Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Revenues	$ 376,777	$ 309,767
Direct cost of revenues (exclusive of depreciation and amortization)	(319,352)	(252,392)
Gross profit	57,425	57,375
Operating expenses:
Selling, general and administrative (i)	51,783	49,151
Depreciation and amortization	4,442	5,679
Research and development	1,010	725
Total operating expenses	57,235	55,555
Other operating (loss) gains	(11,252)	2,520
(Loss) income from operations	(11,062)	4,340
Interest expense, net	(478)	(1,241)
Other income, net	189	6,022
(Loss) income from continuing operations before income taxes	(11,351)	9,121
Benefit from income taxes	3,263	4,052
(Loss) income from continuing operations	(8,088)	13,173
Discontinued operations, net of tax:
Income from discontinued operations	1,015	2,666
Income on sale of discontinued operations	2,000	0
Total discontinued operations	3,015	2,666
Net (loss) income	(5,073)	15,839
Net loss (income) attributable to noncontrolling interests	747	(191)
Net (loss) income attributable to IDT Corporation	(4,326)	15,648
Amounts attributable to IDT Corporation common stockholders:
(Loss) income from continuing operations	(8,236)	12,958
Income from discontinued operations	3,910	2,690
Net (loss) income	(4,326)	15,648
Basic:
(Loss) income from continuing operations	$ (0.40)	$ 0.63
Income from discontinued operations	$ 0.19	$ 0.13
Net (loss) income	$ (0.21)	$ 0.76
Weighted-average number of shares used in calculation of basic earnings per share	20,365	20,544
Diluted:
(Loss) income from continuing operations	$ (0.40)	$ 0.58
Income from discontinued operations	$ 0.19	$ 0.12
Net (loss) income	$ (0.21)	$ 0.70
Weighted-average number of shares used in calculation of diluted earnings per share	20,365	22,378
Dividends declared per common share	$ 0.23	$ 0
(i) Stock-based compensation included in selling, general and administrative expenses	$ 684	$ 344