Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Noncontrolling Interests	IDT Corp Additional Paid-In Capital	IDT Corp Treasury Stock	IDT Corp Accumulated Other Comprehensive Loss	IDT Corp Accumulated Deficit	IDT Corp Class A Common Stock	IDT Corp Class B Common Stock
Beginning Balance at Jul. 31, 2017	$ 154,557	$ 8,823	$ 394,462	$ (83,304)	$ (2,343)	$ (163,370)	$ 33	$ 256
Dividends declared ($0.19 per share)	(4,720)					(4,720)
Restricted Class B common stock purchased from employees	(23)			(23)
Stock-based compensation	810		810
Distributions to noncontrolling interests	(380)	(380)
Other comprehensive loss/income	(398)				(398)
Net loss	(1,797)	295				(2,092)
Ending Balance at Oct. 31, 2017	148,049	8,738	395,272	(83,327)	(2,741)	(170,182)	33	256
Beginning Balance at Jul. 31, 2018	31,303	639	294,047	(85,597)	(4,972)	(173,103)	33	256
Adjustment from the adoption of change in revenue recognition (see Note 2)/in accounting for equity investments (see Note 8) | ASU 2014-09	8,606					8,606
Adjustment from the adoption of change in revenue recognition (see Note 2)/in accounting for equity investments (see Note 8) | ASU 2016-01	1,173				33	1,140
ADJUSTED BALANCE at Jul. 31, 2018	41,082	639	294,047	(85,597)	(4,939)	(163,357)	33	256
Repurchases of Class B common stock through repurchase program	(3,854)			(3,854)
Stock-based compensation	413		413
Distributions to noncontrolling interests	(339)	(339)
Other comprehensive loss/income	522				522
Net loss	(1,148)	301				(1,449)
Ending Balance at Oct. 31, 2018	$ 36,676	$ 601	$ 294,460	$ (89,451)	$ (4,417)	$ (164,806)	$ 33	$ 256