Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Income Statement [Abstract]
Revenues		$ 299,643	$ 299,295	$ 896,946	$ 935,047
Direct cost of revenues		202,599	211,734	608,982	668,513
Gross profit		97,044	87,561	287,964	266,534
Operating expenses:
Selling, general and administrative	[1]	68,962	60,130	200,685	177,475
Research and Development Expense	[1]	12,640	12,145	37,975	35,870
Severance		779	145	1,648	458
Other operating expense, net (see Note 10)		3,231	4,764	3,041	3,948
Total operating expenses		85,612	77,184	243,349	217,751
Income from operations		11,432	10,377	44,615	48,783
Interest income, net		1,162	709	3,201	2,029
Other expense, net		(3,273)	(382)	(6,326)	(2,610)
Income before income taxes		9,321	10,704	41,490	48,202
Provision for income taxes		(2,979)	(2,960)	(10,918)	(12,594)
Net income		6,342	7,744	30,572	35,608
Net income attributable to noncontrolling interests		(791)	(854)	(2,937)	(3,093)
Net income attributable to IDT Corporation		$ 5,551	$ 6,890	$ 27,635	$ 32,515
Earnings per share attributable to IDT Corporation common stockholders:
Basic		$ 0.22	$ 0.27	$ 1.10	$ 1.27
Diluted		$ 0.22	$ 0.27	$ 1.09	$ 1.27
Weighted-average number of shares used in calculation of earnings per share:
Basic		25,345	25,518	25,233	25,544
Diluted		25,516	25,612	25,380	25,589

[1] Stock-based compensation included in: Technology and development expense & Selling, general and administrative expense