 to 85 basis points, depending upon IDT Telecom’s leverage ratio as computed for the most recent fiscal quarter.
Debt instrument maturity date	May 16, 2026
Revolving credit, unused portion amount				$ 25,000,000.0