Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Income Statement [Abstract]
REVENUES		$ 1,238,854	$ 1,364,057	$ 1,446,990
COSTS AND EXPENSES:
Direct cost of revenues (exclusive of depreciation and amortization)		875,734	1,034,430	1,154,048
Selling, general and administrative	[1]	276,891	250,481	218,467
Depreciation and amortization		20,136	18,115	17,764
Severance		935	116	452
TOTAL COSTS AND EXPENSES		1,173,696	1,303,142	1,390,731
Other operating (expense) gain, net (see Note 14)		(4,415)	(826)	731
Income from operations		60,743	60,089	56,990
Interest income, net		3,147	146	318
Other (expense) income, net		(3,083)	(25,352)	7,916
Income before income taxes		60,807	34,883	65,224
(Provision for) benefit from income taxes		(16,441)	(5,878)	31,667
NET INCOME		44,366	29,005	96,891
Net income attributable to noncontrolling interests		(3,874)	(1,977)	(416)
NET INCOME ATTRIBUTABLE TO IDT CORPORATION		$ 40,492	$ 27,028	$ 96,475
Earnings per share attributable to IDT Corporation common stockholders:
Basic		$ 1.59	$ 1.05	$ 3.78
Diluted		$ 1.58	$ 1.03	$ 3.70
Weighted-average number of shares used in calculation of earnings per share:
Basic		25,517	25,791	25,495
Diluted		25,577	26,356	26,053

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