Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Oct. 31, 2023	Oct. 31, 2022
Income Statement [Abstract]
Revenues		$ 301,205	$ 321,816
Direct cost of revenues		206,777	232,670
Gross profit		94,428	89,146
Operating expenses (gains):
Selling, general and administrative	[1]	77,222	69,620
Severance		525	100
Other operating gain, net (see Note 10)		(484)	(800)
Total operating expenses		77,263	68,920
Income from operations		17,165	20,226
Interest income, net		844	509
Other expense, net		(5,586)	(3,842)
Income before income taxes		12,423	16,893
Provision for income taxes		(3,947)	(4,338)
Net income		8,476	12,555
Net income attributable to noncontrolling interests		(817)	(1,553)
Net income attributable to IDT Corporation		$ 7,659	$ 11,002
Earnings per share attributable to IDT Corporation common stockholders:
Basic		$ 0.30	$ 0.43
Diluted		$ 0.30	$ 0.43
Weighted-average number of shares used in calculation of earnings per share:
Basic		25,178	25,603
Diluted		25,277	25,616

[1] Stock-based compensation included in selling, general and administrative expense