Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Oct. 31, 2022	Oct. 31, 2021
Income Statement [Abstract]
Revenues		$ 321,816	$ 370,083
Costs and expenses:
Direct cost of revenues (exclusive of depreciation and amortization)		231,636	291,625
Selling, general and administrative	[1]	65,864	60,113
Depreciation and amortization		4,790	4,446
Severance		100	38
Total costs and expenses		302,390	356,222
Other operating gain (expense), net (see Note 10)		800	(88)
Income from operations		20,226	13,773
Interest income, net		509	13
Other expense, net		(3,842)	(16,216)
Income (loss) before income taxes		16,893	(2,430)
(Provision for) benefit from income taxes		(4,338)	85
Net income (loss)		12,555	(2,345)
Net (income) attributable to noncontrolling interests		(1,553)	(133)
Net income (loss) attributable to IDT Corporation		$ 11,002	$ (2,478)
Earnings (loss) per share attributable to IDT Corporation common stockholders:
Basic		$ 0.43	$ (0.10)
Diluted		$ 0.43	$ (0.10)
Weighted-average number of shares used in calculation of earnings (loss) per share:
Basic		25,603	25,566
Diluted		25,616	25,566

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