Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Jul. 31, 2016

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of accumulated balances for each classification of other comprehensive income (loss)

(in thousands)	Unrealized gain (loss) on available-for- sale securities			Foreign currency translation			Accumulated other comprehensive income (loss)			Location of (Gain) Loss Recognized
Balance at July 31, 2013	$	—		$	2,341		$	2,341
Other comprehensive income attributable to IDT Corporation		(8	)		1,335			1,327
Balance at July 31, 2014		(8	)		3,676			3,668
Sale of interest in Fabrix Systems Ltd.		—			102			102
Other comprehensive loss attributable to IDT Corporation		(567	)		(2,432	)		(2,999	)
Balance at July 31, 2015		(575	)		1,346			771
Zedge Spin-Off		—			1,029			1,029
Other comprehensive income (loss) attributable to IDT Corporation before reclassification		1,126			(6,127	)		(5,001	)
Less: reclassification for gain included in net income		(543	)		—			(543	)	Other income (expense), net
Net other comprehensive income (loss) attributable to IDT Corporation		583			(6,127	)		(5,544	)
BALANCE AT JULY 31, 2016	$	8		$	(3,752	)	$	(3,744	)