IDT (IDT) 10-Q 12 Mar 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jan. 31, 2015	Mar. 09, 2015
Document Information [Line Items]
Entity Registrant Name	IDT CORP
Entity Central Index Key	1005731
Amendment Flag	FALSE
Current Fiscal Year End Date	-24
Document Type	10-Q
Document Period End Date	31-Jan-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Filer Category	Accelerated Filer
Class A common stock [Member]
Document Information [Line Items]
Entity Common Stock Shares Outstanding		1,574,326
Class B common stock [Member]
Document Information [Line Items]
Entity Common Stock Shares Outstanding		21,890,447

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jan. 31, 2015	Jul. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$133,141	$153,823
Restricted cash and cash equivalents-short-term	69,197	65,706
Marketable securities	19,041	12,873
Trade accounts receivable, net of allowance for doubtful accounts of $6,123 at January 31, 2015 and $11,507 at July 31, 2014	55,796	69,330
Receivable from sale of interest in Fabrix Systems Ltd.	28,290
Prepaid expenses	16,253	21,799
Deferred income tax assets, net-current portion	2,026	2,953
Other current assets	10,377	12,381
Total current assets	334,121	338,865
Property, plant and equipment, net	86,235	81,760
Goodwill	14,446	14,830
Other intangibles, net	1,490	1,742
Investments	11,376	10,008
Restricted cash and cash equivalents-long-term		2,763
Deferred income tax assets, net-long-term portion	14,733	16,248
Other assets	18,002	14,715
Total assets	480,403	480,931
Current liabilities:
Revolving credit loan payable		13,000
Trade accounts payable	30,186	42,135
Accrued expenses	137,920	142,528
Deferred revenue	87,753	101,165
Customer deposits	64,555	62,685
Income taxes payable	401	732
Notes payable-current portion	6,492	271
Other current liabilities	4,119	5,468
Total current liabilities	331,426	367,984
Notes payable-long-term portion		6,353
Other liabilities	1,829	5,430
Total liabilities	333,255	379,767
Commitments and contingencies
IDT Corporation stockholders' equity:
Preferred stock, $.01 par value; authorized shares-10,000; no shares issued
Additional paid-in capital	399,325	392,858
Treasury stock, at cost, consisting of 1,698 and 1,698 shares of Class A common stock and 2,980 and 2,934 shares of Class B common stock at January 31, 2015 and July 31, 2014, respectively	-100,545	-99,841
Accumulated other comprehensive (loss) income	-192	3,668
Accumulated deficit	-152,950	-196,725
Total IDT Corporation stockholders' equity	145,919	100,239
Noncontrolling interests	1,229	925
Total equity	147,148	101,164
Total liabilities and equity	480,403	480,931
Class A common stock [Member]
IDT Corporation stockholders' equity:
Common stock, value	33	33
Class B common stock [Member]
IDT Corporation stockholders' equity:
Common stock, value	$248	$246

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jan. 31, 2015	Jul. 31, 2014
In Thousands, except Per Share data, unless otherwise specified
Allowance for doubtful accounts	$6,123	$11,507
Preferred stock, par value	$0.01	$0.01
Preferred stock, authorized shares	10,000	10,000
Preferred stock, shares issued
Class A common stock [Member]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	35,000	35,000
Common stock, shares issued	3,272	3,272
Common stock, shares outstanding	1,574	1,574
Treasury stock, common stock shares	1,698	1,698
Class B common stock [Member]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	24,849	24,587
Common stock, shares outstanding	21,869	21,653
Treasury stock, common stock shares	2,980	2,934

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015		Jan. 31, 2014		Jan. 31, 2015		Jan. 31, 2014
Consolidated Statements of Income [Abstract]
Revenues	$394,173		$406,423		$807,051		$827,093
Costs and expenses:
Direct cost of revenues (exclusive of depreciation and amortization)	328,737		335,258		672,544		685,577
Selling, general and administrative (i)	57,394	[1]	57,285	[1]	114,392	[1]	115,040	[1]
Depreciation and amortization	4,440		4,059		8,845		7,955
Research and development			2,597		1,656		4,873
Severance	351				1,899
Total costs and expenses	390,922		399,199		799,336		813,445
Gain on sale of interest in Fabrix Systems Ltd.	484				75,629
Other operating gains, net			350				1,209
Income from operations	3,735		7,574		83,344		14,857
Interest (expense) income, net	-40		105		-131		80
Other income (expense), net	967		-3,065		2,290		-3,614
Income before income taxes	4,662		4,614		85,503		11,323
Provision for income taxes	-1,905		-1,641		-2,392		-4,300
Net income	2,757		2,973		83,111		7,023
Net income attributable to noncontrolling interests	-247		-438		-445		-965
Net income attributable to IDT Corporation	2,510		2,535		82,666		6,058
Earnings per share attributable to IDT Corporation common stockholders:
Basic	$0.11		$0.12		$3.63		$0.28
Diluted	$0.11		$0.11		$3.57		$0.27
Weighted-average number of shares used in calculation of earnings per share:
Basic	22,818		21,572		22,783		21,305
Diluted	23,225		22,743		23,155		22,827
Dividends declared per common share	$0.82		$0.17		$1.67		$0.17
(i) Stock-based compensation included in selling, general and administrative expenses	$2,172		$1,632		$3,020		$4,127
[1]	Stock-based compensation included in selling, general and administrative expenses

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$2,757	$2,973	$83,111	$7,023
Other comprehensive (loss) income:
Change in unrealized gain on available-for-sale securities	8		15
Foreign currency translation adjustments	-2,119	518	-3,977	1,182
Other comprehensive (loss) income	-2,111	518	-3,962	1,182
Comprehensive income	646	3,491	79,149	8,205
Comprehensive income attributable to noncontrolling interests	-247	-438	-445	-965
Comprehensive income attributable to IDT Corporation	$399	$3,053	$78,704	$7,240

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Operating activities
Net income	$83,111	$7,023
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,845	7,955
Deferred income taxes	2,441	2,614
Provision for doubtful accounts receivable	35	548
Gain on sale of interest in Fabrix Systems Ltd.	-75,629
Gain on proceeds from insurance		-571
Realized loss on marketable securities	54
Interest in the equity of investments	-1,459	-852
Stock-based compensation	3,020	4,127
Change in assets and liabilities:
Restricted cash and cash equivalents	-7,912	-19,077
Trade accounts receivable	3,285	3,465
Prepaid expenses, other current assets and other assets	5,787	-2,119
Trade accounts payable, accrued expenses, other current liabilities and other liabilities	-7,478	-23,300
Customer deposits	8,193	22,777
Income taxes payable	-292	665
Deferred revenue	-1,047	5,873
Net cash provided by operating activities	20,954	9,128
Investing activities
Capital expenditures	-13,946	-7,847
Proceeds from sale of interest in Fabrix Systems Ltd, net of cash and cash equivalents sold.	36,039
Purchase of investments	-125
Proceeds from sale and redemption of investments	43	1,019
Proceeds from insurance		571
Purchases of marketable securities	-18,382	-11,631
Proceeds from maturities and sales of marketable securities	12,104	10,094
Net cash provided by (used in) investing activities	15,733	-7,794
Financing activities
Dividends paid	-38,891	-5,754
Distributions to noncontrolling interests	-750	-626
Purchases of stock of subsidiary		-1,133
Proceeds from exercise of stock options	2,896	528
Proceeds from revolving credit loan payable		30,000
Repayments of revolving credit loan payable and other borrowings	-13,132	-36,187
Repurchases of Class B common stock	-703	-955
Net cash used in financing activities	-50,580	-14,127
Effect of exchange rate changes on cash and cash equivalents	-6,789	-646
Net decrease in cash and cash equivalents	-20,682	-13,439
Cash and cash equivalents at beginning of period	153,823	151,600
Cash and cash equivalents at end of period	133,141	138,161
Supplemental schedule of non-cash investing and financing activities
Net liabilities excluding cash and cash equivalents of Fabrix Systems Ltd. sold	14,333
Adjustment to liabilities in connection with the Straight Path Spin-Off		$1,624

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Jan. 31, 2015
Basis of Presentation [Abstract]
Basis of Presentation	Note 1—Basis of Presentation
	The accompanying unaudited consolidated financial statements of IDT Corporation and its subsidiaries (the “Company” or “IDT”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six months ended January 31, 2015 are not necessarily indicative of the results that may be expected for the fiscal year ending July 31, 2015. The balance sheet at July 31, 2014 has been derived from the Company’s audited financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. For further information, please refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended July 31, 2014, as filed with the U.S. Securities and Exchange Commission (“SEC”).
	The Company’s fiscal year ends on July 31 of each calendar year. Each reference below to a fiscal year refers to the fiscal year ending in the calendar year indicated (e.g., fiscal 2015 refers to the fiscal year ending July 31, 2015).
	In the consolidated statements of cash flow, $4.6 million previously included in “Restricted cash and cash equivalents” at July 31, 2013 was reclassified to “Cash and cash equivalents” to conform to the current year’s presentation.

Sale_of_Interest_in_Fabrix_Sys

Sale of Interest in Fabrix Systems Ltd.	6 Months Ended
	Jan. 31, 2015
Sale of Interest in Fabrix Systems Ltd. [Abstract]
Sale of Interest in Fabrix Systems Ltd.	Note 2—Sale of Interest in Fabrix Systems Ltd.
	On October 8, 2014, the Company completed the sale of its interest in Fabrix Systems Ltd. (“Fabrix”) to Telefonaktiebolget LM Ericsson (publ) (“Ericsson”). The final sale price for 100% of the shares in Fabrix was $95 million in cash, excluding transaction costs and working capital and other adjustments. The Company owned approximately 78% of Fabrix on a fully diluted basis. The Company’s share of the sale price was $68.0 million, after reflecting the impact of working capital and other adjustments. As of January 31, 2015, the Company had received cash of $36.0 million and had aggregate receivables of $32.0 million, of which $28.3 million was classified as “Receivable from sale of interest in Fabrix Systems Ltd.” and $3.7 million was included in “Other assets” in the accompanying consolidated balance sheet. The Company and the other shareholders placed $13.0 million of the proceeds in escrow for the resolution of post-closing claims that may arise. Any unclaimed escrow balance will be released in two tranches over a period of 18 months. In the three months ended January 31, 2015, the Company recorded gain on the sale of its interest in Fabrix of $0.5 million, which represented the Company’s share of working capital and other adjustments. In the six months ended January 31, 2015, the Company recorded a gain on the sale of its interest in Fabrix of $75.6 million.
	Fabrix’ income (loss) before income taxes and income (loss) before income taxes attributable to the Company, which is included in the accompanying consolidated statements of income, were as follows:
		Three Months Ended					Six Months Ended
		January 31,					January 31,
		2015		2014			2015		2014
		(in thousands)
	(Loss) income before income taxes	$	—	$	(993	)	$	917	$	(1,676	)
	(Loss) income before income taxes attributable to IDT Corporation	$	—	$	(878	)	$	1,325	$	(1,482	)

Marketable_Securities

Marketable Securities	6 Months Ended
	Jan. 31, 2015
Marketable Securities [Abstract]
Marketable Securities	Note 3—Marketable Securities
	The following is a summary of marketable securities:
		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
		(in thousands)
	Available-for-sale securities:
	January 31, 2015:
	Certificates of deposit*	$	12,394	$	—	$	—		$	12,394
	Municipal bonds		6,640		8		(1	)		6,647
	Total	$	19,034	$	8	$	(1	)	$	19,041
	July 31, 2014:
	Certificates of deposit*	$	10,375	$	—	$	—		$	10,375
	Equity securities		31		—		(9	)		22
	Municipal bonds		2,475		1		—			2,476
	Total	$	12,881	$	1	$	(9	)	$	12,873
	* Each of the Company’s certificates of deposit has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.
	Proceeds from maturities and sales of available-for-sale securities were $5.3 million and $4.0 million in the three months ended January 31, 2015 and 2014, respectively, and $12.1 million and $10.1 million in the six months ended January 31, 2015 and 2014, respectively. The gross realized losses that were included in earnings as a result of sales were $14,000 and nil in the three months ended January 31, 2015 and 2014, respectively, and $54,000 and nil in the six months ended January 31, 2015 and 2014, respectively. The Company uses the specific identification method in computing the gross realized gains and gross realized losses on the sales of marketable securities.
	The contractual maturities of the Company’s available-for-sale debt securities at January 31, 2015 were as follows:
		Fair Value
		(in thousands)
	Within one year	$	15,920
	After one year through five years		3,121
	After five years through ten years		—
	After ten years		—
	Total	$	19,041
	The following available-for-sale securities were in an unrealized loss position for which other-than-temporary impairments have not been recognized:
		Unrealized Losses		Fair Value
		(in thousands)
	January 31, 2015:
	Municipal bonds	$	1	$	1,230
	July 31, 2014:
	Equity securities	$	9	$	22
	At January 31, 2015 and July 31, 2014, there were no securities in a continuous unrealized loss position for 12 months or longer.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jan. 31, 2015
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 4—Fair Value Measurements
	The following tables present the balance of assets measured at fair value on a recurring basis:
		Level 1 (1)		Level 2 (2)		Level 3 (3)		Total
		(in thousands)
	January 31, 2015:
	Available-for-sale securities	$	—	$	19,041	$	—	$	19,041
	July 31, 2014:
	Available-for-sale securities	$	—	$	12,873	$	—	$	12,873
	(1) – quoted prices in active markets for identical assets or liabilities
	(2) – observable inputs other than quoted prices in active markets for identical assets and liabilities
	(3) – no observable pricing inputs in the market
	At January 31, 2015 and July 31, 2014, the Company did not have any liabilities measured at fair value on a recurring basis.
	At January 31, 2015 and July 31, 2014, the Company had $10.9 million and $9.5 million, respectively, in investments in hedge funds, of which less than $0.1 million and $0.1 million, respectively, were included in “Other current assets” and $10.9 million and $9.4 million, respectively, were included in “Investments” in the accompanying consolidated balance sheets. The Company’s investments in hedge funds are accounted for using the equity method or the cost method; therefore investments in hedge funds are not measured at fair value.
	Fair Value of Other Financial Instruments
	The estimated fair value of the Company’s other financial instruments was determined using available market information or other appropriate valuation methodologies. However, considerable judgment is required in interpreting these data to develop estimates of fair value. Consequently, the estimates are not necessarily indicative of the amounts that could be realized or would be paid in a current market exchange.
	Cash and cash equivalents, restricted cash and cash equivalents—short-term, other current assets, revolving credit loan payable, customer deposits, notes payable—current portion and other current liabilities. At January 31, 2015 and July 31, 2014, the carrying amount of these assets and liabilities approximated fair value because of the short period of time to maturity. The fair value estimates for cash, cash equivalents and restricted cash and cash equivalents—short-term were classified as Level 1 and other current assets, revolving credit loan payable, customer deposits, notes payable—current portion and other current liabilities were classified as Level 2 of the fair value hierarchy.
	Restricted cash and cash equivalents—long-term. At July 31, 2014, the carrying amount of restricted cash and cash equivalents—long-term approximated fair value. The fair value was estimated based on the anticipated cash flows once the restrictions are removed, which was classified as Level 2 of the fair value hierarchy.
	Other assets, Notes payable—long-term portion and other liabilities. At January 31, 2015 and July 31, 2014, the carrying amount of these assets and liabilities approximated fair value. The fair values were estimated based on the Company’s assumptions, which were classified as Level 3 of the fair value hierarchy.
	The Company’s investments at January 31, 2015 and July 31, 2014 included investments in the equity of certain privately held entities and other investments that are accounted for at cost. It is not practicable to estimate the fair value of these investments because of the lack of a quoted market price for the shares of these entities, and the inability to estimate their fair value without incurring excessive cost. The carrying value of these investments was $1.6 million and $1.8 million at January 31, 2015 and July 31, 2014, respectively, which the Company believes was not impaired.

Equity

Equity	6 Months Ended
	Jan. 31, 2015
Equity [Abstract]
Equity	Note 5—Equity
	Changes in the components of equity were as follows:
		Six Months Ended
		31-Jan-15
		Attributable to IDT Corporation			Noncontrolling Interests			Total
		(in thousands)
	Balance, July 31, 2014	$	100,239		$	925		$	101,164
	Dividends declared ($1.67 per share)		(38,891	)		—			(38,891	)
	Restricted Class B common stock purchased from employees		(279	)		—			(279	)
	Repurchases of Class B common stock through repurchase program		(424	)		—			(424	)
	Exercise of stock options.		2,896			—			2,896
	Stock issued for matching contributions to the 401(k) Plan		134			—			134
	Other		—			9			9
	Sale of interest in Fabrix Systems Ltd.		102			538			640
	Distributions to noncontrolling interests		—			(750	)		(750	)
	Stock-based compensation		3,438			62			3,500
	Comprehensive income:
	Net income		82,666			445			83,111
	Other comprehensive loss		(3,962	)		—			(3,962	)
	Comprehensive income		78,704			445			79,149
	Balance, January 31, 2015	$	145,919		$	1,229		$	147,148
	Dividend Payments
	In the six months ended January 31, 2015, the Company paid aggregate cash dividends of $1.67 per share on its Class A common stock and Class B common stock, or $38.9 million in total. The aggregate cash dividends included special dividends of $0.68 per share and $0.64 per share paid in November 2014 and January 2015, respectively. In March 2015, the Company’s Board of Directors declared a dividend of $0.18 per share for the second quarter of fiscal 2015 to holders of the Company’s Class A common stock and Class B common stock. The dividend will be paid on or about March 27, 2015 to stockholders of record as of the close of business on March 20, 2015.
	Stock Repurchase Program
	The Company has a stock repurchase program that authorized the repurchase of up to an aggregate of 8.3 million shares of the Company’s Class B common stock. In the six months ended January 31, 2015, the Company repurchased 29,675 shares of Class B common stock for an aggregate purchase price of $0.4 million. There were no repurchases under the program in the six months ended January 31, 2014. As of January 31, 2015, 5.0 million shares remained available for repurchase under the stock repurchase program.
	Restricted Stock
	On March 11, 2015, the Compensation Committee of the Company’s Board of Directors approved an equity grant of 0.3 million restricted shares of the Company’s Class B common stock to its employees, including executive officers. The shares are expected to vest 50% in January 2017 and 50% in July 2018.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jan. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Note 6—Earnings Per Share
	Basic earnings per share is computed by dividing net income attributable to all classes of common stockholders of the Company by the weighted average number of shares of all classes of common stock outstanding during the applicable period. Diluted earnings per share is computed in the same manner as basic earnings per share, except that the number of shares is increased to include restricted stock still subject to risk of forfeiture and to assume exercise of potentially dilutive stock options using the treasury stock method, unless the effect of such increase is anti-dilutive.
	The weighted-average number of shares used in the calculation of basic and diluted earnings per share attributable to the Company’s common stockholders consists of the following:
		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Basic weighted-average number of shares		22,818		21,572		22,783		21,305
	Effect of dilutive securities:
	Stock options		52		132		40		109
	Non-vested restricted Class B common stock		355		1,039		332		1,413
	Diluted weighted-average number of shares		23,225		22,743		23,155		22,827
	The following outstanding stock options were excluded from the calculation of diluted earnings per share because the exercise price of the stock option was greater than the average market price of the Company’s stock during the period:
		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Shares excluded from the calculation of diluted earnings per share		16		16		16		42

Revolving_Credit_Loan_Payable

Revolving Credit Loan Payable	6 Months Ended
	Jan. 31, 2015
Revolving Credit Loan Payable [Abstract]
Revolving Credit Loan Payable	Note 7—Revolving Credit Loan Payable
	The Company’s subsidiary, IDT Telecom, Inc., entered into a credit agreement, dated July 12, 2012, with TD Bank, N.A. for a line of credit facility for up to a maximum principal amount of $25.0 million. IDT Telecom may use the proceeds to finance working capital requirements, acquisitions and for other general corporate purposes. The line of credit facility is secured by primarily all of IDT Telecom’s assets. The principal outstanding bears interest per annum, at the option of IDT Telecom, at either (a) the U.S. Prime Rate less 125 basis points, or (b) the LIBOR rate adjusted by the Regulation D maximum reserve requirement plus 150 basis points. Interest is payable monthly and all outstanding principal and any accrued and unpaid interest is due on the maturity date of January 31, 2017. At January 31, 2015 and July 31, 2014, there was nil and $13.0 million, respectively, outstanding under the facility. The principal outstanding at July 31, 2014 incurred interest at a rate of 1.65% per annum. In August 2014, IDT Telecom repaid the $13.0 million loan payable. The Company intends to continue to borrow under the facility from time to time. IDT Telecom pays a quarterly unused commitment fee of 0.375% per annum on the average daily balance of the unused portion of the $25.0 million commitment. IDT Telecom is required to comply with various affirmative and negative covenants as well as maintain certain financial targets and ratios during the term of the line of credit, including IDT Telecom may not pay any dividend on its capital stock and IDT Telecom’s aggregate loans and advances to affiliates or subsidiaries may not exceed $90.0 million. At January 31, 2015 and July 31, 2014, there were no amounts utilized for letters of credit under the line of credit, IDT Telecom was in compliance with all of the covenants, and IDT Telecom’s aggregate loans and advances to affiliates and subsidiaries was $88.0 million and $73.7 million, respectively.

Severance_Expense

Severance Expense	6 Months Ended
	Jan. 31, 2015
Severance Expense [Abstract]
Severance Expense	Note 8—Severance Expense
	Severance expense of $0.4 million and $1.9 million in the three and six months ended January 31, 2015, respectively, was due to a downsizing of certain IDT Telecom sales and administrative functions in Europe and the U.S. Approximately 20 employees were terminated in the six months ended January 31, 2015 as a result of the downsizing. At January 31, 2015, there was accrued severance of $0.5 million for this downsizing included in “Accrued expenses” in the accompanying consolidated balance sheet.
	In February and March 2015, the Company completed a reduction of approximately 7% of its global compensation costs. The cost-cutting initiative is expected to reduce the Company’s current selling, general and administrative expense run rate by approximately $10 million per year. As a result of this reduction in headcount, the Company expects to incur severance expense of approximately $6.6 million in the third quarter of fiscal 2015.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	6 Months Ended
	Jan. 31, 2015
Accumulated Other Comprehensive Income Loss [Abstract]
Accumulated Other Comprehensive Income	Note 9—Accumulated Other Comprehensive Income
	The accumulated balances for each classification of other comprehensive income (loss) were as follows:
		Unrealized Gain (Loss) on Available-			Foreign			Accumulated
		for-Sale Securities			Currency			Other
					Translation			Comprehensive
								Income
		(in thousands)
	Balance, July 31, 2014	$	(8	)	$	3,676		$	3,668
	Sale of interest in Fabrix Systems Ltd.		—			102			102
	Other comprehensive income (loss) attributable to IDT Corporation		15			(3,977	)		(3,962	)
	Balance, January 31, 2015	$	7		$	(199	)	$	(192	)

Business_Segment_Information

Business Segment Information	6 Months Ended
	Jan. 31, 2015
Business Segment Information [Abstract]
Business Segment Information	Note 10—Business Segment Information
	The Company has two reportable business segments, Telecom Platform Services and Consumer Phone Services. Operating segments that are not reportable individually are included in All Other. The Company’s reportable segments are distinguished by types of service, customers and methods used to provide their services. The operating results of these business segments are regularly reviewed by the Company’s chief operating decision maker.
	The Telecom Platform Services segment provides retail telecommunications and payment offerings as well as wholesale international long distance traffic termination. The Consumer Phone Services segment provides consumer local and long distance services in certain U.S. states. Telecom Platform Services and Consumer Phone Services comprise the IDT Telecom division. Beginning in the three months ended January 31, 2015, All Other includes Zedge Holdings, Inc. (“Zedge”), which owns and operates a platform for mobile phone consumers interested in obtaining free, high quality games, apps, and mobile phone customization including ringtones, wallpapers, and notification sounds. Comparative results have been reclassified and restated as if Zedge was included in All Other in all periods presented. All Other also includes the Company’s real estate holdings and other, smaller, businesses. Until the sale of Fabrix in October 2014, All Other also included Fabrix, a software development company offering a cloud-based scale-out storage and computing platform optimized for big data, virtualization and media storage, processing and delivery. Corporate costs include certain services, such as compensation, consulting fees, treasury and accounts payable, tax and accounting services, human resources and payroll, corporate purchasing, corporate governance including Board of Directors’ fees, internal and external audit, investor relations, corporate insurance, corporate legal, business development, and other corporate-related general and administrative expenses including, among others, facilities costs, charitable contributions and travel, as well as depreciation expense on corporate assets. Corporate does not generate any revenues, nor does it incur any direct cost of revenues.
	The accounting policies of the segments are the same as the accounting policies of the Company as a whole. The Company evaluates the performance of its business segments based primarily on income (loss) from operations. IDT Telecom depreciation and amortization are allocated to Telecom Platform Services and Consumer Phone Services because the related assets are not tracked separately by segment. There are no other significant asymmetrical allocations to segments.
	Operating results for the business segments of the Company are as follows:
	(in thousands)	Telecom		Consumer		All Other			Corporate			Total
		Platform		Phone
		Services		Services
	Three Months Ended January 31, 2015
	Revenues	$	388,970	$	2,243	$	2,960		$	—		$	394,173
	Income (loss) from operations		6,870		306		(602	)		(2,839	)		3,735
	Gain on sale of interest in Fabrix Systems Ltd.		—		—		484			—			484
	Three Months Ended January 31, 2014
	Revenues	$	398,103	$	2,850	$	5,470		$	—		$	406,423
	Income (loss) from operations		12,392		421		(1,333	)		(3,906	)		7,574
	Six Months Ended January 31, 2015
	Revenues	$	792,758	$	4,554	$	9,739		$	—		$	807,051
	Income (loss) from operations		12,540		662		75,936			(5,794	)		83,344
	Gain on sale of interest in Fabrix Systems Ltd.		—		—		75,629			—			75,629
	Six Months Ended January 31, 2014
	Revenues	$	810,922	$	5,866	$	10,305		$	—		$	827,093
	Income (loss) from operations		24,298		841		(1,799	)		(8,483	)		14,857

Legal_Proceedings

Legal Proceedings	6 Months Ended
	Jan. 31, 2015
Legal Proceedings and Commitments and Contingencies [Abstract]
Legal Proceedings	Note 11—Legal Proceedings
	On May 5, 2004, the Company filed a complaint in the Supreme Court of the State of New York, County of New York, seeking injunctive relief and damages against Tyco Group, S.A.R.L., Tyco Telecommunications (US) Inc. (f/k/a TyCom (US) Inc.), Tyco International, Ltd., Tyco International (US) Inc., and TyCom Ltd. (collectively “Tyco”). The Company alleged that Tyco breached a settlement agreement that it had entered into with the Company to resolve certain disputes and civil actions among the parties. The Company alleged that Tyco did not provide the Company, as required under the settlement agreement, free of charge and for the Company’s exclusive use, a 15-year indefeasible right to use four Wavelengths in Ring Configuration (as defined in the settlement agreement) (“Wavelengths”) on a global undersea fiber optic network that Tyco was deploying at that time. In June 2004, Tyco asserted several counterclaims against the Company, alleging that the Company breached the settlement agreement and is liable for damages for allegedly refusing to accept Tyco’s offer regarding the Wavelengths referenced in the settlement agreement and for making a public statement that Tyco failed to provide the Company with the use of its Wavelengths. On August 19, 2008, the Appellate Division of the State of New York, First Department, granted summary judgment in favor of Tyco dismissing the complaint and remanded the matter to the Supreme Court for further proceedings. On October 22, 2009, the New York Court of Appeals issued an Order denying the Company’s appeal and affirming the Appellate Division’s order. On or about November 17, 2009, the Company demanded that Tyco comply with its obligations under the settlement agreement. After further discussions and meetings between the parties regarding Tyco’s obligations under the settlement agreement, including its obligation to provide the use of the Wavelengths for fifteen years in a manner fully consistent with that described in the settlement agreement, the Company filed a complaint on November 24, 2010 in the Supreme Court of the State of New York, County of New York, against Tyco based upon the failure to comply with the obligations under the settlement agreement, to negotiate the terms of an indefeasible right to use the Wavelengths in good faith, and to provide the Company with the Wavelengths. The complaint alleges causes of action for breach of contract and breach of duty to negotiate in good faith. On January 6, 2011, Tyco filed a motion to dismiss the complaint, which was granted. On July 22, 2011, the Company filed a notice of appeal. After briefing was completed, oral argument was held on April 2, 2012. On December 27, 2012, the Appellate Division issued an opinion and order reversing the order of the Supreme Court that granted Tyco’s motion to dismiss the Company’s complaint. On April 30, 2013, Tyco filed a motion for reargument or, in the alternative, leave to appeal to the Court of Appeals, which the Company opposed. On February 8, 2013, Tyco filed an answer with a counterclaim. On May 21, 2013, the Appellate Division denied Tyco’s request for reargument but granted its request for leave to appeal to the Court of Appeals. On July 30, 2013, Tyco filed its opening brief, the Company filed its response brief on September 16, 2013, and Tyco filed its reply on October 11, 2013. Oral argument was held on April 29, 2014. On June 5, 2014, the Court issued its decision, and reversed the order of the Appellate Division, and ordered that the order of the Supreme Court should be reinstated. On July 7, 2014, the Company filed a motion for reargument with the Court of Appeals, which Tyco opposed. On September 11, 2014, the Court denied the Company’s motion. The Company is evaluating its options going forward.
	In addition to the foregoing, the Company is subject to other legal and employment-related proceedings that have arisen in the ordinary course of business and have not been finally adjudicated. Although there can be no assurance in this regard, the Company believes that none of the other legal proceedings to which the Company is a party will have a material adverse effect on the Company’s results of operations, cash flows or financial condition.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jan. 31, 2015
Legal Proceedings and Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 12—Commitments and Contingencies
	Purchase Commitments
	The Company had purchase commitments of $5.5 million as of January 31, 2015, which includes commitments related to the renovations of the first four floors of the Company’s building located at 520 Broad Street, Newark, New Jersey.
	Letters of Credit
	As of January 31, 2015, the Company had letters of credit outstanding totaling $3.3 million for collateral to secure mortgage repayments and for IDT Telecom’s business. The letters of credit outstanding as of January 31, 2015 expire in the twelve month period ending January 31, 2016.
	Performance Bonds
	IDT Payment Services and IDT Telecom have performance bonds issued through third parties for the benefit of various states in order to comply with the states’ financial requirements for money remittance licenses and telecommunications resellers, respectively. At January 31, 2015, the Company had aggregate performance bonds of $11.0 million outstanding.
	Customer Deposits
	As of January 31, 2015 and July 31, 2014, “Customer deposits” in the Company’s consolidated balance sheets included refundable customer deposits of $64.6 million and $62.7 million, respectively, related to IDT Financial Services Ltd., the Company’s Gibraltar-based bank.
	Substantially Restricted Cash and Cash Equivalents
	The Company treats unrestricted cash and cash equivalents held by IDT Payment Services and IDT Financial Services Ltd. as substantially restricted and unavailable for other purposes. At January 31, 2015 and July 31, 2014, “Cash and cash equivalents” in the Company’s consolidated balance sheets included an aggregate of $15.5 million and $12.9 million, respectively, held by IDT Payment Services and IDT Financial Services Ltd. that was unavailable for other purposes.
	Restricted Cash and Cash Equivalents
	Restricted cash and cash equivalents consist of the following:
		January 31,			July 31,
		2015			2014
		(in thousands)
	Restricted cash and cash equivalents-short-term
	Related to letters of credit	$	3,206		$	665
	IDT Financial Services customer deposits		65,745			64,415
	Other		246			626
	Total short-term		69,197			65,706
	Restricted cash and cash equivalents-long-term
	Related to letters of credit		—			2,763
	Total restricted cash and cash equivalents	$	69,197		$	68,469
	Estimated Liability to Straight Path Communications Inc.
	On July 31, 2013, the Company completed a pro rata distribution of the common stock of the Company’s subsidiary, Straight Path Communications Inc. (“Straight Path”), to the Company’s stockholders (the “Straight Path Spin-Off”). The Company entered into various agreements with Straight Path prior to the Straight Path Spin-Off including a Separation and Distribution Agreement to effect the separation and provide a framework for the Company’s relationship with Straight Path after the spin-off. The Separation and Distribution Agreement includes that the Company is obligated to reimburse Straight Path for the payment of any liabilities of Straight Path arising or related to the period prior to the Straight Path Spin-Off. The following table summarizes the change in the balance of the Company’s estimated liability to Straight Path, which is included in “Other current liabilities” in the accompanying consolidated balance sheet:
		Six Months Ended
		31-Jan-15
		(in thousands)
	Balance, beginning of period	$	1,860
	Additional liability		1,532
	Adjustments		(540	)
	Payments		(1,136	)
	Balance, end of period	$	1,716

Other_Operating_Gains_Net

Other Operating Gains, Net	6 Months Ended
	Jan. 31, 2015
Other Income and Expenses [Abstract]
Other Operating Gains, Net	Note 13—Other Operating Gains, Net
	The following table summarizes the other operating gains, net by business segment:
		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Telecom Platform Services-gain related to legal matters	$	—	$	350	$	—	$	650
	All Other-gain on insurance claim (a)		—		—		—		571
	All Other-other		—		—		—		67
	Corporate-loss related to settlement (b)		—		—		—		(79	)
	Total	$	—	$	350	$	—	$	1,209
	(a) In the six months ended January 31, 2014, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company’s building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.
	(b) In the six months ended January 31, 2014, the Company incurred a loss of $0.1 million in connection with the June 2013 settlement of outstanding claims and disputes with the former Chief Executive Officer of Straight Path Spectrum, Inc. and his related parties.

Other_Income_Expense_Net

Other Income (Expense), Net	6 Months Ended
	Jan. 31, 2015
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Note 14—Other Income (Expense), Net
	Other income (expense), net consists of the following:
		Three Months Ended						Six Months Ended
		January 31,						January 31,
		2015			2014			2015			2014
		(in thousands)
	Foreign currency transaction gains (losses)	$	322		$	(3,157	)	$	1,089		$	(4,362	)
	(Loss) gain on investments		(455	)		117			1,402			853
	Other		1,100			(25	)		(201	)		(105	)
	Total other income (expense), net	$	967		$	(3,065	)	$	2,290		$	(3,614	)

Recently_Issued_Accounting_Sta

Recently Issued Accounting Standard Not Yet Adopted	6 Months Ended
	Jan. 31, 2015
Recently Issued Accounting Standard Not Yet Adopted [Abstract]
Recently Issued Accounting Standard Not Yet Adopted	Note 15—Recently Issued Accounting Standard Not Yet Adopted
	In May 2014, the Financial Accounting Standards Board and the International Accounting Standards Board jointly issued a comprehensive new revenue recognition standard that will supersede most of the current revenue recognition guidance under U.S. GAAP and International Financial Reporting Standards (“IFRS”). The goals of the revenue recognition project were to clarify and converge the revenue recognition principles under U.S. GAAP and IFRS and to develop guidance that would streamline and enhance revenue recognition requirements. The Company will adopt this standard on August 1, 2017. Entities have the option of using either a full retrospective or modified retrospective approach for the adoption of the standard. The Company is evaluating the impact that the standard will have on its consolidated financial statements.

Sale_of_Interest_in_Fabrix_Sys1

Sale of Interest in Fabrix Systems Ltd. (Tables)	6 Months Ended
	Jan. 31, 2015
Sale of Interest in Fabrix Systems Ltd. [Abstract]
Schedule of consolidated statements of income		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	(Loss) income before income taxes	$	—	$	-993	$	917	$	-1,676
	(Loss) income before income taxes attributable to IDT Corporation	$	—	$	-878	$	1,325	$	-1,482

Marketable_Securities_Tables

Marketable Securities (Tables)	6 Months Ended
	Jan. 31, 2015
Marketable Securities [Abstract]
Summary of marketable securities		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
		(in thousands)
	Available-for-sale securities:
	January 31, 2015:
	Certificates of deposit*	$	12,394	$	—	$	—		$	12,394
	Municipal bonds		6,640		8		(1	)		6,647
	Total	$	19,034	$	8	$	(1	)	$	19,041
	July 31, 2014:
	Certificates of deposit*	$	10,375	$	—	$	—		$	10,375
	Equity securities		31		—		(9	)		22
	Municipal bonds		2,475		1		—			2,476
	Total	$	12,881	$	1	$	(9	)	$	12,873
	* Each of the Company’s certificates of deposit has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.
Summary of available-for-sale securities		Fair Value
		(in thousands)
	Within one year	$	15,920
	After one year through five years		3,121
	After five years through ten years		—
	After ten years		—
	Total	$	19,041
Summary of available-for-sale securities, unrealized loss position		Unrealized Losses		Fair Value
		(in thousands)
	January 31, 2015:
	Municipal bonds	$	1	$	1,230
	July 31, 2014:
	Equity securities	$	9	$	22

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jan. 31, 2015
Fair Value Measurements [Abstract]
Summary of Assets Measured at Fair Value on Recurring Basis		Level 1 (1)		Level 2 (2)		Level 3 (3)		Total
		(in thousands)
	January 31, 2015:
	Available-for-sale securities	$	—	$	19,041	$	—	$	19,041
	July 31, 2014:
	Available-for-sale securities	$	—	$	12,873	$	—	$	12,873
	(1) – quoted prices in active markets for identical assets or liabilities
	(2) – observable inputs other than quoted prices in active markets for identical assets and liabilities
	(3) – no observable pricing inputs in the market

Equity_Tables

Equity (Tables)	6 Months Ended
	Jan. 31, 2015
Equity [Abstract]
Summary of Changes in the Components of Equity		Six Months Ended
		31-Jan-15
		Attributable to IDT Corporation			Noncontrolling Interests			Total
		(in thousands)
	Balance, July 31, 2014	$	100,239		$	925		$	101,164
	Dividends declared ($1.67 per share)		(38,891	)		—			(38,891	)
	Restricted Class B common stock purchased from employees		(279	)		—			(279	)
	Repurchases of Class B common stock through repurchase program		(424	)		—			(424	)
	Exercise of stock options.		2,896			—			2,896
	Stock issued for matching contributions to the 401(k) Plan		134			—			134
	Other		—			9			9
	Sale of interest in Fabrix Systems Ltd.		102			538			640
	Distributions to noncontrolling interests		—			(750	)		(750	)
	Stock-based compensation		3,438			62			3,500
	Comprehensive income:
	Net income		82,666			445			83,111
	Other comprehensive loss		(3,962	)		—			(3,962	)
	Comprehensive income		78,704			445			79,149
	Balance, January 31, 2015	$	145,919		$	1,229		$	147,148

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jan. 31, 2015
Earnings Per Share [Abstract]
Summary of Weighted-Average Number of Shares Used in the Calculation of Basic and Diluted Earnings Per Share		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Basic weighted-average number of shares		22,818		21,572		22,783		21,305
	Effect of dilutive securities:
	Stock options		52		132		40		109
	Non-vested restricted Class B common stock		355		1,039		332		1,413
	Diluted weighted-average number of shares		23,225		22,743		23,155		22,827
Shares Excluded from the Diluted Earnings Per Share Computations		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Shares excluded from the calculation of diluted earnings per share		16		16		16		42

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jan. 31, 2015
Accumulated Other Comprehensive Income Loss [Abstract]
Schedule of accumulated balances for each classification of other comprehensive income (loss)		Unrealized Gain (Loss) on Available-			Foreign			Accumulated
		for-Sale Securities			Currency			Other
					Translation			Comprehensive
								Income
		(in thousands)
	Balance, July 31, 2014	$	(8	)	$	3,676		$	3,668
	Sale of interest in Fabrix Systems Ltd.		—			102			102
	Other comprehensive income (loss) attributable to IDT Corporation		15			(3,977	)		(3,962	)
	Balance, January 31, 2015	$	7		$	(199	)	$	(192	)

Business_Segment_Information_T

Business Segment Information (Tables)	6 Months Ended
	Jan. 31, 2015
Business Segment Information [Abstract]
Summary of Operating Results of Business Segments	(in thousands)	Telecom		Consumer		All Other			Corporate			Total
		Platform		Phone
		Services		Services
	Three Months Ended January 31, 2015
	Revenues	$	388,970	$	2,243	$	2,960		$	—		$	394,173
	Income (loss) from operations		6,870		306		(602	)		(2,839	)		3,735
	Gain on sale of interest in Fabrix Systems Ltd.		—		—		484			—			484
	Three Months Ended January 31, 2014
	Revenues	$	398,103	$	2,850	$	5,470		$	—		$	406,423
	Income (loss) from operations		12,392		421		(1,333	)		(3,906	)		7,574
	Six Months Ended January 31, 2015
	Revenues	$	792,758	$	4,554	$	9,739		$	—		$	807,051
	Income (loss) from operations		12,540		662		75,936			(5,794	)		83,344
	Gain on sale of interest in Fabrix Systems Ltd.		—		—		75,629			—			75,629
	Six Months Ended January 31, 2014
	Revenues	$	810,922	$	5,866	$	10,305		$	—		$	827,093
	Income (loss) from operations		24,298		841		(1,799	)		(8,483	)		14,857

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jan. 31, 2015
Legal Proceedings and Commitments and Contingencies [Abstract]
Restricted Cash and Cash Equivalents		January 31,			July 31,
		2015			2014
		(in thousands)
	Restricted cash and cash equivalents-short-term
	Related to letters of credit	$	3,206		$	665
	IDT Financial Services customer deposits		65,745			64,415
	Other		246			626
	Total short-term		69,197			65,706
	Restricted cash and cash equivalents-long-term
	Related to letters of credit		—			2,763
	Total restricted cash and cash equivalents	$	69,197		$	68,469
Other Current Liabilities
		Six Months Ended
		31-Jan-15
		(in thousands)
	Balance, beginning of period	$	1,860
	Additional liability		1,532
	Adjustments		(540	)
	Payments		(1,136	)
	Balance, end of period	$	1,716

Other_Operating_Gains_Net_Tabl

Other Operating Gains, Net (Tables)	6 Months Ended
	Jan. 31, 2015
Other Income and Expenses [Abstract]
Schedule of Other Operating Gains Net
		Three Months Ended				Six Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
		(in thousands)
	Telecom Platform Services-gain related to legal matters	$	—	$	350	$	—	$	650
	All Other-gain on insurance claim (a)		—		—		—		571
	All Other-other		—		—		—		67
	Corporate-loss related to settlement (b)		—		—		—		(79	)
	Total	$	—	$	350	$	—	$	1,209
	(a) In the six months ended January 31, 2014, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company’s building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.
	(b) In the six months ended January 31, 2014, the Company incurred a loss of $0.1 million in connection with the June 2013 settlement of outstanding claims and disputes with the former Chief Executive Officer of Straight Path Spectrum, Inc. and his related parties.

Other_Income_Expense_Net_Table

Other Income (Expense), Net (Tables)	6 Months Ended
	Jan. 31, 2015
Other Income and Expenses [Abstract]
Schedule of Other Income (Expense), Net		Three Months Ended						Six Months Ended
		January 31,						January 31,
		2015			2014			2015			2014
		(in thousands)
	Foreign currency transaction gains (losses)	$	322		$	(3,157	)	$	1,089		$	(4,362	)
	(Loss) gain on investments		(455	)		117			1,402			853
	Other		1,100			(25	)		(201	)		(105	)
	Total other income (expense), net	$	967		$	(3,065	)	$	2,290		$	(3,614	)

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	6 Months Ended		1 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jul. 31, 2013
Basis of Presentation (Textual)
Restricted cash and cash equivalents	$7,912	$19,077
Reclassification [Member]
Basis of Presentation (Textual)
Restricted cash and cash equivalents			$4,600

Sale_of_Interest_in_Fabrix_Sys2

Sale of Interest in Fabrix Systems Ltd. (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income before income	$4,662	$4,614	$85,503	$11,323
Attributable to IDT Corporation [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income before income		-878	1,325	-1,482
Fabrix Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income before income		($993)	$917	($1,676)

Sale_of_Interest_in_Fabrix_Sys3

Sale of Interest in Fabrix Systems Ltd. (Details Textual) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Oct. 08, 2014	Jul. 31, 2014
Sale of Interest in Fabrix Systems Ltd (Textual)
Receivable from sale of interest in Fabrix Systems Ltd.	$28,290		$28,290
Gain on sale of interest in Fabrix Systems Ltd.	484		75,629
Cash received from divestiture of interest in consolidated subsidiaries parent only portion			36,039
Fabrix Subsidiary [Member]
Sale of Interest in Fabrix Systems Ltd (Textual)
Common stock sold to Ericsson					95,000
Sale of stock to Ericsson in percentage					100.00%
Company owns in Fabrix in percentage					78.00%
Escrow deposit					13,000
Unclaimed escrow balance					18 months
Gain on sale of interest in Fabrix Systems Ltd.			500		75,600
Proceeds from divestiture of interest in consolidated subsidiaries					68,000
Cash received from divestiture of interest in consolidated subsidiaries parent only portion			36,000
Other receivables	32,000		32,000
Other assets	$3,700		$3,700

Marketable_Securities_Details

Marketable Securities (Details) (USD $)	Jan. 31, 2015		Jul. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$19,034		$12,881
Gross Unrealized Gains	8		1
Gross Unrealized Losses	-1		-9
Fair Value	19,041		12,873
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,394	[1]	10,375	[1]
Gross Unrealized Gains		[1]		[1]
Gross Unrealized Losses		[1]		[1]
Fair Value	12,394	[1]	10,375	[1]
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost			31
Gross Unrealized Gains
Gross Unrealized Losses			-9
Fair Value			22
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,640		2,475
Gross Unrealized Gains	8		1
Gross Unrealized Losses	-1
Fair Value	$6,647		$2,476
[1]	Each of the Company's certificates of deposit has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.

Marketable_Securities_Details_

Marketable Securities (Details 1) (USD $)	Jan. 31, 2015
In Thousands, unless otherwise specified
Marketable Securities [Abstract]
Within one year	$15,920
After one year through five years	3,121
After five years through ten years
After ten years
Total	$19,041

Marketable_Securities_Details_1

Marketable Securities (Details 2) (USD $)	Jul. 31, 2014	Jan. 31, 2015
In Thousands, unless otherwise specified
Equity Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Unrealized Losses	$9
Fair Value	22
Municipal Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Unrealized Losses		1
Fair Value		$1,230

Marketable_Securities_Details_2

Marketable Securities (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Jul. 31, 2014
Marketable Securities [Abstract]
Proceeds from maturities of available-for-sale securities	$5,300,000	$4,000,000	$12,100,000	$10,100,000
Realized gains from sales of available-for-sale securities	0	0	0	0
Realized losses from sales of available-for-sale securities	14,000		54,000
Unrealized losses, less than twelve months or longer

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Jan. 31, 2015		Jul. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$19,041		$12,873
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	19,041		12,873
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		[1]		[1]
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	19,041	[2]	12,873	[2]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		[3]		[3]
[1]	quoted prices in active markets for identical assets or liabilities
[2]	observable inputs other than quoted prices in active markets for identical assets and liabilities
[3]	no observable pricing inputs in the market

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details Textual) (USD $)	Jan. 31, 2015	Jul. 31, 2014
In Millions, unless otherwise specified
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	$10.90	$9.50
Carrying value of investments	1.6	1.8
Long-term Investments [Member]
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	10.9	9.4
Other Current Assets [Member]
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	$0.10	$0.10

Equity_Details

Equity (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Changes in the components of equity
Beginning Balance			$101,164
Dividends declared ($1.67 per share)			-38,891
Restricted Class B common stock purchased from employees			-279
Repurchases of Class B common stock through repurchase program			-424
Exercise of stock options			2,896
Stock issued for matching contributions to the 401(k) Plan			134
Other			9
Sale of interest in Fabrix Systems Ltd.			640
Distributions to noncontrolling interests			-750
Stock-based compensation			3,500
Comprehensive income:
Net income	2,757	2,973	83,111	7,023
Other comprehensive loss	-2,111	518	-3,962	1,182
Comprehensive income	646	3,491	79,149	8,205
Ending Balance	147,148		147,148
Attributable to IDT Corporation [Member]
Changes in the components of equity
Beginning Balance			100,239
Dividends declared ($1.67 per share)			-38,891
Restricted Class B common stock purchased from employees			-279
Repurchases of Class B common stock through repurchase program			-424
Exercise of stock options			2,896
Stock issued for matching contributions to the 401(k) Plan			134
Other
Sale of interest in Fabrix Systems Ltd.			102
Distributions to noncontrolling interests
Stock-based compensation			3,438
Comprehensive income:
Net income			82,666
Other comprehensive loss			-3,962
Comprehensive income			78,704
Ending Balance	145,919		145,919
Noncontrolling Interests [Member]
Changes in the components of equity
Beginning Balance			925
Dividends declared ($1.67 per share)
Restricted Class B common stock purchased from employees
Repurchases of Class B common stock through repurchase program
Exercise of stock options
Stock issued for matching contributions to the 401(k) Plan
Other			9
Sale of interest in Fabrix Systems Ltd.			538
Distributions to noncontrolling interests			-750
Stock-based compensation			62
Comprehensive income:
Net income			445
Other comprehensive loss
Comprehensive income			445
Ending Balance	$1,229		$1,229

Equity_Details_Textual

Equity (Details Textual) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended		0 Months Ended
In Millions, except Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Nov. 30, 2014	Mar. 31, 2015	Mar. 11, 2015
Equity (Textual)
Dividends paid			$38.90
Dividend paid per share	$0.82	$0.17	$1.67	$0.17
Board of Directors [Member]
Equity (Textual)
Common stock dividends paid					$0.64	$0.68
Class A common stock [Member]
Equity (Textual)
Dividends paid
Class A common stock [Member] | Subsequent Event [Member]
Equity (Textual)
Dividend per share declared							$0.18
Date of declared dividend to be paid							27-Mar-15
Record date of declared dividend							20-Mar-15
Class B common stock [Member]
Equity (Textual)
Dividends paid
Class B common stock shares repurchased			29,675
Aggregate purchase price of shares repurchased			$0.40
Stock repurchase program, remaining number of shares authorized to be repurchased	5,000,000		5,000,000		5,000,000
Class B common stock [Member] | Stock Repurchase Program [Member]
Equity (Textual)
Stock repurchase program, shares authorized for repurchase	8,300,000		8,300,000		8,300,000
Class B common stock [Member] | Subsequent Event [Member]
Equity (Textual)
Dividend per share declared							$0.18
Date of declared dividend to be paid							27-Mar-15
Record date of declared dividend							20-Mar-15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period								300,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights								The shares are expected to vest 50% in January 2017 and 50% in July 2018.

Earnings_Per_Share_Details

Earnings Per Share (Details)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Weighted-average number of shares used in the calculation of basic and diluted earnings per share
Basic weighted-average number of shares	22,818	21,572	22,783	21,305
Effect of dilutive securities:
Stock options	52	132	40	109
Non-vested restricted Class B common stock	355	1,039	332	1,413
Diluted weighted-average number of shares	23,225	22,743	23,155	22,827

Earnings_Per_Share_Details_1

Earnings Per Share (Details 1)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Shares excluded from the diluted earnings per share computations
Shares excluded from the calculation of diluted earnings per share	16	16	16	42

Revolving_Credit_Loan_Payable_

Revolving Credit Loan Payable (Details) (USD $)	0 Months Ended	1 Months Ended	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jul. 12, 2012	Aug. 31, 2014	Jan. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Maximum principal amount of credit agreement	$25,000
Line of credit maturity date			31-Jan-17
Line of credit facility, outstanding				13,000
Average percentage of commitment fee per annum	0.38%
Maximum amount of investments in and advances to affiliates, at fair value	90,000
Repayments of credit agreement		13,000
Aggregate loans and advances to affiliates and subsidiaries			88,000	73,700
Line of credit utilized for letters of credit outstanding amount			0	0
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, outstanding				$13,000
Interest rate of credit agreement				1.65%
July 30, 2012 [Member]
Debt Instrument [Line Items]
Interest rate description			Interest per annum, at the option of IDT Telecom, at either (a) the U.S. Prime Rate less 125 basis points, or (b) the LIBOR rate adjusted by the Regulation D maximum reserve requirement plus 150 basis points.
Prime Rate [Member]
Debt Instrument [Line Items]
U.S Prime Rate basis points	125

Severance_Expense_Details

Severance Expense (Details) (USD $)	3 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2015	Mar. 31, 2015	Apr. 30, 2015
		Employees
Severance Expense Textual [Abstract]
Severance expense	$351	$1,899
Accrued severance	500	500
Number of employees terminated		20
Subsequent Event [Member]
Severance Expense Textual [Abstract]
Severance expense				6,600
Global compensation costs interest rate			7.00%
Selling, general and administrative expense			$10,000

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$3,668
Sale of interest in Fabrix Systems Ltd.	640
Ending balance	-192
Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	-8
Sale of interest in Fabrix Systems Ltd.
Other comprehensive income attributable to IDT Corporation	15
Ending balance	7
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	3,676
Sale of interest in Fabrix Systems Ltd.	102
Other comprehensive income attributable to IDT Corporation	-3,977
Ending balance	-199
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	3,668
Sale of interest in Fabrix Systems Ltd.	102
Other comprehensive income attributable to IDT Corporation	-3,962
Ending balance	($192)

Business_Segment_Information_D

Business Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$394,173	$406,423	$807,051	$827,093
Income (loss) from operations	3,735	7,574	83,344	14,857
Gain on sale of interest in Fabrix Systems Ltd.	484		75,629
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
Revenues	388,970	398,103	792,758	810,922
Income (loss) from operations	6,870	12,392	12,540	24,298
Gain on sale of interest in Fabrix Systems Ltd.
Operating Segments [Member] | Consumer Phone Services [Member]
Segment Reporting Information [Line Items]
Revenues	2,243	2,850	4,554	5,866
Income (loss) from operations	306	421	662	841
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	2,960	5,470	9,739	10,305
Income (loss) from operations	-602	-1,333	75,936	-1,799
Gain on sale of interest in Fabrix Systems Ltd.	484		75,629
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income (loss) from operations	-2,839	-3,906	-5,794	-8,483
Gain on sale of interest in Fabrix Systems Ltd.

Business_Segment_Information_D1

Business Segment Information (Details Textual)	6 Months Ended
	Jan. 31, 2015
	Segment
Segment Reporting Information [Line Items]
Number of reportable segments	2

Legal_Proceedings_Details

Legal Proceedings (Details)	0 Months Ended
	5-May-04
Legal Proceedings (Textual)
Term of indefeasible right to use	15 years

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	Jan. 31, 2015	Jul. 31, 2014
In Thousands, unless otherwise specified
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents-short-term	$69,197	$65,706
Restricted cash and cash equivalents-long-term		2,763
Total restricted cash and cash equivalents	69,197	68,469
Restricted cash and cash equivalents-short-term [Member] | Related to letters of credit [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents-short-term	3,206	665
Restricted cash and cash equivalents-short-term [Member] | IDT Financial Services customer deposits [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents-short-term	65,745	64,415
Restricted cash and cash equivalents-short-term [Member] | Other [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents-short-term	$246	$626

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 1) (Straight Path [Member], USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015
Straight Path [Member]
Schedule of changes in company estimated liability
Balance, beginning of period	$1,860
Additional liability	1,532
Adjustments	-540
Payments	-1,136
Balance, end of period	$1,716

Commitments_and_Contingencies_3

Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jul. 31, 2014
Commitments and Contingencies (Textual)
Purchase commitment of company	$5,500
Letters of credit outstanding	3,300
Letters of credit expiration date	31-Jan-16
Performance bonds outstanding	11,000
Refundable customer deposits	64,555	62,685
IDT Payment Services and IDT Financial Services [Member]
Commitments and Contingencies (Textual)
Restricted cash and cash equivalents	$15,500	$12,900

Other_Operating_Gains_Net_Deta

Other Operating Gains, Net (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015		Jan. 31, 2014		Jan. 31, 2015		Jan. 31, 2014
Other Operating Gains, Net [Abstract]
Telecom Platform Services-gain related to legal matters			$350				$650
All Other-gain on insurance claim (a)		[1]		[1]		[1]	571	[1]
All Other-other							67
Corporate-loss related to settlement (b)		[2]		[2]		[2]	-79	[2]
Total			$350				$1,209
[1]	In the six months ended January 31, 2014, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company's building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.
[2]	In the six months ended January 31, 2014, the Company incurred a loss of $0.1 million in connection with the June 2013 settlement of outstanding claims and disputes with the former Chief Executive Officer of Straight Path Spectrum, Inc. and his related parties.

Other_Operating_Gains_Net_Deta1

Other Operating Gains, Net (Details Textual) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Other Operating Gains, Net (Textual)
Proceeds from insurance		$571
Gain on insurance claim		600
New Jersey [Member]
Other Operating Gains, Net (Textual)
Proceeds from insurance		600
Former Chief Executive Officer of Straight Path Spectrum, Inc [Member]
Other Operating Gains, Net (Textual)
Loss on settlement of outstanding claims and disputes		($100)

Other_Income_Expense_Net_Detai

Other Income (Expense), Net (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Other Income and Expenses [Abstract]
Foreign currency transaction gains (losses)	$322	($3,157)	$1,089	($4,362)
(Loss) gain on investments	-455	117	1,402	853
Other	1,100	-25	-201	-105
Total other income (expense), net	$967	($3,065)	$2,290	($3,614)