Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jul. 31, 2016

Subsidiary of Limited Liability Company or Limited Partnership [Line Items]

Schedule of weighted-average number of shares used in the calculation of basic and diluted earnings per share

Year ended July 31 (in thousands)	2016		2015		2014
Basic weighted-average number of shares		22,765		22,903		22,009
Effect of dilutive securities:
Stock options		6		23		92
Non-vested restricted Class B common stock		44		321		836
Diluted weighted-average number of shares		22,815		23,247		22,937

Summary of outstanding stock options excluded from calculation of diluted earnings per share

Year ended July 31 (in thousands)	2016		2015		2014
Shares excluded from the calculation of diluted earnings per share		209		136		70

Schedule of change in the allowance for doubtful accounts

Year ended July 31 (in thousands)	Balance at beginning of year		Additions charged to costs and expenses		Deductions (1)			Balance at end of year
2016
Reserves deducted from accounts receivable:
Allowance for doubtful accounts	$	5,645	$	1,519	$	(2,346	)	$	4,818
2015
Reserves deducted from accounts receivable:
Allowance for doubtful accounts	$	11,507	$	97	$	(5,959	)	$	5,645
2014
Reserves deducted from accounts receivable:
Allowance for doubtful accounts	$	13,079	$	500	$	(2,072	)	$	11,507

(1) Primarily uncollectible accounts written off, net of recoveries.

Zedge [Member]

Subsidiary of Limited Liability Company or Limited Partnership [Line Items]

Schedule of consolidated statements of income

Year ended July 31 (in thousands)	2016		2015			2014
INCOME (LOSS) BEFORE INCOME TAXES	$	2,518	$	(4	)	$	319
INCOME BEFORE INCOME TAXES ATTRIBUTABLE TO IDT CORPORATION	$	2,221	$	23		$	278