Genie Energy (GNE) 10-K 17 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 28, 2013	Mar. 10, 2014	Mar. 10, 2014
			Class A common stock	Class B common stock
Entity Registrant Name	'Genie Energy Ltd.	'	'	'
Entity Central Index Key	'0001528356	'	'	'
Amendment Flag	'false	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'
Document Type	'10-K	'	'	'
Document Period End Date	31-Dec-13	'	'	'
Document Fiscal Year Focus	'2013	'	'	'
Document Fiscal Period Focus	'FY	'	'	'
Entity Filer Category	'Non-accelerated Filer	'	'	'
Entity Well-known Seasoned Issuer	'No	'	'	'
Entity Voluntary Filers	'No	'	'	'
Entity Current Reporting Status	'Yes	'	'	'
Entity Public Float	'	$145,000,000	'	'
Entity Common Stock, Shares Outstanding	'	'	1,574,326	19,765,182

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$73,885	$69,409
Restricted cash-short-term	14,429	10,841
Certificates of deposit	4,343	2,205
Marketable securities	'	10,485
Trade accounts receivable, net of allowance for doubtful accounts of $930 at December 31, 2013 and $130 at December 31, 2013 and 2012	42,926	40,932
Inventory	3,344	2,644
Prepaid expenses	3,408	3,315
Deferred income tax assets, net	840	599
Other current assets	2,917	771
TOTAL CURRENT ASSETS	146,092	141,201
Property and equipment, net	561	409
Goodwill	7,349	3,663
Restricted cash-long-term	1,127	2
Other assets	3,714	5,031
TOTAL ASSETS	158,843	150,306
CURRENT LIABILITIES:	'	'
Trade accounts payable	25,302	20,641
Accrued expenses	9,856	7,832
Advances from customers	1,103	1,472
Income taxes payable	2,075	1,244
Dividend payable	'	211
Due to IDT Corporation	541	600
Other current liabilities	1,457	209
TOTAL CURRENT LIABILITIES	40,334	32,209
Other liabilities	2,169	'
TOTAL LIABILITIES	42,503	32,209
Commitments and contingencies	'	'
Genie Energy Ltd. Stockholders' equity:	'	'
Preferred stock, $.01 par value; authorized shares - 10,000:Series 2012-A, designated shares - 8,750; at liquidation preference, consisting of 1,917 and 1,605 shares issued and outstanding at December 31, 2013 and 2012, respectively	16,303	13,639
Additional paid-in capital	82,791	80,196
Treasury stock, at cost, consisting of 59 and 27 shares of Class B common at December 31, 2013 and 2012, respectively	-473	-204
Accumulated other comprehensive income	745	270
Retained earnings	21,552	28,375
Total Genie Energy Ltd. Stockholders' equity	121,132	122,490
Noncontrolling interests:	'	'
Noncontrolling interests	-3,792	-3,393
Receivable for issuance of equity	-1,000	-1,000
Total noncontrolling interests	-4,792	-4,393
TOTAL EQUITY	116,340	118,097
TOTAL LIABILITIES AND EQUITY	158,843	150,306
Class A common stock	'	'
Genie Energy Ltd. Stockholders' equity:	'	'
Common stock, value	16	16
Noncontrolling interests:	'	'
TOTAL EQUITY	16	16
Class B common stock	'	'
Genie Energy Ltd. Stockholders' equity:	'	'
Common stock, value	198	198
Noncontrolling interests:	'	'
TOTAL EQUITY	$198	$198

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified				Series 2012-A Preferred Stock	Series 2012-A Preferred Stock	Class A common stock	Class A common stock	Class B common stock	Class B common stock
Treasury stock, shares	'	'	'	'	'	'	'	59	27
Designated shares	'	'	'	8,750	8,750	'	'	'	'
Common stock, par value (In dollars per share)	'	'	'	'	'	$0.10	$0.10	$0.10	$0.10
Common stock, shares authorized	'	'	'	'	'	35,000	35,000	200,000	200,000
Common stock, shares issued	'	'	'	'	'	1,574	1,574	19,755	19,827
Common stock, shares outstanding	'	'	'	'	'	1,574	1,574	19,696	19,800
Allowance for doubtful accounts, trade accounts receivable (in dollars)	$930	$130	$130	'	'	'	'	'	'
Preferred stock, par value (In dollars per share)	$0.01	$0.01	'	'	'	'	'	'	'
Preferred stock, shares authorized	10,000	10,000	'	'	'	'	'	'	'
Preferred stock, shares issued	'	'	1,605	1,917	1,605	'	'	'	'
Preferred stock, shares outstanding	'	'	'	1,917	1,605	'	'	'	'

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	5 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Statements of Operations [Abstract]	'	'	'	'	'
REVENUES	$76,783	$74,877	$279,174	$229,459	$196,018
Direct cost of revenues	52,476	53,422	213,416	159,872	142,171
GROSS PROFIT	24,307	21,455	65,758	69,587	53,847
OPERATING EXPENSES AND LOSSES:	'	'	'	'	'
Selling, general and administrative (i)	17,836	11,196	49,749	54,000	33,792
Bad debt	'	'	800	'	'
Research and development	2,648	3,045	11,389	9,365	7,843
Equity in the net loss of AMSO, LLC	2,095	1,658	3,194	3,175	5,238
Income from operations	1,728	5,556	626	3,047	6,974
Interest income	44	53	449	404	92
Financing fees	-969	-852	-3,217	-2,913	-2,061
Other (expense) income, net	-455	340	-444	-143	-615
(Loss) income before income taxes	348	5,097	-2,586	395	4,390
Provision for income taxes	-616	-4,181	-2,755	-2,930	-6,945
NET (LOSS) INCOME	-268	916	-5,341	-2,535	-2,555
Net (income) loss attributable to noncontrolling interests	1,115	815	-562	-746	4,185
NET (LOSS) INCOME ATTRIBUTABLE TO GENIE ENERGY LTD.	847	1,731	-5,903	-3,281	1,630
Dividends on preferred stock	'	'	-1,223	-211	'
NET (LOSS) INCOME ATTRIBUTABLE TO GENIE ENERGY LTD. COMMON STOCKHOLDERS	847	1,731	-7,126	-3,492	1,630
(Loss) earnings per share attributable to Genie Energy Ltd. common stockholders:	'	'	'	'	'
Basic	$0.04	$0.09	($0.36)	($0.17)	$0.08
Diluted	$0.04	$0.08	($0.36)	($0.17)	$0.07
Weighted-average number of shares used in calculation of (loss) earnings per share	'	'	'	'	'
Basic	20,366	20,365	19,668	20,687	20,365
Diluted	22,497	22,342	19,668	20,687	22,342
(i) Stock-based compensation included in selling, general and administrative expenses	$630	$800	$4,180	$3,429	$751

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Parenthetical) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Statements of Operations [Abstract]	'	'	'	'	'
(i) Stock-based compensation included in selling, general and administrative expenses	$630	$800	$4,180	$3,429	$751

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive (Loss) Income (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Statements Of Comprehensive (Loss) Income [Abstract]	'	'	'	'	'
NET (LOSS) INCOME	($268)	$916	($5,341)	($2,535)	($2,555)
Other comprehensive income (loss):	'	'	'	'	'
Change in unrealized loss on available-for-sale securities, net of tax	'	'	15	-15	'
Foreign currency translation adjustments	-613	-632	441	386	492
Other comprehensive income (loss)	-613	-632	456	371	492
COMPREHENSIVE (LOSS) INCOME	-881	284	-4,885	-2,164	-2,063
Comprehensive (income) loss attributable to noncontrolling interests	1,234	836	-543	-710	4,074
COMPREHENSIVE (LOSS) INCOME ATTRIBUTABLE TO GENIE ENERGY LTD.	$353	$1,120	($5,428)	($2,874)	$2,011

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Stock Class A	Common Stock Class B	Preferred Stock	Additional paid-in capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest	Receivable for issuance of equity
In Thousands, except Share data
Beginning Balance at Jul. 31, 2010	$34,236	$16	$211	'	'	'	($24)	$33,595	$438	'
Beginning Balance, Shares at Jul. 31, 2010	'	1,574	21,109	'	'	'	'	'	'	'
Stock-based compensation	710	'	'	'	710	'	'	'	'	'
Stock-based compensation, Shares	'	'	'	'	'	'	'	'	'	'
Sales of stock of subsidiary	10,000	'	'	'	11,200	'	'	'	-200	-1,000
Shares exchange between subsidiaries	-1,302	'	'	'	-333	'	'	'	-969	'
Distributions to noncontrolling interests	'	'	'	'	'	'	'	'	'	'
Other comprehensive (loss) income	492	'	'	'	'	'	381	'	111	'
Net income (loss)	-2,555	'	'	'	'	'	'	1,630	-4,185	'
Ending Balance at Jul. 31, 2011	41,581	16	211	'	11,577	'	357	35,225	-4,805	-1,000
Ending Balance, Shares at Jul. 31, 2011	'	1,574	21,109	'	'	'	'	'	'	'
Dividends declared	-1,148	'	'	'	'	'	'	-1,148	'	'
Dividends on preferred stock	'	'	'	'	'	'	'	'	'	'
Stock-based compensation	671	'	3	'	668	'	'	'	'	'
Stock-based compensation, Shares	'	'	238	'	'	'	'	'	'	'
Other, Shares	'	'	35	'	'	'	'	'	'	'
Capital contribution from IDT Corporation in connection with the spin-off	82,183	'	'	'	82,183	'	'	'	'	'
Forgiveness of amount due from IDT Corporation	-2,107	'	'	'	-2,107	'	'	'	'	'
Distributions to noncontrolling interests	'	'	'	'	'	'	'	'	'	'
Other comprehensive (loss) income	-613	'	'	'	'	'	-494	'	-119	'
Net income (loss)	-268	'	'	'	'	'	'	847	-1,115	'
Ending Balance at Dec. 31, 2011	120,299	16	214	'	92,321	'	-137	34,924	-6,039	-1,000
Ending Balance, Shares at Dec. 31, 2011	'	1,574	21,382	'	'	'	'	'	'	'
Dividends declared	-3,057	'	'	'	'	'	'	-3,057	'	'
Dividends on preferred stock	-211	'	'	'	'	'	'	-211	'	'
Restricted Class B common stock purchased from employees	-204	'	'	'	'	-204	'	'	'	'
Stock-based compensation	3,429	'	'	'	3,404	'	'	'	25	'
Capital contribution from IDT Corporation in connection with the spin-off	'	'	'	'	'	'	'	'	'	'
Restricted stock issued to employees and directors, Shares	'	'	49	'	'	'	'	'	'	'
Exercise of stock options	5	'	'	'	5	'	'	'	'	'
Exercise of stock options, Shares	'	'	1	'	'	'	'	'	'	'
Grants of equity of subsidiaries	'	'	'	'	-1,911	'	'	'	1,911	'
Exchange of Class B common stock for Preferred stock	'	'	-16	13,639	-13,623	'	'	'	'	'
Exchange of Class B common stock for Preferred stock, Shares	'	'	-1,605	1,605	'	'	'	'	'	'
Distributions to noncontrolling interests	'	'	'	'	'	'	'	'	'	'
Other comprehensive (loss) income	371	'	'	'	'	'	407	'	-36	'
Net income (loss)	-2,535	'	'	'	'	'	'	-3,281	746	'
Ending Balance at Dec. 31, 2012	118,097	16	198	13,639	80,196	-204	270	28,375	-3,393	-1,000
Ending Balance, Shares at Dec. 31, 2012	'	1,574	19,827	1,605	'	'	'	'	'	'
Dividends on preferred stock	-920	'	'	'	'	'	'	-920	'	'
Restricted Class B common stock purchased from employees	-269	'	'	'	'	-269	'	'	'	'
Stock-based compensation	3,841	'	'	'	3,841	'	'	'	'	'
Sales of stock of subsidiary	422	'	'	'	1,129	'	'	'	-707	'
Capital contribution from IDT Corporation in connection with the spin-off	'	'	'	'	'	'	'	'	'	'
Restricted stock issued to employees and directors	3	'	3	'	'	'	'	'	'	'
Restricted stock issued to employees and directors, Shares	'	'	227	'	'	'	'	'	'	'
Exercise of stock options	93	'	'	'	93	'	'	'	'	'
Exercise of stock options, Shares	'	'	13	'	'	'	'	'	'	'
Grants of equity of subsidiaries	'	'	'	'	357	'	'	'	-357	'
Exchange of Class B common stock for Preferred stock	'	'	-3	2,664	-2,661	'	'	'	'	'
Exchange of Class B common stock for Preferred stock, Shares	'	'	-312	312	'	'	'	'	'	'
Issuance of Class B common stock to holders of deferred stock units of subsidiary	'	'	'	'	1,836	'	'	'	-1,836	'
Issuance of preferred stock of subsidiary	'	'	'	'	-2,000	'	'	'	2,000	'
Distributions to noncontrolling interests	-42	'	'	'	'	'	'	'	-42	'
Other comprehensive (loss) income	456	'	'	'	'	'	475	'	-19	'
Net income (loss)	-5,341	'	'	'	'	'	'	-5,903	562	'
Ending Balance at Dec. 31, 2013	$116,340	$16	$198	$16,303	$82,791	($473)	$745	$21,552	($3,792)	($1,000)
Ending Balance, Shares at Dec. 31, 2013	'	1,574	19,755	1,917	'	'	'	'	'	'

Consolidated_Statements_of_Equ1

Consolidated Statements of Equity (Parenthetical) (USD $)	5 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012
Statements of Equity [Abstract]	'	'
Dividends declared per common share	$0.05	$0.13

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
OPERATING ACTIVITIES	'	'	'	'	'
Net (loss) income	($268)	$916	($5,341)	($2,535)	($2,555)
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:	'	'	'	'	'
Depreciation	15	11	110	124	24
Deferred income taxes	-1,253	-183	-241	4,508	-684
Provision for doubtful accounts receivable	'	66	800	'	66
Stock-based compensation	630	800	4,180	3,429	751
Loss on disposal of property	'	'	37	'	'
Equity in the net loss of AMSO, LLC	2,095	1,658	3,194	3,175	5,238
Change in assets and liabilities, net of effect of acquisitions:	'	'	'	'	'
Restricted cash	'	'	-4,713	-233	'
Trade accounts receivable	1,276	676	-2,679	-14,711	1,007
Inventory	-1,311	-816	-700	1,423	-61
Prepaid expenses	-1,795	-914	-93	638	-1,095
Other current assets and other assets	-2,675	-312	-243	-783	156
Trade accounts payable, accrued expenses and other current liabilities	-1,595	-1,518	6,883	6,275	3,953
Advances from customers	806	558	-746	-781	-370
Due to IDT Corporation	757	'	-59	-157	'
Income taxes payable	961	-806	831	-1,380	-954
Net cash provided by (used in) operating activities	-2,357	136	1,220	-1,008	5,476
INVESTING ACTIVITIES	'	'	'	'	'
Capital expenditures	-134	-45	-313	-91	-151
Capital contributions to AMSO, LLC	-2,040	-2,514	-2,700	-4,102	-3,943
Payment for acquisitions, net of cash acquired	'	'	-772	'	'
(Increase) decrease in restricted cash	-428	-37	'	'	309
Issuance of notes receivable	'	'	-750	-650	'
Purchase of licenses and security deposits	'	'	'	-175	'
Purchases of certificates of deposit	'	'	-4,329	-2,205	'
Proceeds from maturities of certificates of deposit	'	'	2,205	'	'
Purchases of marketable securities	'	'	-3	-11,484	'
Proceeds from maturities of marketable securities	'	'	10,433	966	'
Net cash provided by (used in) investing activities	-2,602	-2,596	3,771	-17,741	-3,785
FINANCING ACTIVITIES	'	'	'	'	'
Capital contribution from IDT Corporation in connection with the spin-off	82,183	'	'	'	'
Dividends paid	'	'	-1,131	-4,205	'
Funding provided by IDT Corporation	1,120	10,098	'	'	571
Distributions to noncontrolling interests	'	'	-42	'	'
Proceeds from sales of equity of subsidiaries	'	10,000	422	'	10,000
Repurchase of noncontrolling interests	'	'	'	'	-1,528
Proceeds from exercise of stock options	'	'	93	5	'
Increase in restricted cash	'	'	'	-10,017	'
Repurchases of common stock and Class B common stock	'	'	-269	-204	'
Net cash (used in) provided by financing activities	83,303	20,098	-927	-14,421	9,043
Effect of exchange rate changes on cash and cash equivalents	'	'	412	359	'
Net increase (decrease) in cash and cash equivalents	78,344	17,638	4,476	-32,811	10,734
Cash and cash equivalents at beginning of period	23,876	13,142	69,409	102,220	13,142
Cash and cash equivalents at end of period	102,220	30,780	73,885	69,409	23,876
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION	'	'	'	'	'
Cash payments made for interest	394	4	12	'	5
Cash payments made for income taxes	'	1,935	2,069	387	3,337
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING ACTIVITIES	'	'	'	'	'
Liabilities incurred for acquisitions	'	'	2,475	'	'
Forgiveness of amount due from IDT Corporation	2,107	'	'	'	'
Receivable for issuance of equity of subsidiary	'	$1,000	'	'	$1,000

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2013

Description of Business and Summary of Significant Accounting Policies [Abstract]

'

Description of Business and Summary of Significant Accounting Policies

'

Note 1—Description of Business and Summary of Significant Accounting Policies

Description of Business

Genie Energy Ltd. (“Genie”), a Delaware corporation, was incorporated in January 2011. Genie owns 99.3% of its subsidiary, Genie Energy International Corporation (“GEIC”), which owns 100% of IDT Energy and 92% of Genie Oil and Gas, Inc. (“GOGAS”). IDT Energy has outstanding deferred stock units granted to directors and employees that represent an interest of 2.3% of the equity of IDT Energy. Genie’s principal businesses consist of the following:

•

IDT Energy, a retail energy provider (“REP”) supplying electricity and natural gas to residential and small business customers in the Northeastern United States; and

•

Genie Oil and Gas, which is pioneering technologies to produce clean and affordable transportation fuels from the world's abundant oil shales and other fuel resources, which consists of (1) American Shale Oil Corporation (“AMSO”), which holds and manages a 48.16% interest in American Shale Oil, L.L.C. (“AMSO, LLC”), the Company’s oil shale project in Colorado, (2) an 88.6% interest in Israel Energy Initiatives, Ltd. (“IEI”), the Company’s oil shale project in Israel, (3) an 89% interest in Afek Oil and Gas, Ltd. (formerly Genie Israel Oil and Gas, Ltd.) (“Afek”), the Company’s conventional oil and gas exploration project in the southern portion of the Golan Heights, and (4) a 90% interest in Genie Mongolia, the Company’s oil shale exploration project in Central Mongolia.

IEI holds an exclusive Shale Oil Exploration and Production License that was awarded by the Government of Israel in July 2008. The license covers an area in the south of the Shfela region in Israel. The license expires in July 2014. The license may be extended for one year through July 2015. In April 2013, the Government of Israel finalized the award to Afek of an exclusive three year petroleum exploration license in the southern portion of the Golan Heights. In April 2013, Genie Mongolia and the Petroleum Authority of Mongolia entered into an exclusive five year oil shale development agreement to explore and evaluate the commercial potential of oil shale resources in Central Mongolia.

The “Company” in these financial statements refers to Genie, IDT Energy and Genie Oil and Gas, and their respective subsidiaries,  on a consolidated basis as if Genie existed and owned its subsidiaries in all periods presented, or from the date an entity was acquired, if later.

On January 30, 2012, the Company’s Board of Directors changed the Company’s fiscal year end from July 31 to December 31, in order to better align the Company’s financial reporting with its operational and budgeting cycle and with other industry participants.

The Company’s Spin-Off

The Company was formerly a subsidiary of IDT Corporation (“IDT”). On October 28, 2011, the Company was spun-off by IDT and became an independent public company through a pro rata distribution of the Company’s common stock to IDT’s stockholders (the “Spin-Off”). As a result of the Spin-Off, each of IDT’s stockholders received: (i) one share of the Company’s Class A common stock for every share of IDT’s Class A common stock held of record on October 21, 2011 (the “Record Date”), and (ii) one share of the Company’s Class B common stock for every share of IDT’s Class B common stock held of record on the Record Date. On October 28, 2011, 1.6 million shares of the Company’s Class A common stock, and 21.1 million shares of the Company’s Class B common stock were issued and outstanding.

Prior to the Spin-Off, IDT made a capital contribution of $82.2 million to the Company. In addition, in connection with the capital contribution received from IDT, the amount due from IDT as of the date of the Spin-Off of $2.1 million was forgiven.

The Company entered into various agreements with IDT prior to the Spin-Off including a Separation and Distribution Agreement to effect the separation and provide a framework for the Company’s relationship with IDT after the Spin-Off, and a Transition Services Agreement, which provides for certain services to be performed by the Company and IDT to facilitate the Company’s transition into a separate publicly-traded company. These agreements provide for, among other things, (1) the allocation between the Company and IDT of employee benefits, taxes and other liabilities and obligations attributable to periods prior to the Spin-Off, (2) transitional services to be provided by IDT relating to human resources and employee benefits administration, (3) the allocation of responsibilities relating to employee compensation and benefit plans and programs and other related matters, (4) finance, accounting, tax, internal audit, facilities, investor relations and legal services to be provided by IDT to the Company following the Spin-Off and (5) specified administrative services to be provided by the Company to certain of IDT’s foreign subsidiaries.

In addition, the Company entered into a Tax Separation Agreement with IDT, which sets forth the responsibilities of the Company and IDT with respect to, among other things, liabilities for federal, state, local and foreign taxes for periods before and including the Spin-Off, the preparation and filing of tax returns for such periods and disputes with taxing authorities regarding taxes for such periods. Pursuant to the Tax Separation Agreement, among other things, IDT indemnifies the Company from all liability for taxes of IDT with respect to any taxable period, and the Company indemnifies IDT from all liability for taxes of the Company with respect to any taxable period, including, without limitation, the ongoing tax audits related to the Company’s business.

Basis of Accounting and Consolidation

For the periods prior to the Spin-Off, direct expenses historically incurred by IDT on behalf of the Company are reflected in these financial statements. The most significant expenses are as follows: Facility costs as well as certain salaries consisting of payroll, human resources, purchasing, accounts payable, treasury, network and telephone services, legal, travel, and consulting fees were allocated to the Company based on estimates of the incremental cost incurred by IDT. Medical and dental benefits were allocated to the Company based on rates similar to COBRA health benefit provision rates charged to former IDT employees. Stock-based compensation and retirement benefits under the defined contribution plan were allocated to the Company based on specific identification. Insurance was allocated to these entities based on a combination of headcount and specific policy identification. The assets and liabilities in these financial statements are recorded at historical cost. Management believes that the assumptions and methods of allocation used are reasonable. However, the costs as allocated are not necessarily indicative of the costs that would have been incurred if the Company operated on a stand-alone basis. Therefore, for the periods prior to the Spin-Off, the consolidated financial statements included herein may not necessarily be indicative of the results of operations, changes in equity and cash flows of the Company had the Company been a separate stand-alone entity during the periods prior to the Spin-Off.

The method of accounting applied to long-term investments, whether consolidated, equity or cost, involves an evaluation of the significant terms of each investment that explicitly grant or suggest evidence of control or influence over the operations of the investee and also includes the identification of any variable interests in which the Company is the primary beneficiary. The consolidated financial statements include the Company’s controlled subsidiaries and variable interest entities where the Company is the primary beneficiary (see Note 12). All significant intercompany accounts and transactions between the consolidated entities are eliminated.

Unaudited Financial Statements

The accompanying consolidated statements of operations, comprehensive income, and cash flows for the five months ended December 31, 2010 are unaudited. These unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). In management’s opinion, the unaudited consolidated financial statements have been prepared on the same basis as the audited financial statements and include all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s consolidated results of operations and cash flows for the five months ended December 31, 2010.

Accounting for Investments

Investments in businesses that the Company does not control, but in which the Company has the ability to exercise significant influence over operating and financial matters, are accounted for using the equity method. The Company’s investment in AMSO, LLC is accounted for using the equity method. The Company periodically evaluates its equity method investment for impairment due to declines considered to be other than temporary. If the Company determines that a decline in fair value is other than temporary, then a charge to earnings would be recorded, and a new basis in the investment is established.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimates.

Revenue Recognition

Revenues from IDT Energy’s sale of electricity and natural gas are recognized under the accrual method based on deliveries of electricity and natural gas to customers. Revenues from electricity and natural gas delivered but not yet billed are estimated and recorded as accounts receivable. Cash received in advance from customers under billing arrangement is reported as deferred revenue and is included in “Advances from customers” in the accompanying consolidated balance sheets. Genie Oil and Gas does not yet generate revenues.

Direct Cost of Revenues

Direct cost of revenues for IDT Energy consists primarily of the cost of natural gas and electricity sold, and also includes scheduling costs, Independent System Operator fees, pipeline costs and utility service charges. In addition, the changes in the fair value of IDT Energy’s futures contracts, swaps and put and call options are recorded in direct cost of revenues. Genie Oil and Gas does not yet incur direct cost of revenues as primarily all of its expenses are classified as research and development.

Research and Development Costs

Research and development costs are incurred primarily by IEI, Afek and Genie Mongolia. Costs for research and development are charged to expense as incurred.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Marketable Securities

The Company classified its investments in marketable securities as “available-for-sale.” Available-for-sale securities are required to be carried at their fair value, with unrealized gains and losses (net of income taxes) that are considered temporary in nature recorded in “Accumulated other comprehensive income” in the accompanying consolidated balance sheets. The Company uses the specific identification method in computing the gross realized gains and gross realized losses on the maturities and sales of marketable securities. The Company periodically evaluated its investments in marketable securities for impairment due to declines in market value considered to be other than temporary. Such impairment evaluations included, in addition to persistent, declining market prices, general economic and Company-specific evaluations. If the Company determined that a decline in market value is other than temporary, then a charge to operations is recorded in “Other (expense) income, net” in the accompanying consolidated statements of operations and a new cost basis in the investment is established.

Inventory

Inventory consists of natural gas, which is stored at various third parties’ underground storage facilities. Inventory is valued at a weighted average cost. The cost is based on the purchase price of the natural gas and the cost to transport, plus or minus injections or withdrawals.

Property and Equipment

Computer software and development, computers and computer hardware, laboratory equipment and office equipment and other are recorded at cost and are depreciated on a straight-line basis over their estimated useful lives, which range as follows: computer software and development—2, 3 or 5 years; computers and computer hardware—5 years, laboratory equipment 7 years, and office equipment and other —5 or 7 years. Leasehold improvements included in office equipment and other are recorded at cost and are depreciated on a straight-line basis over the term of their lease or their estimated useful lives, whichever is shorter.

Long-Lived Assets

The Company tests the recoverability of its long-lived assets with finite useful lives whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The Company tests the recoverability based on the projected undiscounted cash flows to be derived from such asset. If the projected undiscounted future cash flows are less than the carrying value of the asset, the Company will record an impairment loss based on the difference between the estimated fair value and the carrying value of the asset. The Company generally measures fair value by considering sale prices for similar assets or by discounting estimated future cash flows from such asset using an appropriate discount rate. Cash flow projections and fair value estimates require significant estimates and assumptions by management. Should the estimates and assumptions prove to be incorrect, the Company may be required to record impairments in future periods and such impairments could be material.

Goodwill and Indefinite Lived Intangible Assets

Goodwill is the excess of the acquisition cost of businesses over the fair value of the identifiable net assets acquired. Goodwill and other indefinite lived intangible assets are not amortized. These assets are reviewed annually (or more frequently under various conditions) for impairment using a fair value approach. The goodwill impairment assessment involves estimating the fair value of the reporting unit and comparing it to its carrying amount, which is known as Step 1. If the carrying value of the reporting unit exceeds its estimated fair value, Step 2 is performed to determine if an impairment of goodwill is required. The fair value of the reporting unit is estimated using discounted cash flow methodologies, as well as considering third party market value indicators. Goodwill impairment is measured by the excess of the carrying amount of the reporting unit’s goodwill over its implied fair value. Calculating the fair value of the reporting units, and allocating the estimated fair value to all of the tangible assets, intangible assets and liabilities, requires significant estimates and assumptions by management. Should the estimates and assumptions regarding the fair value of the reporting units prove to be incorrect, the Company may be required to record impairments to its goodwill in future periods and such impairments could be material.

The Company has the option to perform a qualitative assessment to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. However, the Company may elect to perform the two-step quantitative goodwill impairment test even if no indications of a potential impairment exist.

For the impairment test of the Company’s indefinite-lived intangible assets, a quantitative impairment test is only necessary if the Company determines that it is more likely than not that an indefinite-lived intangible asset is impaired based on an assessment of certain qualitative factors.

Derivative Instruments and Hedging Activities

The Company records its derivatives instruments at their respective fair values. The accounting for changes in the fair value (that is, gains or losses) of a derivative instrument is dependent upon whether the derivative has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship.

Due to the volatility of electricity and natural gas prices, IDT Energy enters into futures contracts, swaps and put and call options as hedges against unfavorable fluctuations in market prices of electricity and natural gas and to reduce exposure from price fluctuations. The futures contracts, swaps and put and call options are recorded at fair value as a current asset or liability and any changes in fair value are recorded in “Direct cost of revenues” in the consolidated statements of operations.

In addition to the above, IDT Energy utilizes forward physical delivery contracts for a portion of its purchases of electricity and natural gas, which are defined as commodity derivative contracts. Using the exemption available for qualifying contracts, IDT Energy applies the normal purchase and normal sale accounting treatment to its forward physical delivery contracts, thereby these contracts are not adjusted to fair value. Accordingly, IDT Energy recognizes revenue from customer sales, and the related direct cost of revenues at the contracted price, as electricity and natural gas is delivered to retail customers.

Repairs and Maintenance

The Company charges the cost of repairs and maintenance, including the cost of replacing minor items not constituting substantial betterment, to selling, general and administrative expenses as these costs are incurred.

Foreign Currency Translation

Assets and liabilities of foreign subsidiaries denominated in foreign currencies are translated to U.S. Dollars at end-of-period rates of exchange, and their monthly results of operations are translated to U.S. Dollars at the average rates of exchange for that month. Gains or losses resulting from such foreign currency translations are recorded in “Accumulated other comprehensive income” in the accompanying consolidated balance sheets. Foreign currency transaction gains and losses are reported in “Other (expense) income, net” in the accompanying consolidated statements of operations.

Advertising Expense

Cost of advertising and commissions for customer acquisitions are charged to selling, general and administrative expenses in the period in which it is incurred. Most of the advertisements are in print, over the radio, or direct mail. In the years ended December 31, 2013 and 2012, the year ended July 31, 2011, and the five months ended December 31, 2011 and 2010 (unaudited), advertising expense included in selling, general and administrative expense was $0.2 million, $0.8 million, $1.6 million, $0.3 million and $0.4 million, respectively.

Income Taxes

For the periods prior to the Spin-Off, the accompanying financial statements include provisions for federal, state and foreign income taxes on a separate tax return basis.

The Company recognizes deferred tax assets and liabilities for the future tax consequences attributable to temporary differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the period in which related temporary differences become deductible. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in its assessment of a valuation allowance. Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date of such change.

The Company uses a two-step approach for recognizing and measuring tax benefits taken or expected to be taken in a tax return. The Company determines whether it is more-likely-than-not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. In evaluating whether a tax position has met the more-likely-than-not recognition threshold, the Company presumes that the position will be examined by the appropriate taxing authority that has full knowledge of all relevant information. Tax positions that meet the more-likely-than-not recognition threshold are measured to determine the amount of tax benefit to recognize in the financial statements. The tax position is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Differences between tax positions taken in a tax return and amounts recognized in the financial statements will generally result in one or more of the following: an increase in a liability for income taxes payable, a reduction of an income tax refund receivable, a reduction in a deferred tax asset, or an increase in a deferred tax liability.

The Company classifies interest and penalties on income taxes as a component of income tax expense.

Contingencies

The Company accrues for loss contingencies when both (a) information available prior to issuance of the financial statements indicates that it is probable that a liability had been incurred at the date of the financial statements and (b) the amount of loss can reasonably be estimated. When the Company accrues for loss contingencies and the reasonable estimate of the loss is within a range, the Company records its best estimate within the range. When no amount within the range is a better estimate than any other amount, the Company accrues the minimum amount in the range. The Company discloses an estimated possible loss or a range of loss when it is at least reasonably possible that a loss may have been incurred.

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 determined 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 earnings per share for the periods prior to the Spin-Off were calculated as if the number of shares outstanding at the Spin-Off were outstanding during those periods.

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:

(in thousands)

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31,

ended

July 31,

ended

2013

2012

December 31,

2011

December 31,

2011

2010

(Unaudited)

Basic weighted-average number of shares

19,668

20,687

20,366

20,365

20,365

Effect of dilutive securities:

Non-vested restricted Class B common stock

—

—

2,131

1,977

1,977

Diluted weighted-average number of shares

19,668

20,687

22,497

22,342

22,342

The following shares were excluded from the diluted earnings per share computations because their inclusion would have been anti-dilutive:

(in thousands)

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31, 2012

ended

July 31,

ended

2013

December 31,

2011

December 31,

2011

2010

(Unaudited)

Stock options

3,443

457

—

—

—

Non-vested restricted Class B common stock

265

1,896

—

—

—

Shares excluded from the calculation of diluted earnings per share

3,708

2,353

—

—

—

The diluted loss per share equals basic loss per share in the years ended December 31, 2013 and 2012 because the Company had a net loss and the impact of the assumed exercise of stock options and vesting of restricted stock would have been anti-dilutive.

An entity affiliated with Lord (Jacob) Rothschild has a one-time option through November 12, 2017 to exchange its GOGAS shares for shares of the Company with equal fair value as determined by the parties (see Note 10). The number of shares issuable in such an exchange is not currently determinable. If this option is exercised, the shares issued by the Company may dilute the earnings per share in future periods.

An employee of the Company, pursuant to the terms of his employment agreement, has the option to exchange his equity interests in IEI, Afek, Genie Mongolia and any equity interest that he may acquire in other entities that the Company may create, for shares of the Company. Employees and directors of the Company that were previously granted restricted stock of IEI have the right to exchange the restricted stock of IEI, upon vesting of such shares, into shares of the Company’s Class B common stock. In addition, IDT Energy has the right to exchange the deferred stock units it previously granted to employees and directors of the Company, upon vesting of such units, into shares of the Company’s Class B common stock or to redeem the units for cash. These exchanges, if elected, would be based on the relative fair value of the shares exchanged. The number of shares of the Company’s stock issuable in an exchange is not currently determinable. If shares of the Company’s stock are issued upon such exchange, the Company’s earnings per share may be diluted in future periods.

Stock-Based Compensation

The Company recognizes compensation expense for grants of stock-based awards to its employees based on the estimated fair value on the grant date. Stock based awards granted to nonemployees are marked-to-market until the vesting of the award. Compensation cost for awards is recognized using the straight-line method over the vesting period. Stock-based compensation is included in selling, general and administrative expense.

Vulnerability Due to Certain Concentrations

Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash, cash equivalents, restricted cash, certificates of deposit and trade accounts receivable. The Company holds cash, cash equivalents, restricted cash and certificates of deposit at several major financial institutions, which may exceed FDIC insured limits. Historically, the Company has not experienced any losses due to such concentration of credit risk. The Company’s temporary cash investments policy is to limit the dollar amount of investments with any one financial institution and monitor the credit ratings of those institutions. While the Company may be exposed to credit losses due to the nonperformance of the holders of its deposits, the Company does not expect the settlement of these transactions to have a material effect on its results of operations, cash flows or financial condition.

IDT Energy reduces its credit risk by participating in purchase of receivable programs for a majority of its receivables. In addition to providing billing and collection services, utility companies purchase IDT Energy’s receivables and assume all credit risk without recourse to IDT Energy. IDT Energy’s primary credit risk is therefore nonpayment by the utility companies. Certain of the utility companies represent significant portions of the Company’s consolidated revenues and consolidated gross trade accounts receivable balance and such concentrations increase the Company’s risk associated with nonpayment by those utility companies.

The following table summarizes the percentage of consolidated revenues from customers by utility company that equal or exceed 10% of consolidated revenues in the period (no other single utility company accounted for more than 10% of consolidated revenues in any of the periods):

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31,

ended

July 31,

ended

2013

2012

December 31,

2011

December 31,

2011

2010

(Unaudited)

Con Edison

25

%

34

%

52

%

47

%

55

%

West Penn Power

11

%

na

na

na

na

National Grid USA

10

%

na

14

%

17

%

16

%

Penelec

10

%

na

na

na

na

National Grid dba Keyspan

na

na

na

10

%

na

na-less than 10% of consolidated revenue in the period

The following table summarizes the percentage of consolidated gross trade accounts receivable by utility company that equal or exceed 10% of consolidated gross trade accounts receivable at December 31, 2013 and 2012:

December 31

2013

2012

Con Edison

23

%

19

%

West Penn Power

13

%

na

Penelec

12

%

10

%

na-less than 10% of consolidated gross trade accounts receivable at December 31, 2013 or 2012

Allowance for Doubtful Accounts

The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The allowance is determined based on known troubled accounts, historical experience and other currently available evidence. Doubtful accounts are written-off upon final determination that the trade accounts will not be collected. The change in the allowance for doubtful accounts was as follows:

(in thousands)

Balance at

Additions

Deductions(1)

Balance at

beginning of

charged to

end of period

period

costs and

expenses

Year ended December 31, 2013

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

800

$

—

$

930

Year ended December 31, 2012

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

—

$

—

$

130

Five months ended December 31, 2011

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

—

$

—

$

130

Year ended July 31, 2011

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

170

$

66

$

(106

)

$

130

Five months ended December 31, 2010 (unaudited)

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

170

$

66

$

(106

)

$

130

(1) Uncollectible accounts written off.

Fair Value Measurements

Fair value of financial and non-financial assets and liabilities is defined as an exit price, which is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three-tier hierarchy for inputs used to measure fair value, which prioritizes the inputs to valuation techniques used to measure fair value, is as follows:

Level 1 –

quoted prices (unadjusted) in active markets for identical assets or liabilities.

Level 2 –

quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 –

unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value.

A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of the assets and liabilities being measured and their placement within the fair value hierarchy.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2013
Acquisitions [Abstract]	'
Acquisitions	'
	Note 2—Acquisitions
	In December 2013, IDT Energy acquired 100% of the outstanding membership interests of Diversegy, LLC (“Diversegy”), a retail energy advisory and brokerage company that serves commercial and industrial customers, and its network marketing channel subsidiary, Epiq Energy, LLC (“Epiq”), that provides independent representatives with the opportunity to build sales organizations and to profit from both residential and commercial energy. Operating results of the acquired entities from the date of acquisition, which were not significant, are included in the Company’s consolidated financial statements.
	The impact of the acquisition’s purchase price allocations on the Company’s consolidated balance sheet and the acquisition date fair value of the total consideration transferred follows:
	(in thousands)
	Trade accounts receivable		$	114
	Goodwill			3,686
	Trade accounts payable			(176	)
	Advances from customers			(377	)
	Net assets acquired		$	3,247
	Supplemental information:
	Cash paid		$	779
	Cash acquired			(7	)
	Cash paid, net of cash acquired			772
	Deferred cash payments to be paid by June 2015 (1)			1,225
	Contingent payments (1)			1,250
	Total consideration, net of cash acquired		$	3,247
		(1)	The deferred cash payments and the contingent payments are included in other current liabilities and other liabilities in the consolidated balance sheet as of December 31, 2013.
	The contingent payments include 100% of the gross profit from each closing customer contract during the remainder of the initial term of such contract and 100% of the gross profit from each post-closing customer contract during the initial term of such contract, plus 25% of the gross profit from the first renewal term of such contracts. A closing customer contract is generally a contract in effect at closing, and a post-closing customer contract is generally a contract that became effective within 60 days following the acquisition. The Company estimated the acquisition date fair value of the contingent payments based on historical gross profits, customer attrition and contract renewals.
	The goodwill resulting from the acquisitions is primarily attributable to the existing workforce of the acquired entities and synergies expected from the combination of IDT Energy with Diversegy’s portfolio of competitive energy products and Epiq’s network marketing platform. All of the goodwill is deductible for income tax purposes.
	All of the Company’s goodwill at December 31, 2013 and 2012 was attributable to the IDT Energy segment. The table below reconciles the change in the carrying amount of goodwill for the period from July 31, 2011 to December 31, 2013:
	(in thousands)
	Balance at July 31, 2011		$	3,663
	Change in carrying amount			—
	Balance at December 31, 2011			3,663
	Change in carrying amount			—
	Balance at December 31, 2012			3,663
	Acquisitions			3,686
	Balance at December 31, 2013		$	7,349
	The following table presents unaudited pro forma information of the Company as if the acquisition occurred as of the beginning of the periods:
	(in thousands)		Year ended			Year ended
			December 31,			December 31,
			2013			2012
	Revenues		$	280,121		$	229,936
	Net loss		$	(6,015	)	$	(3,282	)

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Measurements [Abstract]	'
Fair Value Measurements	'
	Note 3—Fair Value Measurements
	The following table presents the balance of assets and liabilities at December 31, 2013 measured at fair value on a recurring basis:
	(in thousands)	Level 1 (1)			Level 2 (2)		Level 3 (3)			Total
	Assets:
	Derivative contracts	$	390		$	1,230	$	62		$	1,682
	Liabilities:
	Derivative contracts	$	13		$	372	$	—		$	385
	The following table presents the balance of assets and liabilities at December 31, 2012 measured at fair value on a recurring basis:
	(in thousands)	Level 1 (1)			Level 2 (2)		Level 3 (3)			Total
	Assets:
	Corporate debt securities	$	925		$	9,560	$	—		$	10,485
	Derivative contracts		—			308		—			308
	Total	$	925		$	9,868	$	—		$	10,793
	Liabilities:
	Derivative contracts	$	—		$	152	$	—		$	152
	(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
	The Company’s derivative contracts consist of natural gas and electricity futures contracts and put and call options in which the underlying asset is a forward contract or swaps which are an agreement whereby a floating (or market or spot) price is exchanged for a fixed price over a specified period and are classified as either Level 1, Level 2 or Level 3. The Level 1 derivatives are valued using quoted prices in active markets for identical contracts. The Level 2 derivatives are valued using observable inputs based on quoted market prices in active markets for similar contracts. The fair value of the Level 3 derivatives was based on the value of the underlying contracts, estimated in conjunction with the counterparty and could not be corroborated by the market.
	The Company’s subsidiary, GOGAS, issued a stock option and warrants. The GOGAS stock option was issued in June 2011 and is exercisable until April 9, 2015 at an exercise price of $5.0 million. The GOGAS warrants were issued in November 2010 and expired on November 12, 2011. The Company’s subsidiary, GEIC, issued a stock option in April 2010 that was exchanged in June 2011 for the GOGAS stock option. At December 31, 2013, the fair value of the GOGAS stock option was nil. The GOGAS warrants, GOGAS stock option and GEIC stock option were classified as Level 3 in the five months ended December 31, 2011 and 2010 (unaudited) and the year ended July 31, 2011.
	The following tables summarize the change in the balance of the Company’s assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
	(in thousands)	Year ended			Year ended		Five Months			Year ended			Five Months
		December 31,			December 31,		ended			July 31,			ended
		2013			2012		December 31,			2011			December 31,
							2011						2010
													(Unaudited)
	Balance, beginning of period	$	—		$	—	$	—		$	—		$	—
	Total gains (losses) (realized or unrealized) included in earnings in “Direct cost of revenues”		(142	)
	Purchases, sales, issuances and settlements:
	Purchases		359			—		—			—			—
	Settlement		(155	)		—		—			—			—
	Balance, end of period	$	62		$	—	$	—		$	—		$	—
	The amount of total gains  for the period included in earnings in “Direct cost of revenues” attributable to the change in unrealized gains or losses relating to assets held at the end of the period	$	62		$	—	$	—		$	—		$	—
	The following tables summarize the change in the balance of the Company’s liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
	(in thousands)	Year ended			Year ended		Five Months			Year ended			Five Months
		December 31,			December 31,		ended			July 31,			ended
		2013			2012		December 31,			2011			December 31,
							2011						2010
													(Unaudited)
	Balance, beginning of period	$	—		$	—	$	(101	)	$	(200	)	$	(200	)
	Total gains (losses) (realized or unrealized):
	Included in earnings in “Direct cost of revenues”		—			—		—			—			—
	Included in earnings in “Other (expense) income, net”		—			—		60			(86	)		(280	)
	Included in earnings in “Selling, general and administrative expense”		—			—		41			(41	)		(500	)
	Purchases, sales, issuances and settlements:
	Settlement		—			—		—			226			—
	Balance, end of period	$	—		$	—	$	—		$	(101	)	$	(980	)
	The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses relating to liabilities still held at the end of the period:
	Included in earnings in “Direct cost of revenues”	$	—		$	—	$	—		$	—		$	—
	Included in earnings in “Other (expense) income, net”	$	—		$	—	$	60		$	—		$	(280	)
	Included in earnings in “Selling, general and administrative expense”	$	—		$	—	$	—		$	(41	)	$	(500
	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 this 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—short-term, certificates of deposit, prepaid expenses, other current assets, advances from customers, dividends payable, due to IDT Corporation and other current liabilities. At December 31, 2013 and 2012, the carrying amount of these assets and liabilities approximated fair value because of the short period to maturity. The fair value estimates for cash, cash equivalents and restricted cash—short-term were classified as Level 1 and certificates of deposit, prepaid expenses, other current assets, advances from customers, dividends payable, due to IDT Corporation and other current liabilities were classified as Level 2 of the fair value hierarchy.
	Restricted cash—long-term. At December 31, 2013 and 2012, the carrying amount of restricted cash—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 3 of the fair value hierarchy.
	Other assets and other liabilities. At December 31, 2013 and 2012, other assets included an aggregate of $0.9 million and $0.7 million, respectively, in notes receivable from employees. The carrying amounts of the notes receivable and other liabilities approximated fair value. The fair values of the notes receivable and other liabilities were estimated based on the Company’s assumptions, and were classified as Level 3 of the fair value hierarchy.

Derivative_Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2013
Derivative Instruments [Abstract]	'
Derivative Instruments	'
	Note 4—Derivative Instruments
	The primary risk managed by the Company using derivative instruments is commodity price risk, which is accounted for in accordance with ASC 815. Natural gas and electricity futures contracts, swaps and put and call options are entered into as hedges against unfavorable fluctuations in market prices of natural gas and electricity. The Company does not apply hedge accounting to these contracts and options, therefore the changes in fair value are recorded in earnings. By using derivative instruments to mitigate exposures to changes in commodity prices, the Company exposes itself to credit risk and market risk. Credit risk is the failure of the counterparty to perform under the terms of the derivative contract. When the fair value of a derivative contract is positive, the counterparty owes the Company, which creates credit risk. The Company minimizes the credit or repayment risk in derivative instruments by entering into transactions with high-quality counterparties, primarily BP Energy Company. At December 31, 2013 and 2012, IDT Energy’s contracts and options were traded on the New York Mercantile Exchange or were over-the-counter bilateral agreements with BP Energy Company.
	The summarized volume of IDT Energy’s outstanding contracts and options as of December 31, 2013 was as follows (MWh – Megawatt hour; Dth – Decatherm):
	Commodity		Settlement Dates		Volume
	Electricity		Jan-14		35,200 MWh
	Electricity		Feb-14		72,000 MWh
	Electricity		Jul-14		52,800 MWh
	Electricity		Aug-14		50,400 MWh
	Electricity		Sep-14		16,800 MWh
	Natural gas		Jan-14		625,000 Dth
	Natural gas		Feb-14		1,345,000 Dth
	Natural gas		Mar-14		225,000 Dth
	Natural gas		Jul-14		77,500 Dth
	The fair value of outstanding derivative instruments recorded as assets in the accompanying consolidated balance sheets were as follows:
	December 31			2013		2012
	(in thousands)
	Asset Derivatives	Balance Sheet Location
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current assets		$	1,682	$	308
	The fair value of outstanding derivative instruments recorded as liabilities in the accompanying consolidated balance sheets were as follows:
	December 31			2013		2012
	(in thousands)
	Liability Derivatives	Balance Sheet Location
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current liabilities		$	385	$	152
	The effects of derivative instruments on the consolidated statements of operations were as follows:
				Amount of Gain (Loss) Recognized on Derivatives
	(in thousands)			Year ended		Year ended			Five Months			Year ended			Five Months
				December 31,		December 31,			ended			July 31,			ended
				2013		2012			December 31,			2011			December 31,
									2011						2010
															(Unaudited)
		Location of Gain (Loss) Recognized on Derivatives
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Direct cost of revenues		$	1,177	$	(258	)	$	(1,326	)	$	151		$	104
	GOGAS warrants	Selling, general and administrative expense			—		—			41			(41	)		—
	GOGAS stock option	Other (expense) income, net			—		—			60			(86	)		—
	GEIC stock option	Other (expense) income, net			—		—			—			—			(280	)
	Total			$	1,177	$	(258	)	$	(1,225	)	$	24		$	(176	)
	On October 31, 2011, MF Global, the Company’s former clearing broker, filed for bankruptcy protection. On that date, IDT Energy held $1.65 million of cash on deposit with MF Global in support of hedging positions related to IDT Energy’s commodity supply. Assets held by MF Global were placed under the control of the court appointed bankruptcy trustee to be released as deemed appropriate. In November 2011, the Company transferred its hedging securities to an alternative clearing broker. In October 2011, the Company recognized a $0.45 million loss, relating to its cash deposit with MF Global, based on management’s best estimate of the unrecoverable amount. In November 2012, the Company received $0.6 million from a sale of the amount due from MF Global and recognized a gain of $0.3 million.

Marketable_Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Marketable Securities	'
	Note 5—Marketable Securities
	The following is a summary of marketable securities:
	(in thousands)	Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	Available-for-sale securities:
	December 31, 2013:
	Marketable securities	$	—	$	—	$	—		$	—
	December 31, 2012:
	Corporate debt securities	$	10,500	$	35	$	(50	)	$	10,485
	Proceeds from maturities of available-for-sale securities in the years ended December 31, 2013 and 2012 were $10.4 million and $1.0 million, respectively. There were no realized gains or losses from sales of available-for-sale securities in the years ended December 31, 2013 and 2012. The Company did not have any marketable securities in the five months ended December 31, 2011 and 2010 (unaudited) and the year ended July 31, 2011.
	The following available-for-sale securities were in an unrealized loss position for which other-than-temporary impairments had not been recognized:
	(in thousands)	Unrealized		Fair Value
		Losses
	December 31, 2012:
	Corporate debt securities	$	50	$	2,500
	At December 31, 2012, there were no securities in a continuous unrealized loss position for 12 months or longer.

Investment_in_American_Shale_O

Investment in American Shale Oil, LLC	12 Months Ended
	Dec. 31, 2013
Investment In American Shale Oil, Llc [Abstract]	'
Investment in American Shale Oil, LLC	'
	Note 6—Investment in American Shale Oil, LLC
	AMSO, LLC holds a research, develop and demonstration lease awarded by the U.S. Bureau of Land Management that covers an area of 160 acres in western Colorado (the “RD&D Lease”). The RD&D Lease runs for a ten-year period beginning on January 1, 2007, and is subject to an extension of up to five years if AMSO, LLC can demonstrate that a process leading to the production of commercial quantities of shale oil is diligently being pursued. If AMSO, LLC can demonstrate the economic and environmental viability of its technology, it will have the opportunity to submit a one-time payment pursuant to the applicable regulations and convert its RD&D Lease to a commercial lease on 5,120 acres, which overlap and are contiguous with the 160 acres in its RD&D Lease. (The acreage numbers that appear in this paragraph are unaudited).
	In March 2009, a subsidiary of TOTAL S.A. (“Total”) acquired a 50% interest in AMSO, LLC in exchange for cash paid to the Company of $3.2 million and Total’s commitment to fund the majority of AMSO, LLC’s research, development and demonstration expenditures as well as certain other funding commitments. Immediately prior to this transaction, all owners of equity interests in AMSO, LLC other than AMSO exchanged their ownership interest for a proportionate share of a 1% override on AMSO, LLC’s future revenue. Following the transaction with Total, AMSO and Total each owned a 50% interest in AMSO, LLC. While AMSO is the operator of the project during the RD&D phase, Total will provide a majority of the funding during the RD&D phase, and technical and financial assistance throughout the RD&D and commercial stages. Total will lead the planning of the commercial development and will assume management responsibilities during the subsequent commercial phase.
	AMSO agreed to fund AMSO, LLC’s expenditures as follows: 20% of the initial $50 million of expenditures, 35% of the next $50 million in approved expenditures and 50% of approved expenditures in excess of $100 million. AMSO also agreed to fund 40% of the costs of the one-time payment for conversion of AMSO, LLC’s RD&D Lease to a commercial lease, in the event AMSO, LLC’s application for conversion is approved. The remaining amounts are to be funded by Total. As of December 31, 2013, the cumulative contributions of AMSO and Total to AMSO, LLC were $69.0 million. Through December 31, 2011, AMSO was allocated 20% of the net loss of AMSO, LLC. AMSO’s allocated share of the net loss of AMSO, LLC increased in December 2011 from 20% to 35%, per the agreement with Total. AMSO’s allocated share of the net loss of AMSO, LLC is included in “Equity in the net loss of AMSO, LLC” in the accompanying consolidated statements of operations.
	AMSO has the right to decide whether or not to fund its shares of each capital call issued by AMSO, LLC. AMSO did not fund the capital call for the first quarter of 2014, and in January 2014, Total funded AMSO’s share, which was $0.9 million. Because of AMSO’s decision not to fund its share, AMSO’s ownership interest in AMSO, LLC was reduced to 48.16% and Total’s ownership interest increased to 51.84%. In addition, AMSO’s share of future funding of AMSO, LLC up to a cumulative $100 million was reduced to 33.7% and Total’s share increased to 66.3%. AMSO’s share of AMSO, LLC’s approved budget for the year ending December 31, 2014 was $3.2 million. AMSO is evaluating its options with respect to funding AMSO, LLC during 2014, and funding of less than its full share would result in further dilution of its interest in AMSO, LLC.
	The agreements with Total provide for varying consequences for AMSO’s failure to fund its share at different stages of the project, including dilution of AMSO’s interest in AMSO, LLC or paying interest to Total for expenditures they fund on behalf of AMSO. Either Total or AMSO may terminate its obligations to make capital contributions and withdraw as a member of AMSO, LLC. Even if AMSO were to withdraw its interest in AMSO, LLC, it will remain liable for its share of expenditures for safety and environmental reclamation related to events occurring prior to its withdrawal.
	The Company accounts for its ownership interest in AMSO, LLC using the equity method since the Company has the ability to exercise significant influence over its operating and financial matters, although it does not control AMSO, LLC. AMSO, LLC is a variable interest entity, however, the Company has determined that it is not the primary beneficiary, as the Company does not have the power to direct the activities of AMSO, LLC that most significantly impact AMSO, LLC’s economic performance.
	The following table summarizes the change in the balance of the Company’s investment in AMSO, LLC:
	(in thousands)	Year ended			Year ended			Five Months ended			Year ended
		December 31,			December 31,			December 31,			July 31,
		2013			2012			2011			2011
	Balance, beginning of period	$	242		$	(685	)	$	(630	)	$	665
	Capital contributions		2,700			4,102			2,040			3,943
	Equity in net loss of AMSO, LLC		(3,194	)		(3,175	)		(2,095	)		(5,238	)
	Balance, end of period	$	(252	)	$	242		$	(685	)	$	(630	)
	At December 31, 2013, the liability for equity loss in AMSO, LLC was included in “Accrued expenses” in the consolidated balance sheet. At December 31, 2012, the investment in AMSO, LLC was included in “Other assets” in the consolidated balance sheet.
	Because of AMSO’s decision not to fund its share of AMSO, LLC’s expenditures, AMSO, LLC will allocate its net loss beginning January 2014 as follows. AMSO, LLC will allocate the first $2.6 million of losses to Total, then it will allocate any remaining losses proportionately such that AMSO and Total’s capital accounts as a percentage of AMSO, LLC’s total capital equals their ownership interests.
	At December 31, 2013, the Company’s maximum exposure to additional loss because of its required investment in AMSO, LLC was $3.0 million, based on AMSO, LLC’s 2014 budget. The Company’s maximum exposure to additional loss could increase based on the situations described above. The maximum exposure at December 31, 2013 was determined as follows:
	(in thousands)
	AMSO’s committed investment in AMSO, LLC based on the 2014 budget	$	3,247
	Less: cumulative capital contributions to AMSO, LLC		—
	Less: liability for equity loss in AMSO, LLC at December 31, 2013		(252	)
	Maximum exposure to additional loss	$	2,995
	Summarized balance sheets of AMSO, LLC are as follows:
	December 31	2013			2012
	(in thousands)
	ASSETS
	Cash and cash equivalents	$	883		$	2,171
	Other current assets		141			69
	Equipment, net		36			53
	Other assets		—			805
	TOTAL ASSETS	$	1,060		$	3,098
	LIABILITIES AND MEMBERS’ INTERESTS
	Current liabilities	$	1,024		$	1,649
	Other liabilities		644			644
	Members’ interests		(608	)		805
	TOTAL LIABILITIES AND MEMBERS’ INTERESTS	$	1,060		$	3,098
	Summarized statements of operations of AMSO, LLC are as follows:
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	REVENUES	$	—		$	—		$	—		$	—		$	—
	OPERATING EXPENSES:
	General and administrative		566			507			248			767			336
	Research and development		8,601			8,563			9,156			25,423			7,955
	TOTAL OPERATING EXPENSES		9,167			9,070			9,404			26,190			8,291
	Loss from operations		(9,167	)		(9,070	)		(9,404	)		(26,190	)		(8,291	)
	Other income (expense)		41			—			—			(1	)		—
	NET LOSS	$	(9,126	)	$	(9,070	)	$	(9,404	)	$	(26,191	)	$	(8,291	)

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2013
Property and Equipment [Abstract]	'
Property and Equipment	'
	Note 7—Property and Equipment
	December 31	2013			2012
	(in thousands)
	Computer software and development	$	516		$	340
	Computers and computer hardware		264			220
	Laboratory equipment		411			383
	Office equipment and other		228			237
			1,419			1,180
	Less accumulated depreciation		(858	)		(771	)
	Property and equipment, net	$	561		$	409

Revolving_Line_of_Credit

Revolving Line of Credit	12 Months Ended
	Dec. 31, 2013
Revolving Line of Credit [Abstract]	'
Revolving Line of Credit	'
	Note 8—Revolving Line of Credit
	As of April 23, 2012, the Company and IDT Energy entered into a Loan Agreement with JPMorgan Chase Bank for a revolving line of credit for up to a maximum principal amount of $25.0 million. On April 30, 2013, the Loan Agreement was modified to extend the maturity date from April 30, 2013 to April 30, 2014. The proceeds from the line of credit may be used to provide working capital and for the issuance of letters of credit. The Company agreed to deposit cash in a money market account at JPMorgan Chase Bank as collateral for the line of credit equal to the greater of (a) $10.0 million or (b) the sum of the amount of letters of credit outstanding plus the outstanding principal under the revolving note. The Company is not permitted to withdraw funds or exercise any authority over the required balance in the collateral account. The principal outstanding will bear interest at the lesser of (a) the LIBOR rate multiplied by the statutory reserve rate established by the Board of Governors of the Federal Reserve System plus 1.0% per annum, or (b) the maximum rate per annum permitted by whichever of applicable federal or Texas laws permit the higher interest rate. Interest is payable at least every three months and all outstanding principal and any accrued and unpaid interest is due on the maturity date. The Company pays a quarterly unused commitment fee of 0.08% per annum on the difference between $25.0 million and the average daily outstanding principal balance of the note. In addition, as of April 23, 2012, GEIC issued a Corporate Guaranty to JPMorgan Chase Bank whereby GEIC unconditionally guarantees the full payment of all indebtedness of the Company and IDT Energy under the Loan Agreement. At December 31, 2013 and 2012, there were no amounts borrowed under the line of credit, and cash collateral of $10.0 million was included in “Restricted cash—short-term” in the consolidated balance sheet. In addition, at December 31, 2013 and 2012, letters of credit of $5.7 million and nil, respectively, were outstanding.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	Note 9—Income Taxes
	The components of (loss) income before income taxes are as follows:
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Domestic	$	9,467		$	10,544		$	2,603		$	13,310		$	7,721
	Foreign		(12,053	)		(10,149	)		(2,255	)		(8,920	)		(2,624	)
	(LOSS) INCOME BEFORE INCOME TAXES	$	(2,586	)	$	395		$	348		$	4,390		$	5,097
	Significant components of the Company’s deferred income tax assets consist of the following:
	December 31	2013			2012
	(in thousands)
	Deferred income tax assets:
	Bad debt reserve	$	381		$	54
	Accrued expenses		3,454			2,330
	State taxes		56			359
	Charitable contributions		219			71
	Net operating loss		9,534			7,084
	Stock options and restricted stock		2,793			1,464
	Depreciation		1,056			1,098
	Total deferred income tax assets		17,493			12,460
	Valuation allowance		(16,653	)		(11,861	)
	DEFERRED INCOME TAX ASSETS, NET	$	840		$	599
	Subsequent to the Spin-Off, the Company initiated a tax strategy that enables the Company to deduct losses from its foreign subsidiaries against its profitable U.S. operations. Because of this strategy, the decrease in pre-tax earnings of IDT Energy in 2012, and the Company’s current projections, the Company concluded that it no longer met the criteria of more likely than not in order to utilize its deferred federal income tax assets in the foreseeable future. Accordingly, in 2012, the Company recorded a valuation allowance against its deferred federal income tax assets and only the state portion of IDT Energy deferred tax assets are reflected.
	The provision for income taxes consists of the following:
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Current:
	Federal	$	1,112		$	—		$	392		$	4,869		$	3,191
	State and local		1,891			(1,312	)		735			2,760			990
	Foreign		(7	)		—			—			—			—
			2,996			(1,312	)		1,127			7,629			4,181
	Deferred:
	Federal		—			3,773			(392	)		(198	)		—
	State and local		(241	)		469			(119	)		(486	)		—
	Foreign		—			—			—			—			—
			(241	)		4,242			(511	)		(684	)		—
	PROVISION FOR INCOME TAXES	$	2,755		$	2,930		$	616		$	6,945		$	4,181
	The differences between income taxes expected at the U.S. federal statutory income tax rate and income taxes provided are as follows:
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	U.S. federal income tax at statutory rate	$	(904	)	$	138		$	122		$	1,537		$	1,784
	Valuation allowance		2,447			4,711			—			—			—
	Foreign tax rate differential		48			41			74			3,122			918
	Other		66			4			20			804			835
	State and local income tax, net of federal benefit		1,098			(1,964	)		400			1,482			644
	PROVISION FOR INCOME TAXES	$	2,755		$	2,930		$	616		$	6,945		$	4,181
	At December 31, 2013, the Company had U.S. federal and state net operating loss carry-forwards of approximately $4.9 million and $37.8 million, respectively. These carry-forward losses are available to offset future U.S. federal and state taxable income. The federal net operating loss carry-forwards will start to expire in 2032, with the year ended December 31, 2013’s loss expiring in 2034. The state net operating loss carry-forwards will start to expire in 2028, with the year ended December 31, 2013’s loss expiring in 2034.
	At December 31, 2013, the Company had foreign net operating loss carry-forwards of approximately $30.1 million, of which $29.9 million will not expire. This carry-forward loss is available to offset future foreign taxable income.
	The change in the valuation allowance for deferred income taxes was as follows:
	(in thousands)	Balance at			Additions			Deductions			Balance at
		beginning of			charged to						end of period
		period			costs and
					expenses
	Year ended December 31, 2013
	Reserves for valuation allowances deducted from deferred income taxes, net	$	11,861		$	4,792		$	—		$	16,653
Year ended December 31, 2012
Reserves for valuation allowances deducted from deferred income taxes, net	$	6,523		$	5,338		$	—		$	11,861
Five months ended December 31, 2011
Reserves for valuation allowances deducted from deferred income taxes, net	$	6,522		$	1		$	—		$	6,523
Year ended July 31, 2011
Reserves for valuation allowances deducted from deferred income taxes, net	$	4,391		$	2,131		$	—		$	6,522
The table below summarizes the change in the balance of unrecognized income tax benefits:
(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
	December 31,			December 31,			ended			July 31,			ended
	2013			2012			December 31,			2011			December 31,
							2011						2010
													(Unaudited)
Balance at beginning of period	$	223		$	2,507		$	2,340		$	1,050		$	1,050
Additions based on tax positions related to the current period		—			89			167			979			90
Additions for tax positions of prior periods		319			—			—			311			—
Reductions for tax positions of prior periods		—			—			—			—			—
Settlements		—			(2,373	)		—			—			—
Lapses of statutes of limitations		—			—			—			—			—
Balance at end of period	$	542		$	223		$	2,507		$	2,340		$	1,140
All of the unrecognized income tax benefits at December 31, 2013 and 2012 would have affected the Company’s effective income tax rate if recognized. The Company does not expect the total amount of unrecognized tax benefits to significantly increase or decrease within the next twelve months.
In the years ended December 31, 2013 and 2012, the year ended July 31, 2011, and the five months ended December 31, 2011 and 2010 (Unaudited), the Company recorded interest on income taxes of nil, nil, $0.2 million, $0.1 million and nil, respectively. As of December 31, 2013 and 2012, accrued interest included in current income taxes payable was nil and nil, respectively.
The Company currently remains subject to examinations of its tax returns as follows: U.S. federal tax returns for fiscal 2009 to calendar 2013, state and local tax returns generally for fiscal 2008 to calendar 2013 and foreign tax returns generally for fiscal 2008 to calendar 2013.

Equity

Equity	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Equity	'
	Note 10—Equity
	Class A Common Stock and Class B Common Stock
	The rights of holders of Class A common stock and Class B common stock are identical except for certain voting and conversion rights and restrictions on transferability. The holders of Class A common stock and Class B common stock receive identical dividends per share when and if declared by the Company’s Board of Directors. In addition, the holders of Class A common stock and Class B common stock have identical and equal priority rights per share in liquidation. The Class A common stock and Class B common stock do not have any other contractual participation rights. The holders of Class A common stock are entitled to three votes per share and the holders of Class B common stock are entitled to one-tenth of a vote per share. Each share of Class A common stock may be converted into one share of Class B common stock, at any time, at the option of the holder. Shares of Class A common stock are subject to certain limitations on transferability that do not apply to shares of Class B common stock.
	Series 2012-A Preferred Stock
	Each share of Series 2012-A Preferred Stock (the “Preferred Stock”) has a liquidation preference of $8.50 (the "Liquidation Preference"), and is entitled to receive an annual dividend per share equal to the sum of (i) $0.6375 (the "Base Dividend") plus (ii) seven and one-half percent (7.5%) of the quotient obtained by dividing (A) the amount by which the EBITDA for a fiscal year of the Company's retail energy provider business exceeds $32 million by (B) 8,750,000 (the "Additional Dividend"), payable in cash. The Preferred Stock is redeemable, in whole or in part, at the option of the Company following October 11, 2016. The redemption price for the Preferred Stock is 101% of the Liquidation Preference plus all accrued and unpaid dividends between October 11, 2016 and October 11, 2017, and 100% of the Liquidation Preference plus all accrued and unpaid dividends thereafter. EBITDA consists of income (loss) from operations exclusive of depreciation and amortization and other operating gains (losses).
	During any period when the Company has failed to pay a dividend on the Preferred Stock and until all unpaid dividends have been paid in full, the Company is prohibited from paying dividends or distributions on the Company's Class B or Class A common stock.
	The Base Dividend is payable (if declared by the Company's Board of Directors, and accrued, if not declared) quarterly on each February 15, May 15, August 15 and November 15, and to the extent that there is any Additional Dividend payable with respect to a fiscal year, it will be paid to holders of Preferred Stock with the May dividend. With respect to the payment of dividends and amounts upon liquidation, dissolution or winding up, the Preferred Stock is equal in rank to all other equity securities the Company issues, the terms of which specifically provide that such equity securities rank on a parity with the Preferred Stock with respect to dividend rights or rights upon the Company's liquidation, dissolution or winding up; senior to the Company's common stock; and junior to all of the Company's existing and future indebtedness.
	Each share of Preferred Stock has the same voting rights as a share of Class B common stock, except on certain matters that only impact the Company's common stock, as well as additional voting rights on specific matters or upon the occurrence of certain events.
	Dividend Payments
	On January 5, 2012, the Company paid a cash dividend of $0.05 per share to stockholders of record at the close of business on December 22, 2011 of the Company’s Class A common stock and Class B common stock. On April 3, 2012, the Company paid a cash dividend of $0.033 per share to stockholders of record at the close of business on March 26, 2012 of the Company’s Class A common stock and Class B common stock. The dividend paid on April 3, 2012 was for the two-month period of November and December 2011 that represented the period between the end of the Company’s prior fiscal quarter and the beginning of the new fiscal quarter in connection with the change in the Company’s fiscal year to a calendar year, and represented a pro-rated dividend of 2/3rd of the normal quarterly dividend. On May 30, 2012, the Company paid a cash dividend of $0.05 per share to stockholders of record at the close of business on May 21, 2012 of the Company’s Class A and Class B common stock. On August 28, 2012, the Company paid a cash dividend of $0.05 per share to stockholders of record at the close of business on August 20, 2012 of the Company’s Class A and Class B common stock. The aggregate dividends declared in the year ended December 31, 2012 and the five months ended December 31, 2011 were $3.1 million and $1.1 million, respectively, and the aggregate dividends paid in the year ended December 31, 2012 were $4.2 million. In connection with the completion of the exchange offer and issuance of the Preferred Stock (see below), the Company has suspended payment of dividends on its Class A and Class B common stock for the foreseeable future. Accordingly, no dividends were declared or paid in 2013.
	On February 15, 2013, the Company paid a pro-rated Base Dividend of $0.1317 per share on the Preferred Stock for the fourth quarter of 2012. On May 15, 2013, August 15, 2013, November 15, 2013 and on February 14, 2014, the Company paid a quarterly Base Dividend of $0.1594 per share on the Preferred Stock for the four quarters of 2013. The aggregate dividends declared and paid on the Preferred Stock in the year ended December 31, 2013 were $1.1 million.
	Stock Repurchase Program
	On March 11, 2013, the Board of Directors of the Company approved a stock repurchase program for the repurchase of up to an aggregate of 7 million shares of the Company’s Class B common stock. At December 31, 2013, no repurchases had been made and 7 million shares remained available for repurchase under the stock repurchase program.
	Exchange Offers and Issuances of Preferred Stock
	On August 2, 2012, the Company initiated an offer to exchange up to 8.75 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on October 10, 2012. On October 17, 2012, the Company issued 1,604,591 shares of its newly designated Preferred Stock in exchange for an equal number of shares of Class B common stock tendered in the exchange offer.
	On November 26, 2012, the Company initiated an offer to exchange up to 7.15 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on March 5, 2013. On March 11, 2013, the Company issued 313,376 shares of its Preferred Stock in exchange for an equal number of shares of Class B common stock tendered in the exchange offer.
	Sales of Equity of Subsidiaries
	Per the terms of his employment agreement, Dr. Harold Vinegar, Chief Scientist of the Company (“Vinegar”), has an option to purchase, at fair value, up to 10% of the GOGAS ventures in which he is a key contributor:
	•	In November 2008, Vinegar purchased a 10% interest in IEI.
	•	In October 2013, the Company completed the sale of 9.5% of the equity in Afek to Vinegar as per the terms of his employment agreement.
	•	In November 2013, the Company completed the sale of 9.8% of the equity in Genie Mongolia to Vinegar as per the terms of his employment agreement.
	In connection with Vinegar’s November 2008 purchase of a 10% interest in IEI, the purchase agreement included certain no cost anti-dilution protection as follows. If IEI issues certain of its shares in order to raise capital until the capitalization of IEI equals $20 million, IEI shall issue to Vinegar additional shares to maintain his 10% interest in IEI. In December 2013, IEI converted its intercompany payable to GOGAS into preferred stock. Pursuant to the anti-dilution protection, IEI issued shares of its preferred stock to Vinegar equal to 10% of $20 million or $2.0 million, which the Company recorded as an increase in “Noncontrolling interests” and a corresponding decrease in “Additional paid-in capital”.
	In June 2011, in a refinement of the terms of the initial investment and the rights associated with that investment, Michael Steinhardt, the Chairman of the Board of IEI, exchanged his interest in GEIC (including an option to purchase additional interests) for a corresponding 2.5% interest (including options) in GOGAS. In addition, Mr. Steinhardt arranged for the Company and IDT to receive certain consulting services from a third party. In return, the Steinhardt stockholder entity was paid $1.7 million. The GOGAS stock option was issued in June 2011 and is exercisable until April 9, 2015 at an exercise price of $5.0 million. At December 31, 2013 and 2012, the estimated fair value of the GOGAS stock option was nil. The Company accounted for the exchange of Mr. Steinhardt’s equity interest in GEIC for a corresponding equity interest in GOGAS as an equity transaction. Therefore, no gain or loss was recognized in the accompanying consolidated statement of operations.
	In November 2010, GOGAS sold a 5.0% equity interest to an entity affiliated with Lord (Jacob) Rothschild for $10.0 million paid in cash. Also in November 2010, GOGAS sold a 0.5% equity interest to Rupert Murdoch for $1.0 million paid with a promissory note. The note is secured by a pledge of the shares issued in exchange for the note. The note accrues interest at 1.58% per annum, and the principal and accrued interest is due and payable on November 15, 2015. In connection with the purchase by the entity affiliated with Lord Rothschild, in November 2010, warrants were issued to purchase up to an aggregate of 1% of the common stock outstanding of GOGAS at an exercise price of up to $2 million that expired on November 12, 2011. In addition, in connection with this purchase, the entity affiliated with Lord Rothschild has a one-time option through November 12, 2017 to exchange its GOGAS shares for shares of the Company with equal fair value as determined by the parties. The number of shares issuable in such an exchange is not currently determinable.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2013
Stock-Based Compensation [Abstract]	'
Stock-Based Compensation	'
	Note 11— Stock-Based Compensation
	Stock-Based Compensation Plan
	The Company’s 2011 Stock Option and Incentive Plan is intended to provide incentives to executives, employees, directors and consultants of the Company. Incentives available under the 2011 Stock Option and Incentive Plan may include stock options, stock appreciation rights, limited rights, deferred stock units, and restricted stock. The plan is administered by the Compensation Committee of the Company’s Board of Directors. At December 31, 2013, the Company had 1.14 million shares of Class B common stock reserved for award under its 2011 Stock Option and Incentive Plan and 0.2 million shares were available for future grants. In addition, as a result of the Spin-Off, the Company reserved 2.5 million shares of Class B common stock for grants in connection with the equitable adjustment by IDT of certain awards previously granted by IDT.
	Restricted Stock
	The fair value of restricted shares of the Company’s Class B common stock is determined based on the closing price of the Company’s Class B common stock on the grant date. Share awards generally vest on a graded basis over three years of service.
	A summary of the status of the Company’s grants of restricted shares of Class B common stock is presented below:
		Number of			Weighted-
		Non-vested Shares			Average Grant
		(in thousands)			Date Fair
					Value
	Non-vested shares at December 31, 2012		1,898		$	2.7
	Granted		75			9.81
	Vested		(1,708	)		1.92
	Forfeited		—			—
	NON-VESTED SHARES AT DECEMBER 31, 2013		265		$	9.74
	As of December 31, 2013, there was $1.2 million of total unrecognized compensation cost related to non-vested stock-based compensation arrangements, which is expected to be recognized over a weighted-average period of 1.2 years. The total grant date fair value of shares vested in the years ended December 31, 2013 and 2012 and the five months ended December 31, 2011 was $3.3 million, $3.0 million and $15,000, respectively. The Company recognized compensation cost related to the vesting of the restricted stock of $2.0 million and $2.1 million in the years ended December 31, 2013 and 2012, respectively, and $0.6 million in the five months ended December 31, 2011.
	Effective December 12, 2013, the Company issued 63,917 restricted shares of its Class B common stock to the President of the Company. The restricted shares vest in commencing in January 2014 through January 2017. The fair value of the restricted shares on the date of the grant was $0.7 million, which will be recognized on a straight-line basis over the vesting period.
	Effective January 6, 2014, the Company issued 29,126 restricted shares of its Class B common stock to Michael Stein, Senior Vice President of the Company, and son-in-law of Howard Jonas, the Chairman of the Company’s Board of Directors and Chief Executive Officer of the Company. The restricted shares vest in three equal annual installments commencing on January 5, 2015. The fair value of the restricted shares on the date of the grant was $0.3 million, which will be recognized on a straight-line basis over the vesting period.
	Stock Options
	Option awards are generally granted with an exercise price equal to the market price of the Company’s stock on the date of grant. Option awards generally vest on a graded basis over three years of service and have ten-year contractual terms. Expected volatility is based on historical volatility of the Company’s Class B common stock and other factors. The Company uses historical data on exercise of stock options, post vesting forfeitures and other factors to estimate the expected term of the stock-based payments granted. The risk free rate is based on the U.S. Treasury yield curve in effect at the time of grant.
	On December 12, 2013, the Compensation Committee and the Board of Directors of the Company approved, subject to the approval of the Company’s stockholders, a compensation arrangement with Howard Jonas upon his appointment as the Company’s Chief Executive Officer for a five-year term that commenced on January 1, 2014. The compensation arrangement included, among other things, the grant of options to purchase 3.0 million shares of the Company’s Class B Common Stock at an exercise price of $10.30 per share. The exercise price was equal to the fair market value of the shares on the date of the grant. The options vest in five equal annual installments commencing on December 15, 2014 and expire ten years from the grant date. The estimated total value of the options on the date of the grant was $19.3 million, which will be recognized on a straight-line basis over the vesting period.
	The fair value of stock options was estimated on the date of the grant using a Black-Scholes valuation model and the assumptions in the following table. No option awards were granted in the year ended December 31, 2012 or the year ended July 31, 2011.
		Year ended			Five Months
		December 31,			ended
		2013			December 31,
					2011
	ASSUMPTIONS
	Average risk-free interest rate		2.07%			1.06-1.62%
	Expected dividend yield		—			—
	Expected volatility		65.60%			67.70%
	Expected term		6.5 years			6.0-7.25 years
	A summary of stock option activity for the Company is as follows:
		Number of			Weighted-		Weighted-		Aggregate
		Options			Average		Average		Intrinsic Value
		(in thousands)			Exercise		Remaining		(in thousands)
					Price		Contractual
							Term (in  years)
	Outstanding at December 31, 2012		457		$	6.85		8.2	$	114
	Granted		3,000			10.3
	Exercised		(13	)		6.85
	Cancelled / Forfeited		(1	)		6.85
	OUTSTANDING AT DECEMBER 31, 2013		3,443		$	9.86		7.8	$	1,489
	EXERCISABLE AT DECEMBER 31, 2013		126		$	6.85		5.7	$	424
	The weighted-average grant date fair value of options granted by the Company during the year ended December 31, 2013 and the five months ended December 31, 2011 was $6.42 and $4.35, respectively. The total intrinsic value of options exercised during the years ended December 31, 2013 and 2012 was $29,000 and $2,000, respectively. As of December 31, 2013, there was $20.2 million of total unrecognized compensation cost related to non-vested stock options, which is expected to be recognized over a weighted-average period of 2.5 years. The Company recognized compensation cost related to the vesting of the options of $0.4 million in the years ended December 31, 2013 and 2012, and $0.1 million in the five months ended December 31, 2011.
	In order to equitably adjust the value of the options to purchase IDT Class B common stock that were outstanding on the Spin-Off date, IDT proportionately reduced the exercise price of each such option based on the trading price of IDT following the Spin-Off. Further, each option holder shared ratably in a pool of 50,000 newly issued options to purchase shares of the Company’s Class B common stock with an exercise price of $6.85 equal to the market value on the issuance date and an expiration date equal to the expiration of the corresponding IDT options held by such option holder. The adjustment to the exercise price of the options to purchase IDT shares and the issuance of the 50,000 options to purchase the Company’s shares were accounted for as a modification. No incremental charge was required as a result of the modification.
	Restricted Stock Granted by IDT Corporation
	In the year ended July 31, 2011, stock-based compensation cost of $0.8 million was included in “Selling, general and administrative expense” in the consolidated statements of operations, relating to restricted stock granted by IDT Corporation to employees of the Company.
	Grants of Equity of Subsidiaries
	In the year ended July 31, 2010, GEIC granted common stock representing 0.5% of its outstanding shares at the time to a consultant for consulting services provided through April 30, 2011. The share award vested over the related service period. In the year ended July 31, 2011, the Company recorded stock-based compensation of $0.3 million.
	On October 21, 2009, Mr. James A. Courter, IDT’s former Chief Executive Officer, received from IDT a grant of 0.3 million restricted shares of IDT’s Class B common stock. All of the restricted shares vested on the date of grant. Pursuant to a Warrant to Purchase Common Stock executed by IDT and Mr. Courter, Mr. Courter has the right to exchange shares of IDT’s Class B common stock for up to 1,000 shares of GEIC common stock. The exchange ratio is 225.13 shares of IDT’s Class B common stock for one share of GEIC common stock. The Warrant expires on October 21, 2014.
	On March 28, 2012, the Compensation Committee of the Company’s Board of Directors approved the grant of equity interests in certain subsidiaries of the Company to Howard Jonas. The Compensation Committee approved the following grants to Mr. Jonas: (1) deferred stock units for shares of common stock of IDT Energy representing 2.5% of the equity in IDT Energy on a fully diluted basis, (2) ordinary shares of IEI representing 0.25% of the equity in IEI on a fully diluted basis, (3) ordinary shares of Afek representing 0.30% of the equity in Afek on a fully diluted basis, and (4) shares representing 0.25% of the equity in Genie Mongolia. In addition, the Compensation Committee approved grants of interests representing 1.13% of the equity in IDT Energy, 1.4% of the equity in IEI, 1.4% of the equity in Afek and 2.2% of the equity in Genie Mongolia to certain of the Company’s officers and employees. In May 2013, the Company granted 1.0% of the equity in IEI to certain employees of the Company. On November 4, 2013, the Company’s Board of Directors approved the grant of 1.0% of the equity in Genie Mongolia to Michael Jonas, Executive Vice President of GOGAS, and the executive managing the Company’s business in Mongolia. Michael Jonas is also the son of Howard Jonas. The fair value of these grants of equity interests on the date of the grant was estimated to be $5.4 million, which will be recognized over the vesting periods that ends at various dates through July 2017. The fair value of the equity interests granted was estimated based on discounted cash flows of the subsidiaries that granted the equity awards, as well as other valuation techniques, as applicable. The unrecognized compensation cost relating to these grants of equity interests at December 31, 2013 was $2.7 million, which is expected to be recognized over a weighted-average period of 1.0 year. The Company recognized compensation cost related to the vesting of these equity interests of $1.8 million and $0.9 million in the years ended December 31, 2013 and 2012, respectively.
	The Company elected to exchange vested deferred stock units of IDT Energy previously granted to employees and directors of the Company for shares of the Company’s Class B common stock upon the vesting of the deferred stock units based on the relative fair value of the shares exchanged. Accordingly, in August 2013, the Company issued 133,758 shares of the Company’s Class B common stock in exchange for 23.6 vested deferred stock units of IDT Energy.

Variable_Interest_Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2013
Variable Interest Entities [Abstract]	'
Variable Interest Entities	'
	Note 12—Variable Interest Entities
	In 2011, an employee of IDT, until his employment was terminated effective December 30, 2011, incorporated Citizens Choice Energy, LLC (“CCE”), which is a REP that resells electricity and natural gas to residential and small business customers in the State of New York. Tari Corporation (“Tari”) is the sole owner of CCE. In addition, DAD Sales, LLC (“DAD”), which is 100% owned by Tari, used its network of door-to-door sales agents to obtain customers for CCE. In December 2012, DAD ceased to acquire customers for CCE. The Company provided CCE, DAD and Tari with substantially all of the cash required to fund their operations. The Company determined that at the present time it has the power to direct the activities of CCE, DAD and Tari that most significantly impact their economic performance and it has the obligation to absorb losses of CCE, DAD and Tari that could potentially be significant to CCE, DAD and Tari on a stand-alone basis. The Company therefore determined that it is the primary beneficiary of CCE, DAD and Tari, and as a result, the Company consolidates CCE, DAD and Tari within its IDT Energy segment. The Company does not own any interest in CCE, DAD or Tari and thus the net income or loss incurred by CCE, DAD and Tari was attributed to noncontrolling interests in the accompanying consolidated statements of operations.
	Net income (loss) of CCE, DAD and Tari and aggregate net funding repaid to (provided by) the Company to CCE, DAD and Tari in order to finance their operations were as follows:
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Net income (loss):
	CCE	$	2,080		$	1,857		$	(235	)	$	(2,041	)	$	—
	DAD		(67	)		(327	)		(477	)		(263	)		—
	Tari		52			161			—			(3	)		—
	Aggregate funding repaid to (provided by) the Company, net		4,118			738			(2,529	)		(3,291	)		—
	Summarized consolidated balance sheets of CCE, DAD and Tari are as follows:
	December 31	2013			2012
	(in thousands)
	ASSETS
	Cash and cash equivalents	$	434		$	1,047
	Restricted cash		537			39
	Trade accounts receivable		2,459			4,168
	Prepaid expenses		364			485
	Other current assets		353			519
	Fixed assets, net		—			38
	Other assets		449			493
	TOTAL ASSETS	$	4,596		$	6,789
	LIABILITIES AND NONCONTROLLING INTERESTS
	Current liabilities	$	2,937		$	3,035
	Due to IDT Energy		964			5,082
	Noncontrolling interests		695			(1,328	)
	TOTAL LIABILITIES AND NONCONTROLLING INTERESTS	$	4,596		$	6,789
	The assets of CCE, DAD and Tari may only be used to settle obligations of CCE, DAD and Tari, and may not be used for other consolidated entities. The liabilities of CCE, DAD and Tari are non-recourse to the general credit of the Company’s other consolidated entities.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Accumulated Other Comprehensive Income	'
	Note 13—Accumulated Other Comprehensive Income
	The accumulated balances for each classification of other comprehensive income (loss) were as follows:
	(in thousands)	Unrealized			Foreign			Accumulated			Location of (Gain)
		loss on			currency			other			Loss Recognized
		available-for-			translation			comprehensive
		sale securities						income (loss)
	Balance at July 31, 2010	$	—		$	(24	)	$	(24	)
	Other comprehensive income attributable to Genie		—			381			381
	Balance at July 31, 2011		—			357			357
	Other comprehensive loss attributable to Genie		—			(494	)		(494	)
	Balance at December 31, 2011		—			(137	)		(137	)
	Other comprehensive income attributable to Genie		(15	)		422			407
	Balance at December 31, 2012		(15	)		285			270
	Other comprehensive (loss) income before reclassifications		(55	)		460			405
	Amounts reclassified from accumulated other comprehensive income		70			—			70		Interest income
	Net other comprehensive income		15			460			475
	BALANCE AT DECEMBER 31, 2013	$	—		$	745		$	745

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	Note 14—Commitments and Contingencies
	Legal Proceedings
	On March 13, 2014, named plaintiff Anthony Ferrare commenced a putative class-action lawsuit against IDT Energy in the Court of Common Pleas of Philadelphia County, Pennsylvania.  The plaintiff filed the suit on behalf of himself and other former and current customers of IDT Energy in Pennsylvania, whom he contends were injured as a result of IDT Energy’s allegedly unlawful sales and marketing practices.  IDT Energy denies that there is any basis for the suit and any alleged wrongdoing, and intends to vigorously defend the claim.
	In addition to the above, the Company may from time to time be subject to legal proceedings that arise in the ordinary course of business. Although there can be no assurance in this regard, the Company does not expect any of those legal proceedings to have a material adverse effect on the Company’s results of operations, cash flows or financial condition.
	Purchase and Other Commitments
	The Company had purchase commitments of $2.2 million as of December 31, 2013.
	In October 2013, the Company entered into a contract related to Afek’s exploration drilling program pursuant to which the Company’s purchase commitment at December 31, 2013 was $0.5 million.
	Tax Audits
	In July 2013, IDT Energy negotiated a settlement of an audit of its New York State sales and use tax for the period from June 2003 through August 2009. As a result, IDT Energy paid $0.9 million in July 2013, all of which was previously accrued.
	The Company is subject to audits in various jurisdictions for various taxes. At December 31, 2013, the Company accrued $0.3 million for the estimated loss from these audits for which it is probable that a liability has been incurred. Amounts asserted by taxing authorities or the amount ultimately assessed against the Company could be greater than the accrued amount. Accordingly, additional provisions may be recorded in the future as revised estimates are made or underlying matters are settled or resolved. Imposition of assessments as a result of tax audits could have an adverse effect on the Company’s results of operations, cash flows and financial condition.
	Letter of Credit
	As of December 31, 2013, the Company had letters of credit outstanding totaling $5.7 million primarily for the benefit of regional transmission organizations that coordinate the movement of wholesale electricity and for certain utility companies. The letters of credit outstanding as of December 31, 2013 expire in the year ending December 31, 2014.
	Performance Bonds
	IDT Energy has performance bonds issued through a third party for the benefit of various states in order to comply with the states’ financial requirements for retail energy providers. At December 31, 2013, IDT Energy had aggregate performance bonds of $3.2 million outstanding.
	Lease Commitments
	The future minimum payments for operating leases as of December 31, 2013 are as follows:
	(in thousands)
	Year ending December 31:
	2014	$	302
	2015		236
	2016		13
	2017		—
	2018		—
	Thereafter		—
	Total payments	$	551
	Rental expense under operating leases was $0.6 million, $0.8 million, $0.2 million, $0.3 million and $42,000 in the years ended December 31, 2013 and 2012, the year ended July 31, 2011, and the five months ended December 31, 2011 and 2010, respectively.
	Other Contingencies
	Since 2009, IDT Energy has been party to a Preferred Supplier Agreement with BP Energy Company (“BP”), pursuant to which BP is IDT Energy’s preferred provider of electricity and natural gas. The agreement’s termination date is June 30, 2015. Under the arrangement, IDT Energy purchases electricity and natural gas at market rate plus a fee. IDT Energy’s obligations to BP are secured by a first security interest in deposits or receivables from utilities in connection with their purchase of IDT Energy’s customer’s receivables, and in any cash deposits or letters of credit posted in connection with any collateral accounts with BP. IDT Energy’s ability to purchase electricity and natural gas under this agreement is subject to satisfaction of certain conditions including the maintenance of certain covenants. At December 31, 2013, the Company was in compliance with such covenants. As of December 31, 2013, restricted cash of $4.4 million and trade accounts receivable of $42.3 million were pledged to BP as collateral for the payment of IDT Energy’s trade accounts payable to BP of $18.7 million as of December 31, 2013.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Note 15—Related Party Transactions
	Up until the Spin-Off, IDT, the Company’s former parent company, charged the Company for certain transactions and allocated routine expenses based on company specific items. The allocated amounts also included charges for utilizing the net operating loss of IDT, as the Company was included in IDT’s consolidated federal income tax return in all periods through the date of the Spin-Off. In addition, IDT controlled the flow of the Company’s treasury transactions. Following the Spin-off, IDT charges the Company for services it provides pursuant to the Transition Services Agreement.
	Pursuant to the Transition Services Agreement, the Company provides specified administrative services to certain of IDT’s foreign subsidiaries. The charges for these services reduce the Company’s “Selling, general and administrative” expense.
	The amounts IDT charged the Company, and the amounts the Company charged IDT, were as follows:
	(in thousands)	Year ended		Year ended		Five Months		Year ended		Five Months
		December 31,		December 31,		ended		July 31,		ended
		2013		2012		December 31,		2011		December 31,
						2011				2010
										(Unaudited)
	Amount IDT charged the Company:
	Included in “Selling, general and administrative expense”	$	3,348	$	3,775	$	2,578	$	4,694	$	1,837
	Included in “Provision for income taxes”		—		—		1,945		5,736		3,220
	Amount the Company charged IDT		285		129		—		—		—
	The Company had notes receivable outstanding from employees aggregating $0.9 million and $0.7 million at December 31, 2013 and 2012, respectively, which are included in “Other assets” in the accompanying consolidated balance sheet.
	The Company obtains insurance policies from several insurance brokers, one of which is IGM Brokerage Corp. (“IGM”). IGM is owned by the mother of Howard Jonas, and Joyce Mason, the Company’s Corporate Secretary. Jonathan Mason, husband of Joyce Mason and brother-in-law of Howard Jonas, provides insurance brokerage services via IGM. Based on information the Company received from IGM, the Company believes that (1) IGM received commissions and fees from payments made by the Company (including payments from third party brokers) in the aggregate amounts of $11,074, $9,527 and $9,082 in the years ended December 31, 2013 and 2012 and in the five months ended December 31, 2011, respectively, which fees and commissions inured to the benefit of Mr. Mason, and (2) the total payments made by the Company to IGM for various insurance policies were $124,149, $106,812 and $101,818 in the years ended December 31, 2013 and 2012 and in the five months ended December 31, 2011, respectively. Neither Howard Jonas nor Joyce Mason has any ownership or other interest in IGM other than via the familial relationships with their mother and Jonathan Mason.

Business_Segment_Information

Business Segment Information	12 Months Ended
	Dec. 31, 2013
Business Segment Information [Abstract]	'
Business Segment Information	'
	Note 16—Business Segment Information
	The Company owns 99.3% of its subsidiary, GEIC, which owns 100% of IDT Energy and 92% of GOGAS. IDT Energy has outstanding deferred stock units granted to directors and employees that represent an interest of 2.3% of the equity of IDT Energy. The Company has two reportable business segments: IDT Energy, an REP supplying electricity and natural gas to residential and small business customers in the Northeastern United States, and Genie Oil and Gas, which is pioneering technologies to produce clean and affordable transportation fuels from the world's abundant oil shales and other fuel resources. The Genie Oil and Gas segment consists of (1) a 48.16% interest in AMSO, LLC, the Company’s oil shale project in Colorado, (2) an 88.6% interest in IEI, the Company’s oil shale project in Israel, (3) an 89% interest in Afek, the Company’s conventional oil and gas exploration project in the southern portion of the Golan Heights, and (4) a 90% interest in Genie Mongolia, the Company’s oil shale exploration project in Central Mongolia. Corporate costs include unallocated compensation, consulting fees, legal fees, business development expenses and other corporate-related general and administrative expenses. Corporate does not generate any revenues, nor does it incur any direct cost of revenues.
	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 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. There are no significant asymmetrical allocations to segments.
	Operating results for the business segments of the Company were as follows:
	(in thousands)	IDT Energy		Genie Oil and Gas			Corporate			Total
	Year ended December 31, 2013
	Revenues	$	279,174	$	—		$	—		$	279,174
	Income (loss) from operations		25,696		(15,955	)		(9,115	)		626
	Depreciation		15		94			1			110
	Research and development		—		11,389			—			11,389
	Equity in the net loss of AMSO, LLC		—		3,194			—			3,194
	Year ended December 31, 2012
	Revenues	$	229,459	$	—		$	—		$	229,459
	Income (loss) from operations		24,972		(14,038	)		(7,887	)		3,047
	Depreciation		40		83			1			124
	Research and development		—		9,365			—			9,365
	Equity in the net loss of AMSO, LLC		—		3,175			—			3,175
	Five Months ended December 31, 2011
	Revenues	$	76,783	$	—		$	—		$	76,783
	Income (loss) from operations		8,907		(5,476	)		(1,703	)		1,728
	Depreciation		15		—			—			15
	Research and development		—		2,648			—			2,648
	Equity in the net loss of AMSO, LLC		—		2,095			—			2,095
	Year ended July 31, 2011
	Revenues	$	196,018	$	—		$	—		$	196,018
	Income (loss) from operations		22,458		(13,641	)		(1,843	)		6,974
	Depreciation		24		—			—			24
	Research and development		—		7,843			—			7,843
	Equity in the net loss of AMSO, LLC		—		5,238			—			5,238
	Five Months ended December 31, 2010 (unaudited)
	Revenues	$	74,877	$	—		$	—		$	74,877
	Income (loss) from operations		11,739		(5,570	)		(613	)		5,556
	Depreciation		11		—			—			11
	Research and development		—		3,045			—			3,045
	Equity in the net loss of AMSO, LLC		—		1,658			—			1,658
	There were no revenues from customers located outside of the United States in all periods presented.
	Total assets for the business segments of the Company were as follows:
	(in thousands)	IDT Energy		Genie Oil and Gas			Corporate			Total
	Total assets:
	31-Dec-13	$	76,691	$	42,193		$	39,959		$	158,843
	31-Dec-12		65,377		36,561			48,368			150,306
	31-Dec-11		60,483		2,498			87,213			150,194
	Net long-lived assets and total assets held outside of the United States, which are located primarily in Israel, were as follows:
	(in thousands)	United States		Foreign Countries			Total
	December 31, 2013
	Long-lived assets, net	$	352	$	377		$	729
	Total assets		150,315		8,528			158,843
	December 31, 2012
	Long-lived assets, net	$	71	$	346		$	417
	Total assets		142,694		7,612			150,306
	December 31, 2011
	Long-lived assets, net	$	101	$	351		$	452
	Total assets		148,180		2,014			150,194

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2013
Selected Quarterly Financial Data (Unaudited) [Abstract]	'
Selected Quarterly Financial Data (Unaudited)	'
	Note 17—Selected Quarterly Financial Data (Unaudited)
	The table below presents selected quarterly financial data of the Company for its fiscal quarters in 2013 and 2012:
	Quarter Ended				Direct cost of		Income (loss)			Net (loss)			Net (loss) income			(Loss) earnings per common share
	(in thousands,						from						attributable
													to Genie
	except per share data)		Revenues		revenues		operations			income			Energy Ltd.			Basic			Diluted
	2013:00:00
	31-Dec		$	67,071	$	50,237	$	(386	)	$	(1,118	)	$	(483	)	$	(0.04	)	$	(0.04	)
	30-Sep			71,638		51,699		3,948			2,042			1,991			0.09			0.08
	30-Jun			55,134		45,168		(5,569	)		(6,168	)		(5,901	)		(0.32	)		(0.32	)
	March 31 (1)			85,331		66,312		2,633			(97	)		(1,510	)		(0.09	)		(0.09	)
	TOTAL		$	279,174	$	213,416	$	626		$	(5,341	)	$	(5,903	)	$	(0.36	)	$	(0.36	)
	2012:00:00
	December 31 (1)		$	65,403	$	46,936	$	1,891		$	1,060		$	2,008		$	0.09		$	0.08
	30-Sep			63,725		42,285		3,469			(1,084	)		(2,641	)		(0.13	)		(0.13	)
	30-Jun			42,826		31,178		(5,006	)		(3,714	)		(3,252	)		(0.15	)		(0.15	)
	31-Mar			57,505		39,473		2,693			1,203			604			0.03			0.03
	TOTAL		$	229,459	$	159,872	$	3,047		$	(2,535	)	$	(3,281	)	$	(0.17	)	$	(0.17	)
	-1	In the fourth quarter of 2012, there were certain errors at IDT Energy impacting revenue recognized and the related receivable balances, sales tax refund receivable and a gross receipt tax accrual. The Company corrected these errors in the first quarter of 2013, although the corrections should have been recorded in the fourth quarter of 2012.  The impact of these items would have decreased the net income in 2012 and correspondingly increased the net income in 2013, by $1.7 million. The Company’s management assessed the impact of such errors on the financial statements and determined that the errors in 2012 and the related corrections in 2013 did not have a material impact on the Company’s financial statements for 2012 and 2013 and for each of the quarters within those years. Therefore, the Company’s management determined that no restatement of prior filings is necessary.

Description_of_Business_and_Su1

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

12 Months Ended

Dec. 31, 2013

Description of Business and Summary of Significant Accounting Policies [Abstract]

'

Description of Business

'

Description of Business

Genie Energy Ltd. (“Genie”), a Delaware corporation, was incorporated in January 2011. Genie owns 99.3% of its subsidiary, Genie Energy International Corporation (“GEIC”), which owns 100% of IDT Energy and 92% of Genie Oil and Gas, Inc. (“GOGAS”). IDT Energy has outstanding deferred stock units granted to directors and employees that represent an interest of 2.3% of the equity of IDT Energy. Genie’s principal businesses consist of the following:

•

IDT Energy, a retail energy provider (“REP”) supplying electricity and natural gas to residential and small business customers in the Northeastern United States; and

•

Genie Oil and Gas, which is pioneering technologies to produce clean and affordable transportation fuels from the world's abundant oil shales and other fuel resources, which consists of (1) American Shale Oil Corporation (“AMSO”), which holds and manages a 48.16% interest in American Shale Oil, L.L.C. (“AMSO, LLC”), the Company’s oil shale project in Colorado, (2) an 88.6% interest in Israel Energy Initiatives, Ltd. (“IEI”), the Company’s oil shale project in Israel, (3) an 89% interest in Afek Oil and Gas, Ltd. (formerly Genie Israel Oil and Gas, Ltd.) (“Afek”), the Company’s conventional oil and gas exploration project in the southern portion of the Golan Heights, and (4) a 90% interest in Genie Mongolia, the Company’s oil shale exploration project in Central Mongolia.

IEI holds an exclusive Shale Oil Exploration and Production License that was awarded by the Government of Israel in July 2008. The license covers an area in the south of the Shfela region in Israel. The license expires in July 2014. The license may be extended for one year through July 2015. In April 2013, the Government of Israel finalized the award to Afek of an exclusive three year petroleum exploration license in the southern portion of the Golan Heights. In April 2013, Genie Mongolia and the Petroleum Authority of Mongolia entered into an exclusive five year oil shale development agreement to explore and evaluate the commercial potential of oil shale resources in Central Mongolia.

The “Company” in these financial statements refers to Genie, IDT Energy and Genie Oil and Gas, and their respective subsidiaries,  on a consolidated basis as if Genie existed and owned its subsidiaries in all periods presented, or from the date an entity was acquired, if later.

On January 30, 2012, the Company’s Board of Directors changed the Company’s fiscal year end from July 31 to December 31, in order to better align the Company’s financial reporting with its operational and budgeting cycle and with other industry participants.

The Company's Spin-Off

'

The Company’s Spin-Off

The Company was formerly a subsidiary of IDT Corporation (“IDT”). On October 28, 2011, the Company was spun-off by IDT and became an independent public company through a pro rata distribution of the Company’s common stock to IDT’s stockholders (the “Spin-Off”). As a result of the Spin-Off, each of IDT’s stockholders received: (i) one share of the Company’s Class A common stock for every share of IDT’s Class A common stock held of record on October 21, 2011 (the “Record Date”), and (ii) one share of the Company’s Class B common stock for every share of IDT’s Class B common stock held of record on the Record Date. On October 28, 2011, 1.6 million shares of the Company’s Class A common stock, and 21.1 million shares of the Company’s Class B common stock were issued and outstanding.

Prior to the Spin-Off, IDT made a capital contribution of $82.2 million to the Company. In addition, in connection with the capital contribution received from IDT, the amount due from IDT as of the date of the Spin-Off of $2.1 million was forgiven.

The Company entered into various agreements with IDT prior to the Spin-Off including a Separation and Distribution Agreement to effect the separation and provide a framework for the Company’s relationship with IDT after the Spin-Off, and a Transition Services Agreement, which provides for certain services to be performed by the Company and IDT to facilitate the Company’s transition into a separate publicly-traded company. These agreements provide for, among other things, (1) the allocation between the Company and IDT of employee benefits, taxes and other liabilities and obligations attributable to periods prior to the Spin-Off, (2) transitional services to be provided by IDT relating to human resources and employee benefits administration, (3) the allocation of responsibilities relating to employee compensation and benefit plans and programs and other related matters, (4) finance, accounting, tax, internal audit, facilities, investor relations and legal services to be provided by IDT to the Company following the Spin-Off and (5) specified administrative services to be provided by the Company to certain of IDT’s foreign subsidiaries.

In addition, the Company entered into a Tax Separation Agreement with IDT, which sets forth the responsibilities of the Company and IDT with respect to, among other things, liabilities for federal, state, local and foreign taxes for periods before and including the Spin-Off, the preparation and filing of tax returns for such periods and disputes with taxing authorities regarding taxes for such periods. Pursuant to the Tax Separation Agreement, among other things, IDT indemnifies the Company from all liability for taxes of IDT with respect to any taxable period, and the Company indemnifies IDT from all liability for taxes of the Company with respect to any taxable period, including, without limitation, the ongoing tax audits related to the Company’s business.

Basis of Accounting and Consolidation

'

Basis of Accounting and Consolidation

For the periods prior to the Spin-Off, direct expenses historically incurred by IDT on behalf of the Company are reflected in these financial statements. The most significant expenses are as follows: Facility costs as well as certain salaries consisting of payroll, human resources, purchasing, accounts payable, treasury, network and telephone services, legal, travel, and consulting fees were allocated to the Company based on estimates of the incremental cost incurred by IDT. Medical and dental benefits were allocated to the Company based on rates similar to COBRA health benefit provision rates charged to former IDT employees. Stock-based compensation and retirement benefits under the defined contribution plan were allocated to the Company based on specific identification. Insurance was allocated to these entities based on a combination of headcount and specific policy identification. The assets and liabilities in these financial statements are recorded at historical cost. Management believes that the assumptions and methods of allocation used are reasonable. However, the costs as allocated are not necessarily indicative of the costs that would have been incurred if the Company operated on a stand-alone basis. Therefore, for the periods prior to the Spin-Off, the consolidated financial statements included herein may not necessarily be indicative of the results of operations, changes in equity and cash flows of the Company had the Company been a separate stand-alone entity during the periods prior to the Spin-Off.

The method of accounting applied to long-term investments, whether consolidated, equity or cost, involves an evaluation of the significant terms of each investment that explicitly grant or suggest evidence of control or influence over the operations of the investee and also includes the identification of any variable interests in which the Company is the primary beneficiary. The consolidated financial statements include the Company’s controlled subsidiaries and variable interest entities where the Company is the primary beneficiary (see Note 12). All significant intercompany accounts and transactions between the consolidated entities are eliminated.

Unaudited Financial Statements

'

Unaudited Financial Statements

The accompanying consolidated statements of operations, comprehensive income, and cash flows for the five months ended December 31, 2010 are unaudited. These unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). In management’s opinion, the unaudited consolidated financial statements have been prepared on the same basis as the audited financial statements and include all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s consolidated results of operations and cash flows for the five months ended December 31, 2010.

Accounting for Investments

'

Accounting for Investments

Investments in businesses that the Company does not control, but in which the Company has the ability to exercise significant influence over operating and financial matters, are accounted for using the equity method. The Company’s investment in AMSO, LLC is accounted for using the equity method. The Company periodically evaluates its equity method investment for impairment due to declines considered to be other than temporary. If the Company determines that a decline in fair value is other than temporary, then a charge to earnings would be recorded, and a new basis in the investment is established.

Use of Estimates

'

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimates.

Revenue Recognition

'

Revenue Recognition

Revenues from IDT Energy’s sale of electricity and natural gas are recognized under the accrual method based on deliveries of electricity and natural gas to customers. Revenues from electricity and natural gas delivered but not yet billed are estimated and recorded as accounts receivable. Cash received in advance from customers under billing arrangement is reported as deferred revenue and is included in “Advances from customers” in the accompanying consolidated balance sheets. Genie Oil and Gas does not yet generate revenues.

Direct Cost of Revenues

'

Direct Cost of Revenues

Direct cost of revenues for IDT Energy consists primarily of the cost of natural gas and electricity sold, and also includes scheduling costs, Independent System Operator fees, pipeline costs and utility service charges. In addition, the changes in the fair value of IDT Energy’s futures contracts, swaps and put and call options are recorded in direct cost of revenues. Genie Oil and Gas does not yet incur direct cost of revenues as primarily all of its expenses are classified as research and development.

Research and Development Costs

'

Research and Development Costs

Research and development costs are incurred primarily by IEI, Afek and Genie Mongolia. Costs for research and development are charged to expense as incurred.

Cash and Cash Equivalents

'

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Marketable Securities

'

Marketable Securities

The Company classified its investments in marketable securities as “available-for-sale.” Available-for-sale securities are required to be carried at their fair value, with unrealized gains and losses (net of income taxes) that are considered temporary in nature recorded in “Accumulated other comprehensive income” in the accompanying consolidated balance sheets. The Company uses the specific identification method in computing the gross realized gains and gross realized losses on the maturities and sales of marketable securities. The Company periodically evaluated its investments in marketable securities for impairment due to declines in market value considered to be other than temporary. Such impairment evaluations included, in addition to persistent, declining market prices, general economic and Company-specific evaluations. If the Company determined that a decline in market value is other than temporary, then a charge to operations is recorded in “Other (expense) income, net” in the accompanying consolidated statements of operations and a new cost basis in the investment is established.

Inventory

'

Inventory

Inventory consists of natural gas, which is stored at various third parties’ underground storage facilities. Inventory is valued at a weighted average cost. The cost is based on the purchase price of the natural gas and the cost to transport, plus or minus injections or withdrawals.

Property and Equipment

'

Property and Equipment

Computer software and development, computers and computer hardware, laboratory equipment and office equipment and other are recorded at cost and are depreciated on a straight-line basis over their estimated useful lives, which range as follows: computer software and development—2, 3 or 5 years; computers and computer hardware—5 years, laboratory equipment 7 years, and office equipment and other —5 or 7 years. Leasehold improvements included in office equipment and other are recorded at cost and are depreciated on a straight-line basis over the term of their lease or their estimated useful lives, whichever is shorter.

Long-Lived Assets

'

Long-Lived Assets

The Company tests the recoverability of its long-lived assets with finite useful lives whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The Company tests the recoverability based on the projected undiscounted cash flows to be derived from such asset. If the projected undiscounted future cash flows are less than the carrying value of the asset, the Company will record an impairment loss based on the difference between the estimated fair value and the carrying value of the asset. The Company generally measures fair value by considering sale prices for similar assets or by discounting estimated future cash flows from such asset using an appropriate discount rate. Cash flow projections and fair value estimates require significant estimates and assumptions by management. Should the estimates and assumptions prove to be incorrect, the Company may be required to record impairments in future periods and such impairments could be material.

Goodwill and Indefinite Lived Intangible Assets

'

Goodwill and Indefinite Lived Intangible Assets

Goodwill is the excess of the acquisition cost of businesses over the fair value of the identifiable net assets acquired. Goodwill and other indefinite lived intangible assets are not amortized. These assets are reviewed annually (or more frequently under various conditions) for impairment using a fair value approach. The goodwill impairment assessment involves estimating the fair value of the reporting unit and comparing it to its carrying amount, which is known as Step 1. If the carrying value of the reporting unit exceeds its estimated fair value, Step 2 is performed to determine if an impairment of goodwill is required. The fair value of the reporting unit is estimated using discounted cash flow methodologies, as well as considering third party market value indicators. Goodwill impairment is measured by the excess of the carrying amount of the reporting unit’s goodwill over its implied fair value. Calculating the fair value of the reporting units, and allocating the estimated fair value to all of the tangible assets, intangible assets and liabilities, requires significant estimates and assumptions by management. Should the estimates and assumptions regarding the fair value of the reporting units prove to be incorrect, the Company may be required to record impairments to its goodwill in future periods and such impairments could be material.

The Company has the option to perform a qualitative assessment to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. However, the Company may elect to perform the two-step quantitative goodwill impairment test even if no indications of a potential impairment exist.

For the impairment test of the Company’s indefinite-lived intangible assets, a quantitative impairment test is only necessary if the Company determines that it is more likely than not that an indefinite-lived intangible asset is impaired based on an assessment of certain qualitative factors.

Derivative Instruments and Hedging Activities

'

Derivative Instruments and Hedging Activities

The Company records its derivatives instruments at their respective fair values. The accounting for changes in the fair value (that is, gains or losses) of a derivative instrument is dependent upon whether the derivative has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship.

Due to the volatility of electricity and natural gas prices, IDT Energy enters into futures contracts, swaps and put and call options as hedges against unfavorable fluctuations in market prices of electricity and natural gas and to reduce exposure from price fluctuations. The futures contracts, swaps and put and call options are recorded at fair value as a current asset or liability and any changes in fair value are recorded in “Direct cost of revenues” in the consolidated statements of operations.

In addition to the above, IDT Energy utilizes forward physical delivery contracts for a portion of its purchases of electricity and natural gas, which are defined as commodity derivative contracts. Using the exemption available for qualifying contracts, IDT Energy applies the normal purchase and normal sale accounting treatment to its forward physical delivery contracts, thereby these contracts are not adjusted to fair value. Accordingly, IDT Energy recognizes revenue from customer sales, and the related direct cost of revenues at the contracted price, as electricity and natural gas is delivered to retail customers.

Repairs and Maintenance

'

Repairs and Maintenance

The Company charges the cost of repairs and maintenance, including the cost of replacing minor items not constituting substantial betterment, to selling, general and administrative expenses as these costs are incurred.

Foreign Currency Translation

'

Foreign Currency Translation

Assets and liabilities of foreign subsidiaries denominated in foreign currencies are translated to U.S. Dollars at end-of-period rates of exchange, and their monthly results of operations are translated to U.S. Dollars at the average rates of exchange for that month. Gains or losses resulting from such foreign currency translations are recorded in “Accumulated other comprehensive income” in the accompanying consolidated balance sheets. Foreign currency transaction gains and losses are reported in “Other (expense) income, net” in the accompanying consolidated statements of operations.

Advertising Expense

'

Advertising Expense

Cost of advertising and commissions for customer acquisitions are charged to selling, general and administrative expenses in the period in which it is incurred. Most of the advertisements are in print, over the radio, or direct mail. In the years ended December 31, 2013 and 2012, the year ended July 31, 2011, and the five months ended December 31, 2011 and 2010 (unaudited), advertising expense included in selling, general and administrative expense was $0.2 million, $0.8 million, $1.6 million, $0.3 million and $0.4 million, respectively.

Income Taxes

'

Income Taxes

For the periods prior to the Spin-Off, the accompanying financial statements include provisions for federal, state and foreign income taxes on a separate tax return basis.

The Company recognizes deferred tax assets and liabilities for the future tax consequences attributable to temporary differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the period in which related temporary differences become deductible. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in its assessment of a valuation allowance. Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date of such change.

The Company uses a two-step approach for recognizing and measuring tax benefits taken or expected to be taken in a tax return. The Company determines whether it is more-likely-than-not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. In evaluating whether a tax position has met the more-likely-than-not recognition threshold, the Company presumes that the position will be examined by the appropriate taxing authority that has full knowledge of all relevant information. Tax positions that meet the more-likely-than-not recognition threshold are measured to determine the amount of tax benefit to recognize in the financial statements. The tax position is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Differences between tax positions taken in a tax return and amounts recognized in the financial statements will generally result in one or more of the following: an increase in a liability for income taxes payable, a reduction of an income tax refund receivable, a reduction in a deferred tax asset, or an increase in a deferred tax liability.

The Company classifies interest and penalties on income taxes as a component of income tax expense.

Contingencies

'

Contingencies

The Company accrues for loss contingencies when both (a) information available prior to issuance of the financial statements indicates that it is probable that a liability had been incurred at the date of the financial statements and (b) the amount of loss can reasonably be estimated. When the Company accrues for loss contingencies and the reasonable estimate of the loss is within a range, the Company records its best estimate within the range. When no amount within the range is a better estimate than any other amount, the Company accrues the minimum amount in the range. The Company discloses an estimated possible loss or a range of loss when it is at least reasonably possible that a loss may have been incurred.

Earnings Per Share

'

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 determined 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 earnings per share for the periods prior to the Spin-Off were calculated as if the number of shares outstanding at the Spin-Off were outstanding during those periods.

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:

(in thousands)

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31,

ended

July 31,

ended

2013

2012

December 31,

2011

December 31,

2011

2010

(Unaudited)

Basic weighted-average number of shares

19,668

20,687

20,366

20,365

20,365

Effect of dilutive securities:

Non-vested restricted Class B common stock

—

—

2,131

1,977

1,977

Diluted weighted-average number of shares

19,668

20,687

22,497

22,342

22,342

The following shares were excluded from the diluted earnings per share computations because their inclusion would have been anti-dilutive:

(in thousands)

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31,

ended

July 31,

ended

2013

2012

December 31,

2011

December 31,

2011

2010

(Unaudited)

Stock options

3,443

457

—

—

—

Non-vested restricted Class B common stock

265

1,896

—

—

—

Shares excluded from the calculation of diluted earnings per share

3,708

2,353

—

—

—

The diluted loss per share equals basic loss per share in the years ended December 31, 2013 and 2012 because the Company had a net loss and the impact of the assumed exercise of stock options and vesting of restricted stock would have been anti-dilutive.

An entity affiliated with Lord (Jacob) Rothschild has a one-time option through November 12, 2017 to exchange its GOGAS shares for shares of the Company with equal fair value as determined by the parties (see Note 10). The number of shares issuable in such an exchange is not currently determinable. If this option is exercised, the shares issued by the Company may dilute the earnings per share in future periods.

An employee of the Company, pursuant to the terms of his employment agreement, has the option to exchange his equity interests in IEI, Afek, Genie Mongolia and any equity interest that he may acquire in other entities that the Company may create, for shares of the Company. Employees and directors of the Company that were previously granted restricted stock of IEI have the right to exchange the restricted stock of IEI, upon vesting of such shares, into shares of the Company’s Class B common stock. In addition, IDT Energy has the right to exchange the deferred stock units it previously granted to employees and directors of the Company, upon vesting of such units, into shares of the Company’s Class B common stock or to redeem the units for cash. These exchanges, if elected, would be based on the relative fair value of the shares exchanged. The number of shares of the Company’s stock issuable in an exchange is not currently determinable. If shares of the Company’s stock are issued upon such exchange, the Company’s earnings per share may be diluted in future periods.

Stock-Based Compensation

'

Stock-Based Compensation

The Company recognizes compensation expense for grants of stock-based awards to its employees based on the estimated fair value on the grant date. Stock based awards granted to nonemployees are marked-to-market until the vesting of the award. Compensation cost for awards is recognized using the straight-line method over the vesting period. Stock-based compensation is included in selling, general and administrative expense.

Vulnerability Due to Certain Concentrations

'

Vulnerability Due to Certain Concentrations

Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash, cash equivalents, restricted cash, certificates of deposit and trade accounts receivable. The Company holds cash, cash equivalents, restricted cash and certificates of deposit at several major financial institutions, which may exceed FDIC insured limits. Historically, the Company has not experienced any losses due to such concentration of credit risk. The Company’s temporary cash investments policy is to limit the dollar amount of investments with any one financial institution and monitor the credit ratings of those institutions. While the Company may be exposed to credit losses due to the nonperformance of the holders of its deposits, the Company does not expect the settlement of these transactions to have a material effect on its results of operations, cash flows or financial condition.

IDT Energy reduces its credit risk by participating in purchase of receivable programs for a majority of its receivables. In addition to providing billing and collection services, utility companies purchase IDT Energy’s receivables and assume all credit risk without recourse to IDT Energy. IDT Energy’s primary credit risk is therefore nonpayment by the utility companies. Certain of the utility companies represent significant portions of the Company’s consolidated revenues and consolidated gross trade accounts receivable balance and such concentrations increase the Company’s risk associated with nonpayment by those utility companies.

The following table summarizes the percentage of consolidated revenues from customers by utility company that equal or exceed 10% of consolidated revenues in the period (no other single utility company accounted for more than 10% of consolidated revenues in any of the periods):

Year ended

Year ended

Five Months

Year ended

Five Months

December 31,

December 31,

ended

July 31,

ended

2013

2012

December 31,

2011

December 31,

2011

2010

(Unaudited)

Con Edison

25

%

34

%

52

%

47

%

55

%

West Penn Power

11

%

na

na

na

na

National Grid USA

10

%

na

14

%

17

%

16

%

Penelec

10

%

na

na

na

na

National Grid dba Keyspan

na

na

na

10

%

na

na-less than 10% of consolidated revenue in the period

The following table summarizes the percentage of consolidated gross trade accounts receivable by utility company that equal or exceed 10% of consolidated gross trade accounts receivable at December 31, 2013 and 2012:

December 31

2013

2012

Con Edison

23

%

19

%

West Penn Power

13

%

na

Penelec

12

%

10

%

na-less than 10% of consolidated gross trade accounts receivable at December 31, 2013 or 2012

Allowance for Doubtful Accounts

'

Allowance for Doubtful Accounts

The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The allowance is determined based on known troubled accounts, historical experience and other currently available evidence. Doubtful accounts are written-off upon final determination that the trade accounts will not be collected. The change in the allowance for doubtful accounts was as follows:

(in thousands)

Balance at

Additions

Deductions(1)

Balance at

beginning of

charged to

end of period

period

costs and

expenses

Year ended December 31, 2013

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

800

$

—

$

930

Year ended December 31, 2012

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

—

$

—

$

130

Five months ended December 31, 2011

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

130

$

—

$

—

$

130

Year ended July 31, 2011

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

170

$

66

$

(106

)

$

130

Five months ended December 31, 2010 (unaudited)

Reserves deducted from accounts receivable:

Allowance for doubtful accounts

$

170

$

66

$

(106

)

$

130

(1) Uncollectible accounts written off.

Fair Value Measurements

'

Fair Value Measurements

Fair value of financial and non-financial assets and liabilities is defined as an exit price, which is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three-tier hierarchy for inputs used to measure fair value, which prioritizes the inputs to valuation techniques used to measure fair value, is as follows:

Level 1 –

quoted prices (unadjusted) in active markets for identical assets or liabilities.

Level 2 –

quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 –

unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value.

A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of the assets and liabilities being measured and their placement within the fair value hierarchy.

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Description of Business and Summary of Significant Accounting Policies [Abstract]	'
Weighted-average number of shares used in the calculation of basic and diluted earnings per share	'
	(in thousands)	Year ended			Year ended			Five Months ended December 31,			Year ended			Five Months ended December 31, 2010
		December 31,			December 31,			2011			July 31,			(Unaudited)
		2013			2012						2011
	Basic weighted-average number of shares		19,668			20,687			20,366			20,365			20,365
	Effect of dilutive securities:
	Non-vested restricted Class B common stock		—			—			2,131			1,977			1,977
	Diluted weighted-average number of shares		19,668			20,687			22,497			22,342			22,342
Schedule of antidilutive shares excluded from computation of earnings per share	'
	n thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Stock options		3,443			457			—			—			—
	Non-vested restricted Class B common stock		265			1,896			—			—			—
	Shares excluded from the calculation of diluted earnings per share		3,708			2,353			—			—			—
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'
	The following table summarizes the percentage of consolidated revenues from customers by utility company that equal or exceed 10% of consolidated revenues in the period (no other single utility company accounted for more than 10% of consolidated revenues in any of the periods):
		Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Con Edison		25	%		34	%		52	%		47	%		55	%
	West Penn Power		11	%	na			na			na			na
	National Grid USA		10	%	na				14	%		17	%		16	%
	Penelec		10	%	na			na			na			na
	National Grid dba Keyspan	na			na			na				10	%	na
	na-less than 10% of consolidated revenue in the period
	The following table summarizes the percentage of consolidated gross trade accounts receivable by utility company that equal or exceed 10% of consolidated gross trade accounts receivable at December 31, 2013 and 2012:
	December 31	2013			2012
	Con Edison		23	%		19	%
	West Penn Power		13	%	na
	Penelec		12	%		10	%
	na-less than 10% of consolidated gross trade accounts receivable at December 31, 2013 or 2012
Change in the allowance for doubtful accounts	'
	(in thousands)	Balance at			Additions			Deductions(1)			Balance at
		beginning of			charged to						end of period
		period			costs and
					expenses
	Year ended December 31, 2013
	Reserves deducted from accounts receivable:
	Allowance for doubtful accounts	$	130		$	800		$	—		$	930
	Year ended December 31, 2012
	Reserves deducted from accounts receivable:
	Allowance for doubtful accounts	$	130		$	—		$	—		$	130
	Five months ended December 31, 2011
	Reserves deducted from accounts receivable:
	Allowance for doubtful accounts	$	130		$	—		$	—		$	130
	Year ended July 31, 2011
	Reserves deducted from accounts receivable:
	Allowance for doubtful accounts	$	170		$	66		$	(106	)	$	130
	Five months ended December 31, 2010 (unaudited)
	Reserves deducted from accounts receivable:
	Allowance for doubtful accounts	$	170		$	66		$	(106	)	$	130
	(1) Uncollectible accounts written off.

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2013
Acquisitions [Abstract]	'
Schedule of the impact of acquisitions' purchase price allocations	'
	(in thousands)
	Trade accounts receivable	$	114
	Goodwill		3,686
	Trade accounts payable		(176	)
	Advances from customers		(377	)
	Net assets acquired	$	3,247
	Supplemental information:
	Cash paid	$	779
	Cash acquired		(7	)
	Cash paid, net of cash acquired		772
	Deferred cash payments to be paid by June 2015		1,225
	Contingent payments		1,250
	Total consideration, net of cash acquired	$	3,247
Schedule of reconciling change in carrying amount of goodwill	'
	Balance at July 31, 2011	$	3,663
	Change in carrying amount		—
	Balance at December 31, 2011		3,663
	Change in carrying amount		—
	Balance at December 31, 2012		3,663
	Acquisitions		3,686
	Balance at December 31, 2013	$	7,349
Schedule of pro forma information	'
		Year ended			Year ended
		December 31,			December 31,
		2013			2012
	Revenues	$	280,121		$	229,936
	Net loss	$	(6,015	)	$	(3,282	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Measurements [Abstract]	'
Balance of assets and liabilities measured at fair value on a recurring basis	'
	The following table presents the balance of assets and liabilities at December 31, 2013 measured at fair value on a recurring basis:
	(in thousands)	Level 1 (1)			Level 2 (2)		Level 3 (3)			Total
	Assets:
	Derivative contracts	$	390		$	1,230	$	62		$	1,682
	Liabilities:
	Derivative contracts	$	13		$	372	$	—		$	385
	The following table presents the balance of assets and liabilities at December 31, 2012 measured at fair value on a recurring basis:
	(in thousands)	Level 1 (1)			Level 2 (2)		Level 3 (3)			Total
	Assets:
	Corporate debt securities	$	925		$	9,560	$	—		$	10,485
	Derivative contracts		—			308		—			308
	Total	$	925		$	9,868	$	—		$	10,793
	Liabilities:
	Derivative contracts	$	—		$	152	$	—		$	152
	(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
Summary of the change in the balance of the Company's assets measured at fair value on a recurring basis using significant unobservable inputs	'
	(in thousands)	Year ended			Year ended		Five Months			Year ended			Five Months
		December 31,			December 31,		ended			July 31,			ended
		2013			2012		December 31,			2011			December 31,
							2011						2010
													(Unaudited)
	Balance, beginning of period	$	—		$	—	$	—		$	—		$	—
	Total gains (losses) (realized or unrealized) included in earnings in “Direct cost of revenues”		(142	)
	Purchases, sales, issuances and settlements:
	Purchases		359			—		—			—			—
	Settlement		(155	)		—		—			—			—
	Balance, end of period	$	62		$	—	$	—		$	—		$	—
	The amount of total gains  for the period included in earnings in “Direct cost of revenues” attributable to the change in unrealized gains or losses relating to assets held at the end of the period	$	62		$	—	$	—		$	—		$	—
Summary of the change in the balance of the Company's liabilities measured at fair value on a recurring basis using significant unobservable inputs	'
	(in thousands)	Year ended			Year ended		Five Months			Year ended			Five Months
		December 31,			December 31,		ended			July 31,			ended
		2013			2012		December 31,			2011			December 31,
							2011						2010
													(Unaudited)
	Balance, beginning of period	$	—		$	—	$	(101	)	$	(200	)	$	(200	)
	Total gains (losses) (realized or unrealized):
	Included in earnings in “Direct cost of revenues”		—			—		—			—			—
	Included in earnings in “Other (expense) income, net”		—			—		60			(86	)		(280	)
	Included in earnings in “Selling, general and administrative expense”		—			—		41			(41	)		(500	)
	Purchases, sales, issuances and settlements:
	Settlement		—			—		—			226			—
	Balance, end of period	$	—		$	—	$	—		$	(101	)	$	(980	)
	The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses relating to liabilities still held at the end of the period:
	Included in earnings in “Direct cost of revenues”	$	—		$	—	$	—		$	—		$	—
	Included in earnings in “Other (expense) income, net”	$	—		$	—	$	60		$	—		$	(280	)
	Included in earnings in “Selling, general and administrative expense”	$	—		$	—	$	—		$	(41	)	$	(500	)

Derivative_Instruments_Tables

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Instruments [Abstract]	'
Summarized volume of IDT Energy's outstanding	'
	Commodity		Settlement Dates		Volume
	Electricity		Jan-14		35,200 MWh
	Electricity		Feb-14		72,000 MWh
	Electricity		Jul-14		52,800 MWh
	Electricity		Aug-14		50,400 MWh
	Electricity		Sep-14		16,800 MWh
	Natural gas		Jan-14		625,000 Dth
	Natural gas		Feb-14		1,345,000 Dth
	Natural gas		Mar-14		225,000 Dth
	Natural gas		Jul-14		77,500 Dth
Schedule of fair value of outstanding derivative instruments recorded as assets and liability	'
	December 31			2013		2012
	(in thousands)
	Asset Derivatives	Balance Sheet Location
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current assets		$	1,682	$	308
	December 31			2013		2012
	(in thousands)
	Liability Derivatives	Balance Sheet Location
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current liabilities		$	385	$	152
Effects of derivative instruments on the consolidated statements of operations	'
				Amount of Gain (Loss) Recognized on Derivatives
	(in thousands)			Year ended		Year ended			Five Months			Year ended			Five Months
				December 31,		December 31,			ended			July 31,			ended
				2013		2012			December 31,			2011			December 31,
									2011						2010
															(Unaudited)
		Location of Gain (Loss) Recognized on Derivatives
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Direct cost of revenues		$	1,177	$	(258	)	$	(1,326	)	$	151		$	104
	GOGAS warrants	Selling, general and administrative expense			—		—			41			(41	)		—
	GOGAS stock option	Other (expense) income, net			—		—			60			(86	)		—
	GEIC stock option	Other (expense) income, net			—		—			—			—			(280	)
	Total			$	1,177	$	(258	)	$	(1,225	)	$	24		$	(176	)

Marketable_Securities_Tables

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Summary of marketable securities	'
	(in thousands)	Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	Available-for-sale securities:
	December 31, 2013:
	Marketable securities	$	—	$	—	$	—		$	—
	December 31, 2012:
	Corporate debt securities	$	10,500	$	35	$	(50	)	$	10,485
Summary of Available-for-sale securities in unrealized loss position for other-than-temporary impairments	'
	(in thousands)	Unrealized		Fair Value
		Losses
	December 31, 2012:
	Corporate debt securities	$	50	$	2,500

Investment_in_American_Shale_O1

Investment in American Shale Oil, LLC (Tables)	12 Months Ended
	Dec. 31, 2013
Investment In American Shale Oil, Llc [Abstract]	'
Summary in the change in balance of the Company's investment in AMSO, LLC	'
	(in thousands)	Year ended			Year ended			Five Months ended			Year ended
		December 31,			December 31,			December 31,			July 31,
		2013			2012			2011			2011
	Balance, beginning of period	$	242		$	(685	)	$	(630	)	$	665
	Capital contributions		2,700			4,102			2,040			3,943
	Equity in net loss of AMSO, LLC		(3,194	)		(3,175	)		(2,095	)		(5,238	)
	Balance, end of period	$	(252	)	$	242		$	(685	)	$	(630	)
Maximum exposure to additional loss	'
	(in thousands)
	AMSO’s committed investment in AMSO, LLC based on the 2014 budget	$	3,247
	Less: cumulative capital contributions to AMSO, LLC		—
	Less: liability for equity loss in AMSO, LLC at December 31, 2013		(252	)
	Maximum exposure to additional loss	$	2,995
Summarized balance sheets of AMSO, LLC	'
	December 31	2013			2012
	(in thousands)
	ASSETS
	Cash and cash equivalents	$	883		$	2,171
	Other current assets		141			69
	Equipment, net		36			53
	Other assets		—			805
	TOTAL ASSETS	$	1,060		$	3,098
	LIABILITIES AND MEMBERS’ INTERESTS
	Current liabilities	$	1,024		$	1,649
	Other liabilities		644			644
	Members’ interests		(608	)		805
	TOTAL LIABILITIES AND MEMBERS’ INTERESTS	$	1,060		$	3,098
Summarized statements of operations AMSO, LLC	'
	(in thousands)	Year ended			Year ended			Five Months ended December 31,			Year ended			Five Months ended December 31, 2010
		December 31,			December 31,			2011			July 31,			(Unaudited)
		2013			2012						2011
	REVENUES	$	—		$	—		$	—		$	—		$	—
	OPERATING EXPENSES:
	General and administrative		566			507			248			767			336
	Research and development		8,601			8,563			9,156			25,423			7,955
	TOTAL OPERATING EXPENSES		9,167			9,070			9,404			26,190			8,291
	Loss from operations		(9,167	)		(9,070	)		(9,404	)		(26,190	)		(8,291	)
	Other income (expense)		41			—			—			(1	)		—
	NET LOSS	$	(9,126	)	$	(9,070	)	$	(9,404	)	$	(26,191	)	$	(8,291	)

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property and Equipment [Abstract]	'
Schedule of property and equipment	'
	December 31	2013			2012
	(in thousands)
	Computer software and development	$	516		$	340
	Computers and computer hardware		264			220
	Laboratory equipment		411			383
	Office equipment and other		228			237
			1,419			1,180
	Less accumulated depreciation		(858	)		(771	)
	Property and equipment, net	$	561		$	409

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Components of (loss) income before income taxes	'
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Domestic	$	9,467		$	10,544		$	2,603		$	13,310		$	7,721
	Foreign		(12,053	)		(10,149	)		(2,255	)		(8,920	)		(2,624	)
	(LOSS) INCOME BEFORE INCOME TAXES	$	(2,586	)	$	395		$	348		$	4,390		$	5,097
Components of deferred income tax assets	'
	December 31	2013			2012
	(in thousands)
	Deferred income tax assets:
	Bad debt reserve	$	381		$	54
	Accrued expenses		3,454			2,330
	State taxes		56			359
	Charitable contributions		219			71
	Net operating loss		9,534			7,084
	Stock options and restricted stock		2,793			1,464
	Depreciation		1,056			1,098
	Total deferred income tax assets		17,493			12,460
	Valuation allowance		(16,653	)		(11,861	)
	DEFERRED INCOME TAX ASSETS, NET	$	840		$	599
Components of income taxes provision	'
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Current:
	Federal	$	1,112		$	—		$	392		$	4,869		$	3,191
	State and local		1,891			(1,312	)		735			2,760			990
	Foreign		(7	)		—			—			—			—
			2,996			(1,312	)		1,127			7,629			4,181
	Deferred:
	Federal		—			3,773			(392	)		(198	)		—
	State and local		(241	)		469			(119	)		(486	)		—
	Foreign		—			—			—			—			—
			(241	)		4,242			(511	)		(684	)		—
	PROVISION FOR INCOME TAXES	$	2,755		$	2,930		$	616		$	6,945		$	4,181
Schedule of income tax reconciliation	'
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	U.S. federal income tax at statutory rate	$	(904	)	$	138		$	122		$	1,537		$	1,784
	Valuation allowance		2,447			4,711			—			—			—
	Foreign tax rate differential		48			41			74			3,122			918
	Other		66			4			20			804			835
	State and local income tax, net of federal benefit		1,098			(1,964	)		400			1,482			644
	PROVISION FOR INCOME TAXES	$	2,755		$	2,930		$	616		$	6,945		$	4,181
Summary of change in the valuation allowance for deferred income taxes	'
	(in thousands)	Balance at			Additions			Deductions			Balance at
		beginning of			charged to						end of period
		period			costs and
					expenses
	Year ended December 31, 2013
	Reserves for valuation allowances deducted from deferred income taxes, net	$	11,861		$	4,792		$	—		$	16,653
	Year ended December 31, 2012
	Reserves for valuation allowances deducted from deferred income taxes, net	$	6,523		$	5,338		$	—		$	11,861
	Five months ended December 31, 2011
	Reserves for valuation allowances deducted from deferred income taxes, net	$	6,522		$	1		$	—		$	6,523
	Year ended July 31, 2011
	Reserves for valuation allowances deducted from deferred income taxes, net	$	4,391		$	2,131		$	—		$	6,522
Summary of change in the balance of unrecognized income tax benefits	'
	(in thousands)	Year ended			Year ended			Five Months			Year ended			Five Months
		December 31,			December 31,			ended			July 31,			ended
		2013			2012			December 31,			2011			December 31,
								2011						2010
														(Unaudited)
	Balance at beginning of period	$	223		$	2,507		$	2,340		$	1,050		$	1,050
	Additions based on tax positions related to the current period		—			89			167			979			90
	Additions for tax positions of prior periods		319			—			—			311			—
	Reductions for tax positions of prior periods		—			—			—			—			—
	Settlements		—			(2,373	)		—			—			—
	Lapses of statutes of limitations		—			—			—			—			—
	Balance at end of period	$	542		$	223		$	2,507		$	2,340		$	1,140

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Stock-Based Compensation [Abstract]	'
Summary of the status of the Company's grants of restricted shares of Class B common stock	'
		Number of			Weighted-
		Non-vested Shares			Average Grant
		(in thousands)			Date Fair
					Value
	Non-vested shares at December 31, 2012		1,898		$	2.7
	Granted		75			9.81
	Vested		(1,708	)		1.92
	Forfeited		—			—
	NON-VESTED SHARES AT DECEMBER 31, 2013		265		$	9.74
Equity compensation plans, Valuation Assumptions	'
		Year ended			Five Months ended December 31,
		December 31,			2011
		2013
	ASSUMPTIONS
	Average risk-free interest rate		2.07	%		1.06-1.62	%
	Expected dividend yield		—			—
	Expected volatility		65.6	%		67.7	%
	Expected term	6.5 years			6.0-7.25 years
Summary of stock option activity	'
		Number of			Weighted-			Weighted-		Aggregate
		Options			Average			Average		Intrinsic Value
		(in thousands)			Exercise			Remaining		(in thousands)
					Price			Contractual
								Term (in  years)
	Outstanding at December 31, 2012		457		$	6.85			8.2	$	114
	Granted		3,000			10.3
	Exercised		(13	)		6.85
	Cancelled / Forfeited		(1	)		6.85
	OUTSTANDING AT DECEMBER 31, 2013		3,443		$	9.86			7.8	$	1,489
	EXERCISABLE AT DECEMBER 31, 2013		126		$	6.85			5.7	$	424

Variable_Interest_Entities_Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2013
Variable Interest Entities [Abstract]	'
Schedule of net income loss and aggregate net funding repaid or provided by company to variable interest entity	'
	(in thousands)	Year ended			Year ended			Five Months ended December 31,			Year ended			Five Months ended December 31, 2010
		December 31,			December 31,			2011			July 31,			(Unaudited)
		2013			2012						2011
	Net income (loss):
	CCE	$	2,080		$	1,857		$	(235	)	$	(2,041	)	$	—
	DAD		(67	)		(327	)		(477	)		(263	)		—
	Tari		52			161			—			(3	)		—
	Aggregate funding repaid to (provided by) the Company, net		4,118			738			(2,529	)		(3,291	)		—
Summarized statements of balance sheets of CCE and DAD	'
	December 31	2013			2012
	(in thousands)
	ASSETS
	Cash and cash equivalents	$	434		$	1,047
	Restricted cash		537			39
	Trade accounts receivable		2,459			4,168
	Prepaid expenses		364			485
	Other current assets		353			519
	Fixed assets, net		—			38
	Other assets		449			493
	TOTAL ASSETS	$	4,596		$	6,789
	LIABILITIES AND NONCONTROLLING INTERESTS
	Current liabilities	$	2,937		$	3,035
	Due to IDT Energy		964			5,082
	Noncontrolling interests		695			(1,328	)
	TOTAL LIABILITIES AND NONCONTROLLING INTERESTS	$	4,596		$	6,789

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Summary of accumulated balances for each classification of other comprehensive income (loss)	'
	(in thousands)	Unrealized			Foreign			Accumulated			Location of (Gain)
		loss on			currency			other			Loss Recognized
		available-for-			translation			comprehensive
		sale securities						income (loss)
	Balance at July 31, 2010	$	—		$	(24	)	$	(24	)
	Other comprehensive income attributable to Genie		—			381			381
	Balance at July 31, 2011		—			357			357
	Other comprehensive loss attributable to Genie		—			(494	)		(494	)
	Balance at December 31, 2011		—			(137	)		(137	)
	Other comprehensive income attributable to Genie		(15	)		422			407
	Balance at December 31, 2012		(15	)		285			270
	Other comprehensive (loss) income before reclassifications		(55	)		460			405
	Amounts reclassified from accumulated other comprehensive income		70			—			70		Interest income
	Net other comprehensive income		15			460			475
	BALANCE AT DECEMBER 31, 2013	$	—		$	745		$	745

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Future minimum payments for operating leases	'
	(in thousands)
	Year ending December 31:
	2014	$	302
	2015		236
	2016		13
	2017		—
	2018		—
	Thereafter		—
	Total payments	$	551

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Summary of related party transactions	'
	(in thousands)	Year ended		Year ended		Five Months		Year ended		Five Months
		December 31,		December 31,		ended		July 31,		ended
		2013		2012		December 31,		2011		December 31,
						2011				2010
										(Unaudited)
	Amount IDT charged the Company:
	Included in “Selling, general and administrative expense”	$	3,348	$	3,775	$	2,578	$	4,694	$	1,837
	Included in “Provision for income taxes”		—		—		1,945		5,736		3,220
	Amount the Company charged IDT		285		129		—		—		—

Business_Segment_Information_T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013
Business Segment Information [Abstract]	'
Operating results for the business segments	'
	(in thousands)	IDT Energy		Genie Oil and Gas			Corporate			Total
	Year ended December 31, 2013
	Revenues	$	279,174	$	—		$	—		$	279,174
	Income (loss) from operations		25,696		(15,955	)		(9,115	)		626
	Depreciation		15		94			1			110
	Research and development		—		11,389			—			11,389
	Equity in the net loss of AMSO, LLC		—		3,194			—			3,194
	Year ended December 31, 2012
	Revenues	$	229,459	$	—		$	—		$	229,459
	Income (loss) from operations		24,972		(14,038	)		(7,887	)		3,047
	Depreciation		40		83			1			124
	Research and development		—		9,365			—			9,365
	Equity in the net loss of AMSO, LLC		—		3,175			—			3,175
	Five Months ended December 31, 2011
	Revenues	$	76,783	$	—		$	—		$	76,783
	Income (loss) from operations		8,907		(5,476	)		(1,703	)		1,728
	Depreciation		15		—			—			15
	Research and development		—		2,648			—			2,648
	Equity in the net loss of AMSO, LLC		—		2,095			—			2,095
	Year ended July 31, 2011
	Revenues	$	196,018	$	—		$	—		$	196,018
	Income (loss) from operations		22,458		(13,641	)		(1,843	)		6,974
	Depreciation		24		—			—			24
	Research and development		—		7,843			—			7,843
	Equity in the net loss of AMSO, LLC		—		5,238			—			5,238
	Five Months ended December 31, 2010 (unaudited)
	Revenues	$	74,877	$	—		$	—		$	74,877
	Income (loss) from operations		11,739		(5,570	)		(613	)		5,556
	Depreciation		11		—			—			11
	Research and development		—		3,045			—			3,045
	Equity in the net loss of AMSO, LLC		—		1,658			—			1,658
Summary of business segment aggregate assets	'
	(in thousands)	IDT Energy		Genie Oil and Gas			Corporate			Total
	Total assets:
	31-Dec-13	$	76,691	$	42,193		$	39,959		$	158,843
	31-Dec-12		65,377		36,561			48,368			150,306
	31-Dec-11		60,483		2,498			87,213			150,194
Schedule of net long-lived assets and total assets held outside of the United States	'
	(in thousands)	United States		Foreign Countries			Total
	December 31, 2013
	Long-lived assets, net	$	352	$	377		$	729
	Total assets		150,315		8,528			158,843
	December 31, 2012
	Long-lived assets, net	$	71	$	346		$	417
	Total assets		142,694		7,612			150,306
	December 31, 2011
	Long-lived assets, net	$	101	$	351		$	452
	Total assets		148,180		2,014			150,194

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Selected Quarterly Financial Data (Unaudited) [Abstract]	'
Schedule of selected quarterly financial data of the company	'
	Quarter Ended	Revenues		Direct cost		Income (loss)			Net (loss) income			Net (loss) income			(Loss) earnings per common share
	(in thousands,			of revenues		from						attributable
	except per share data)					operations						to Genie Energy Ltd.			Basic			Diluted
	2013:00:00
	31-Dec	$	67,071	$	50,237	$	(386	)	$	(1,118	)	$	(483	)	$	(0.04	)	$	(0.04	)
	30-Sep		71,638		51,699		3,948			2,042			1,991			0.09			0.08
	30-Jun		55,134		45,168		(5,569	)		(6,168	)		(5,901	)		(0.32	)		(0.32	)
	March 31 (1)		85,331		66,312		2,633			(97	)		(1,510	)		(0.09	)		(0.09	)
	TOTAL	$	279,174	$	213,416	$	626		$	(5,341	)	$	(5,903	)	$	(0.36	)	$	(0.36	)
	2012:00:00
	December 31 (1)	$	65,403	$	46,936	$	1,891		$	1,060		$	2,008		$	0.09		$	0.08
	30-Sep		63,725		42,285		3,469			(1,084	)		(2,641	)		(0.13	)		(0.13	)
	30-Jun		42,826		31,178		(5,006	)		(3,714	)		(3,252	)		(0.15	)		(0.15	)
	31-Mar		57,505		39,473		2,693			1,203			604			0.03			0.03
	TOTAL	$	229,459	$	159,872	$	3,047		$	(2,535	)	$	(3,281	)	$	(0.17	)	$	(0.17	)

Description_of_Business_and_Su3

Description of Business and Summary of Significant Accounting Policies (Details)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Weighted average number of shares used in calculation of basic and diluted earnings per share	'	'	'	'	'
Basic weighted-average number of shares	20,366	20,365	19,668	20,687	20,365
Effect of dilutive securities:	'	'	'	'	'
Non-vested restricted Class B common stock	2,131	1,977	'	'	1,977
Diluted weighted-average number of shares	22,497	22,342	19,668	20,687	22,342

Description_of_Business_and_Su4

Description of Business and Summary of Significant Accounting Policies (Details 1)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Antidilutive securities excluded from computation of diluted earnings per share	'	'	'	'	'
Shares excluded from the calculation of diluted earnings per share	'	'	3,708	2,353	'
Stock Option [Member]	'	'	'	'	'
Antidilutive securities excluded from computation of diluted earnings per share	'	'	'	'	'
Shares excluded from the calculation of diluted earnings per share	'	'	3,443	457	'
Non-vested restricted Class B common stock [Member]	'	'	'	'	'
Antidilutive securities excluded from computation of diluted earnings per share	'	'	'	'	'
Shares excluded from the calculation of diluted earnings per share	'	'	265	1,896	'

Description_of_Business_and_Su5

Description of Business and Summary of Significant Accounting Policies (Details 2)	5 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Con Edison [Member] | Consolidated revenues [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	52.00%	55.00%	25.00%	34.00%	47.00%
Con Edison [Member] | Consolidated gross trade accounts receivable [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	23.00%	19.00%	'
West Penn Power [Member] | Consolidated revenues [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	11.00%	'	'
Description for concentration risk percentage	'Less than 10	'Less than 10	'	'Less than 10	'Less than 10
West Penn Power [Member] | Consolidated gross trade accounts receivable [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	13.00%	'	'
Description for concentration risk percentage	'	'	'	'Less than 10	'
National Grid USA [Member] | Consolidated revenues [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	14.00%	16.00%	10.00%	'	17.00%
Description for concentration risk percentage	'	'	'	'Less than 10	'
Penelec [Member] | Consolidated revenues [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	10.00%	'	'
Description for concentration risk percentage	'Less than 10	'Less than 10	'	'Less than 10	'Less than 10
Penelec [Member] | Consolidated gross trade accounts receivable [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	12.00%	10.00%	'
National Grid dba Keyspan [Member] | Consolidated revenues [Member]	'	'	'	'	'
Summary of concentration risk percentage of consolidated revenues and consolidated gross trade accounts receivable from utility companies	'	'	'	'	'
Concentration risk percentage, percentage	'	'	'	'	10.00%
Description for concentration risk percentage	'Less than 10	'Less than 10	'Less than 10	'Less than 10	'

Description_of_Business_and_Su6

Description of Business and Summary of Significant Accounting Policies (Details 3) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Reserves deducted from accounts receivable:	'	'	'	'	'
Balance at beginning of period	'	'	$130	$130	'
Additions charged to costs and expenses	'	66	800	'	66
Balance at end of period	130	'	930	130	'
Allowance for Doubtful Accounts [Member]	'	'	'	'	'
Reserves deducted from accounts receivable:	'	'	'	'	'
Balance at beginning of period	130	170	130	130	170
Deductions(1)	'	-106	'	'	-106
Balance at end of period	$130	$130	$930	$130	$130

Description_of_Business_and_Su7

Description of Business and Summary of Significant Accounting Policies (Details Textual) (USD $)	1 Months Ended	5 Months Ended		12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Oct. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011	Oct. 28, 2011
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Description of company spin -off	'	'	'	'Each of IDT's stockholders received: (i) one share of the Company's Class A common stock for every share of IDT's Class A common stock held of record on October 21, 2011 (the "Record Date"), and (ii) one share of the Company's Class B common stock for every share of IDT's Class B common stock held of record on the Record Date.	'	'	'
Proceeds from Contributions from Affiliates	$82.20	'	'	'	'	'	'
Forgiven amount due from IDT	'	'	'	'	'	'	2.1
Amount of advertising expense included in selling general and administrative expense	'	$0.30	$0.40	$0.20	$0.80	$1.60	'
Description of percentage of consolidated revenue from utility companies	'	'	'	'The percentage of consolidated revenues from utility companies that equal or exceed 10% of consolidated revenues in the period (no other single customer accounted for more than 10% of consolidated revenues in any of the periods).	'	'	'
Description of percentage of consolidated gross trade accounts receivable by utility companies	'	'	'	'The percentage of consolidated gross trade accounts receivable by utility company that equal or exceed 10% of consolidated gross trade accounts receivable at December 31, 2012 and 2011.	'	'	'
GOGAS [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	92.00%	'	'	'
Computer software and development [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Estimated Useful Lives	'	'	'	'2, 3 or 5 Years	'	'	'
Computers and computer hardware [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Estimated Useful Lives	'	'	'	'5 Years	'	'	'
Laboratory equipment [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Estimated Useful Lives	'	'	'	'7 Years	'	'	'
Office equipment and other [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Estimated Useful Lives	'	'	'	'5 or 7 Years	'	'	'
Common Stock Class A	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Common stock, shares issued	'	'	'	1,574	1,574	'	1,600
Common stock, shares outstanding	'	'	'	1,574	1,574	'	1,600
Common Stock Class B	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Common stock, shares issued	'	'	'	19,755	19,827	'	21,100
Common stock, shares outstanding	'	'	'	19,696	19,800	'	21,100
IDT Energy [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	100.00%	'	'	'
Ownership interest of company	'	'	'	2.30%	'	'	'
Genie Energy International Corporation [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	99.30%	'	'	'
American Shale Oil L.L.C [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Ownership interest of company	'	'	'	48.16%	'	'	'
Israel Energy Initiatives, Ltd. [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	88.60%	'	'	'
Description of expiration of license	'	'	'	'	'	'	'
				The license expires in July 2014. The license may be extended for one year through July 2015.
Afek Oil and Gas, Ltd. [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	89.00%	'	'	'
Description of expiration of license	'	'	'	'three year	'	'	'
Genie Mongolia [Member]	'	'	'	'	'	'	'
Description of Business and Summary of Significant Accounting Policies (Textual)	'	'	'	'	'	'	'
Company's investment, ownership percentage in subsidiary	'	'	'	90.00%	'	'	'
Description of expiration of license	'	'	'	'five year	'	'	'

Acquisitions_Details

Acquisitions (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013		Dec. 31, 2012	Jul. 31, 2011
Schedule of the impact of acquisitions purchase price allocations	'	'	'		'	'
Trade accounts receivable	'	'	$114		'	'
Goodwill	'	'	3,686		'	'
Trade accounts payable	'	'	-176		'	'
Advances from customers	'	'	-377		'	'
Net assets acquired	'	'	3,247		'	'
Supplemental information:	'	'	'		'	'
Cash paid	'	'	779		'	'
Cash acquired	'	'	-7		'	'
Cash paid, net of cash acquired	'	'	772		'	'
Deferred cash payments to be paid by June 2015 (1)	'	'	1,225	[1]	'	'
Contingent payments (1)	'	'	1,250	[1]	'	'
Total consideration, net of cash acquired	'	'	$3,247		'	'
[1]	(1) The deferred cash payments and the contingent payments are included in other current liabilities and other liabilities in the consolidated balance sheet as of December 31, 2013.

Acquisitions_Details_1

Acquisitions (Details 1) (USD $)	5 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
Schedule of reconciling change in carrying amount of goodwill	'	'	'
Beginning Balance	$3,663	$3,663	$3,663
Change in carrying amount	'	'	'
Acquiistions	'	3,686	'
Ending Balance	$3,663	$7,349	$3,663

Acquisitions_Details_2

Acquisitions (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of pro forma information	'	'
Revenues	$280,121	$229,936
Net loss	($6,015)	($3,282)

Acquisitions_Details_Textual

Acquisitions (Details Textual)	12 Months Ended
	Dec. 31, 2013
Acquisitions (Textual)	'
Percentage of outstanding membership interests	100.00%
Description of contingent payments	'The contingent payments include 100% of the gross profit from each closing customer contract during the remainder of the initial term of such contract and 100% of the gross profit from each post-closing customer contract during the initial term of such contract, plus 25% of the gross profit from the first renewal term of all contracts. A closing customer contract is generally a contract in effect at closing, and a post-closing customer contract is generally a contract that became effective within 60 days following the acquisition.
Closing Customer [Member]	'
Acquisitions (Textual)	'
Percentage of contingent payment on initial term contract	100.00%
Percentage of contingent payment on contract renewal term	25.00%
Post Closing Customer [Member]	'
Acquisitions (Textual)	'
Percentage of contingent payment on initial term contract	100.00%
Percentage of contingent payment on contract renewal term	25.00%

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Recurring [Member], USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'		'
Corporate debt securities	'		$10,485
Derivative contracts	1,682		308
Total	'		10,793
Liabilities:	'		'
Derivative contracts	385		152
Level 1 (1) [Member]	'		'
ASSETS	'		'
Corporate debt securities	'		925	[1]
Derivative contracts	390	[1]	'	[1]
Total	'		925	[1]
Liabilities:	'		'
Derivative contracts	13	[1]	'	[1]
Level 2 (2) [Member]	'		'
ASSETS	'		'
Corporate debt securities	'		9,560	[2]
Derivative contracts	1,230	[2]	308	[2]
Total	'		9,868	[2]
Liabilities:	'		'
Derivative contracts	372	[2]	152	[2]
Level 3 (3) [Member]	'		'
ASSETS	'		'
Corporate debt securities	'		'	[3]
Derivative contracts	62	[3]	'	[3]
Total	'		'	[3]
Liabilities:	'		'
Derivative contracts	'	[3]	'	[3]
[1]	(1) quoted prices in active markets for identical assets or liabilities
[2]	(2) observable inputs other than quoted prices in active markets for identical assets and liabilities
[3]	(3) no observable pricing inputs in the market

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Summary of the change in the balance of the Company's asset measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	'	'	'	'	'
Balance, beginning of period, Assets	'	'	'	'	'
Total gains (losses) (realized or unrealized) included in earnings in "Direct cost of revenues"	'	'	-142	'	'
Purchases, sales, issuances and settlements:	'	'	'	'	'
Purchases	'	'	359	'	'
Settlement	'	'	-155	'	'
Balance, end of period, Assets	'	'	62	'	'
The amount of total gains (losses) for the period included in earnings in "Direct cost of revenues" attributable to the change in unrealized gains or losses relating to assets held at the end of the period	'	'	$62	'	'

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 2) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'	'
Balance, beginning of period	($101)	($200)	'	'	($200)
Purchases, sales, issuances and settlements:	'	'	'	'	'
Settlement	'	'	'	'	226
Balance, end of period	'	-980	'	'	-101
Direct cost of revenues [Member]	'	'	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'	'
Balance, beginning of period	'	'	'	'	'
Total gains (losses) (realized or unrealized):	'	'	'	'	'
Included in earnings in	'	'	'	'	'
Purchases, sales, issuances and settlements:	'	'	'	'	'
Settlement	'	'	'	'	'
Balance, end of period	'	'	'	'	'
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses relating to liabilities still held at the end of the period:	'	'	'	'	'
Included in earnings in	'	'	'	'	'
Selling, General and Administrative Expenses [Member]	'	'	'	'	'
Total gains (losses) (realized or unrealized):	'	'	'	'	'
Included in earnings in	41	-500	'	'	-41
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses relating to liabilities still held at the end of the period:	'	'	'	'	'
Included in earnings in	'	-500	'	'	-41
Other (expense) income, net [Member]	'	'	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'	'
Balance, beginning of period	'	'	'	'	'
Total gains (losses) (realized or unrealized):	'	'	'	'	'
Included in earnings in	60	-280	'	'	-86
Purchases, sales, issuances and settlements:	'	'	'	'	'
Balance, end of period	'	'	'	'	'
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses relating to liabilities still held at the end of the period:	'	'	'	'	'
Included in earnings in	$60	($280)	'	'	'

Fair_Value_Measurements_Detail3

Fair Value Measurements (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011	Nov. 30, 2010	Dec. 31, 2013
In Millions, unless otherwise specified			GOGAS [Member]	GOGAS [Member]	GOGAS [Member]
Fair Value Measurements (Textual)	'	'	'	'	'
Stock option issued, exercise price	'	'	'	'	$5
Fair value of the GOGAS stock option	'	'	'	'	'
Investment options, expiration date	'	'	9-Apr-15	12-Nov-11	'
Financial instrument included in other assets	$0.90	$0.70	'	'	'

Derivative_Instruments_Details

Derivative Instruments (Details)	12 Months Ended
	Dec. 31, 2013
Electricity [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Electricity
Settlement Dates	'January 2014
Volume	'35,200 MWh
Electricity 1 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Electricity
Settlement Dates	'February 2014
Volume	'72,000 MWh
Electricity 2 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Electricity
Settlement Dates	'July 2014
Volume	'52,800 MWh
Electricity 3 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Electricity
Settlement Dates	'August 2014
Volume	'50,400 MWh
Electricity 4 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Electricity
Settlement Dates	'September 2014
Volume	'16,800 MWh
Natural Gas [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Natural gas
Settlement Dates	'January 2014
Volume	'625,000 Dth
Natural Gas 1 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Natural gas
Settlement Dates	'February 2014
Volume	'1,345,000 Dth
Natural Gas 2 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Natural gas
Settlement Dates	'March 2014
Volume	'225,000 Dth
Natural Gas 3 [Member]	'
Summarized volume of IDT Energy's outstanding	'
Commodity	'Natural gas
Settlement Dates	'July 2014
Volume	'77,500 Dth

Derivative_Instruments_Details1

Derivative Instruments (Details 1) (Energy contracts and options [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Other current assets [Member]	'	'
Schedule of fair value of outstanding derivative instruments recorded as assets and liability	'	'
Asset Derivatives, not designated or not qualifying as hedging instruments	$1,682	$308
Other current liabilities [Member]	'	'
Schedule of fair value of outstanding derivative instruments recorded as assets and liability	'	'
Liability Derivatives, not designated or not qualifying as hedging instruments	$385	$152

Derivative_Instruments_Details2

Derivative Instruments (Details 2) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Effects of derivative instruments on the consolidated statements of operations	'	'	'	'	'
Amount of Gain (Loss) Recognized on Derivatives	($1,225)	($176)	$1,177	($258)	$24
Energy contracts and options [Member] | Direct cost of revenues [Member]	'	'	'	'	'
Effects of derivative instruments on the consolidated statements of operations	'	'	'	'	'
Amount of Gain (Loss) Recognized on Derivatives	-1,326	104	1,177	-258	151
GOGAS warrants [Member] | Selling, general and administrative expense [Member]	'	'	'	'	'
Effects of derivative instruments on the consolidated statements of operations	'	'	'	'	'
Amount of Gain (Loss) Recognized on Derivatives	41	'	'	'	-41
GOGAS stock option [Member] | Other (expense) income, net [Member]	'	'	'	'	'
Effects of derivative instruments on the consolidated statements of operations	'	'	'	'	'
Amount of Gain (Loss) Recognized on Derivatives	60	'	'	'	-86
GEIC stock option [Member] | Other (expense) income, net [Member]	'	'	'	'	'
Effects of derivative instruments on the consolidated statements of operations	'	'	'	'	'
Amount of Gain (Loss) Recognized on Derivatives	'	($280)	'	'	'

Derivative_Instruments_Details3

Derivative Instruments (Details Textual) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Nov. 30, 2012	Oct. 31, 2011
Derivative Instruments (Textual)	'	'
Cash deposited with MF Global	'	$1.65
Loss recognized in relation to its cash deposit with MF Global	'	0.45
Cash received from sale of cash deposit with MF Global	0.6	'
Gain recognized from a sale of the amount due from MF Global	$0.30	'

Marketable_Securities_Details

Marketable Securities (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2013
In Thousands, unless otherwise specified		Corporate Debt Securities [Member]	Marketable Securities [Member]
Available-for-sale securities:	'	'	'
Available-for-sale securities, Amortized Cost	'	$10,500	'
Available-for-sale securities, Gross Unrealized Gains	'	35	'
Available-for-sale securities, Gross Unrealized Losses	-50	-50	'
Available-for-sale securities, Fair Value	'	$10,485	'

Marketable_Securities_Details_

Marketable Securities (Details 1) (USD $)	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of Available-for-sale securities in unrealized loss position for other-than-temporary impairments	'
Available-for-sale securities, Gross Unrealized Losses	($50)
Corporate debt securities, Fair Value	$2,500

Marketable_Securities_Details_1

Marketable Securities (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Marketable Securities (Textual)	'	'
Proceeds from sales and maturities of available-for-sale securities	$10.40	$1
Gross realized gains (losses) on available for sale securities	'	'

Investment_in_American_Shale_O2

Investment in American Shale Oil, LLC (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Summary in the change in balance of the Company's investment in AMSO, LLC	'	'	'	'	'
Balance, beginning of period	($630)	$665	$242	($685)	$665
Capital contributions	2,040	2,514	2,700	4,102	3,943
Equity in the net loss of AMSO, LLC	-2,095	-1,658	-3,194	-3,175	-5,238
Balance, end of period	($685)	'	($252)	$242	($630)

Investment_in_American_Shale_O3

Investment in American Shale Oil, LLC (Details 1) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]	'
AMSO's committed investment in AMSO, LLC based on the 2014 budget	$3,247
Less: cumulative capital contributions to AMSO, LLC	'
Less: liability for equity loss in AMSO, LLC	-252
Maximum exposure to additional loss	$2,995

Investment_in_American_Shale_O4

Investment in American Shale Oil, LLC (Details 2) (AMSO, LLC [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
AMSO, LLC [Member]	'	'
ASSETS	'	'
Cash and cash equivalents	$883	$2,171
Other current assets	141	69
Equipment, net	36	53
Other assets	'	805
TOTAL ASSETS	1,060	3,098
LIABILITIES AND MEMBERS' INTERESTS	'	'
Current liabilities	1,024	1,649
Other liabilities	644	644
Members' interests	-608	805
TOTAL LIABILITIES AND MEMBERS' INTERESTS	$1,060	$3,098

Investment_in_American_Shale_O5

Investment in American Shale Oil, LLC (Details 3) (AMSO, LLC [Member], USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
AMSO, LLC [Member]	'	'	'	'	'
Summary statements of operations	'	'	'	'	'
REVENUES	'	'	'	'	'
OPERATING EXPENSES:	'	'	'	'	'
General and administrative	248	336	566	507	767
Research and development	9,156	7,955	8,601	8,563	25,423
TOTAL OPERATING EXPENSES	9,404	8,291	9,167	9,070	26,190
Loss from operations	-9,404	-8,291	-9,167	-9,070	-26,190
Other income (expense)	'	'	41	'	-1
NET LOSS	($9,404)	($8,291)	($9,126)	($9,070)	($26,191)

Investment_in_American_Shale_O6

Investment in American Shale Oil, LLC (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2011	Mar. 31, 2009	Dec. 31, 2013
		AMSO, LLC [Member]	AMSO, LLC [Member]	TOTAL S.A. [Member]	TOTAL S.A. [Member]
		acre
Schedule of investment (Textual)	'	'	'	'	'
Area of land awarded for lease	'	160	'	'	'
Lease expiration period	'	'10 years	'	'	'
Extension period of lease	'	'5 years	'	'	'
Area of land subject to commercial lease	'	5,120	'	'	'
Ownership interest of company in AMSO, LLC	'	50.00%	'	50.00%	50.00%
Capital contributions to AMSO, LLC	'	'	'	$3,200,000	'
Description of ownership exchange transaction	'	'	'	'All owners of equity interests in AMSO, LLC other than AMSO exchanged their ownership interest for a proportionate share of a 1% override on AMSO, LLC's future revenue.	'
Percentage of initial expenditure funded by holding company	'	20.00%	'	'	'
Initial expenditures	'	50,000,000	'	'	'
Percentage of funding provided by holding company for next increased expenditures	'	35.00%	'	'	'
Amount of expenditures to be funded 35% by holding company	'	50,000,000	'	'	'
Percentage of funding for approved expenditures in excess of $100 million	'	50.00%	'	'	'
Expenditures in excess of this amount to be funded 50% by holding company	'	100,000,000	'	'	'
Percentage of funding to AMSO, LLC's for converting research, development and demonstration lease to a commercial lease	'	40.00%	'	'	'
Cumulative contributions of AMSO and Total to AMSO, LLC	'	69,000,000	'	'	'
Percentage of net loss allocated of AMSO, LLC	'	'	20.00%	'	'
Increased percentage of AMSO's portion of net loss in AMSO, LLC	'	'	35.00%	'	'
Budget for period	'	3,200,000	'	'	'
Amount of budget funded by holding company	'	3,200,000	'	'	'
Maximum exposure to additional loss	2,995,000	3,000,000	'	'	'
Amount of expenditures to be funded by holding company not funded	'	900,000	'	'	'
New equity method investment ownership percentage after dilution	'	48.16%	'	'	51.84%
Expenditures in excess of this amount to be funded by holding company dilution percentage	'	100,000,000	'	'	'
New percentage of funding for approved expenditures in excess of $100 million	'	33.70%	'	'	66.30%
Amount of expenditures not allocated to holding company after dilution	'	$2,600,000	'	'	'

Property_and_Equipment_Details

Property and Equipment (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of property and equipment	'	'
Property and equipment	$1,419	$1,180
Less accumulated depreciation	-858	-771
Property and equipment, net	561	409
Computer software and development [Member]	'	'
Schedule of property and equipment	'	'
Property and equipment	516	340
Computers and computer hardware [Member]	'	'
Schedule of property and equipment	'	'
Property and equipment	264	220
Laboratory equipment [Member]	'	'
Schedule of property and equipment	'	'
Property and equipment	411	383
Office equipment and other [Member]	'	'
Schedule of property and equipment	'	'
Property and equipment	$228	$237

Revolving_Line_of_Credit_Detai

Revolving Line of Credit (Details) (USD $)	0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Apr. 23, 2012
Revolving Line of Credit (Textual)	'	'	'	'
Line of credit facility, amount outstanding	'	$5.70	'	'
JPMorgan [Member]	'	'	'	'
Revolving Line of Credit (Textual)	'	'	'	'
Maximum principal amount on revolving line of credit	'	'	'	25
Description of line of credit collateral	'	'Equal to the greater of (a) $10.0 million or (b) the sum of the amount of letters of credit outstanding plus the outstanding principal under the revolving note.	'	'
Maximum amount of collateral under condition one	'	10	'	'
Interest rate description on principal outstanding	'	'Lesser of (a) the LIBOR rate multiplied by the statutory reserve rate established by the Board of Governors of the Federal Reserve System plus 1.0% per annum, or (b) the maximum rate per annum permitted by whichever of applicable federal or Texas laws permit the higher interest rate.	'	'
Quoted margin rate on LIBOR, per annum	'	1.00%	'	'
Extended Maturity Date	30-Apr-14	'	'	'
Quarterly unused commitment fee	'	0.08%	'	'
Line of credit facility, frequency of payment and payment terms	'	'Interest is payable at least every three months and all outstanding principal and any accrued and unpaid interest is due on the maturity date of April 30,2013	'	'
Cash collateral for line of credit	'	10	'	'
Line of credit facility, amount outstanding	'	$5.70	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Income Taxes [Abstract]	'	'	'	'	'
Domestic	$2,603	$7,721	$9,467	$10,544	$13,310
Foreign	-2,255	-2,624	-12,053	-10,149	-8,920
(LOSS) INCOME BEFORE INCOME TAXES	$348	$5,097	($2,586)	$395	$4,390

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jul. 31, 2011	Jul. 31, 2010
In Thousands, unless otherwise specified
Deferred income tax assets:	'	'	'	'	'
Bad debt reserve	$381	$54	'	'	'
Accrued expenses	3,454	2,330	'	'	'
State taxes	56	359	'	'	'
Charitable contributions	219	71	'	'	'
Net operating loss	9,534	7,084	'	'	'
Stock options and restricted stock	2,793	1,464	'	'	'
Depreciation	1,056	1,098	'	'	'
Total deferred income tax assets	17,493	12,460	'	'	'
Valuation allowance	16,653	11,861	6,523	6,522	4,391
DEFERRED INCOME TAX ASSETS, NET	$840	$599	'	'	'

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Current:	'	'	'	'	'
Federal	$392	$3,191	$1,112	'	$4,869
State and local	735	990	1,891	-1,312	2,760
Foreign	'	'	-7	'	'
Total current income taxes	1,127	4,181	2,996	-1,312	7,629
Deferred:	'	'	'	'	'
Federal	-392	'	'	3,773	-198
State and local	-119	'	-241	469	-486
Foreign	'	'	'	'	'
Total current income taxes	-511	'	-241	4,242	-684
PROVISION FOR INCOME TAXES	$616	$4,181	$2,755	$2,930	$6,945

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'	'	'	'	'
U.S. federal income tax at statutory rate	$122	$1,784	($904)	$138	$1,537
Valuation allowance	'	'	2,447	4,711	'
Foreign tax rate differential	74	918	48	41	3,122
Other	20	835	66	4	804
State and local income tax, net of federal benefit	400	644	1,098	-1,964	1,482
PROVISION FOR INCOME TAXES	$616	$4,181	$2,755	$2,930	$6,945

Income_Taxes_Details_4

Income Taxes (Details 4) (USD $)	5 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Summary of change in the valuation allowance for deferred income taxes	'	'	'	'
Balance at beginning of year	$6,522	$11,861	$6,523	$4,391
Additions charged to costs and expenses included in Reserves for valuation allowances deducted from deferred income taxes	1	4,792	5,338	2,131
Reserves for valuation allowances deducted from deferred income taxes deductions	'	'	'	'
Balance at end of year	$6,523	$16,653	$11,861	$6,522

Income_Taxes_Details_5

Income Taxes (Details 5) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Schedule of change in the balance of unrecognized income tax benefits	'	'	'	'	'
Balance at beginning of period	$2,340	$1,050	$223	$2,507	$1,050
Additions based on tax positions related to the current period	167	90	'	89	979
Additions for tax positions of prior periods	'	'	319	'	311
Reductions for tax positions of prior periods	'	'	'	'	'
Settlements	'	'	'	-2,373	'
Lapses of statutes of limitations	'	'	'	'	'
Balance at end of period	$2,507	$1,140	$542	$223	$2,340

Income_Taxes_Details_Textual

Income Taxes (Details Textual) (USD $)	5 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Income Taxes (Textual)	'	'	'	'	'
Recorded interest on income taxes	$0.10	'	'	'	$0.20
Accrued interest on income taxes	'	'	'	'	'
U.S. federal [Member]	'	'	'	'	'
Income Taxes (Textual)	'	'	'	'	'
Net operating loss carryforwards	'	'	4.9	'	'
Operating loss carry forwards expiration period	'	'	'The federal net operating loss carry-forwards will start to expire in 2032, with the year ended December 31, 2013's loss expiring in 2034.	'	'
Income tax reuturns period	'	'	'	'	'
			Fiscal 2009 to calendar 2013.
State [Member]	'	'	'	'	'
Income Taxes (Textual)	'	'	'	'	'
Net operating loss carryforwards	'	'	37.8	'	'
Operating loss carry forwards expiration period	'	'	'The state net operating loss carry-forwards will start to expire in 2028, with the year ended December 31, 2013's loss expiring in 2034.	'	'
Income tax reuturns period	'	'	'Fiscal 2008 to calendar 2013.	'	'
Foreign [Member]	'	'	'	'	'
Income Taxes (Textual)	'	'	'	'	'
Net operating loss carryforwards	'	'	30.1	'	'
Operating loss carry forwards amount no expiration	'	'	$29.90	'	'
Income tax reuturns period	'	'	'Fiscal 2008 to calendar 2013.	'	'

Equity_Details

Equity (Details) (USD $)

0 Months Ended

5 Months Ended

12 Months Ended

1 Months Ended

5 Months Ended

12 Months Ended

1 Months Ended

5 Months Ended

12 Months Ended

1 Months Ended

5 Months Ended

12 Months Ended

12 Months Ended

Nov. 15, 2013

Aug. 15, 2013

15-May-13

Feb. 15, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2011

Mar. 11, 2013

Oct. 17, 2012

Jun. 30, 2011

Nov. 30, 2010

Nov. 30, 2010

Nov. 30, 2008

Oct. 31, 2013

Nov. 30, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Nov. 30, 2008

Aug. 31, 2012

31-May-12

Apr. 30, 2012

Jan. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Aug. 31, 2012

31-May-12

Apr. 30, 2012

Jan. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Nov. 26, 2012

Aug. 02, 2012

Dec. 31, 2013

Mar. 11, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

GOGAS [Member]

Rupert Murdoch [Member]

Lord Jacob Rothschild [Member]

IEI [Member]

Afek Oil and Gas, Ltd. [Member]

Genie Mongolia [Member]

Preferred Stock [Member]

Preferred Stock [Member]

Preferred Stock [Member]

Preferred Stock [Member]

Common Class A [Member]

Common Class A [Member]

Common Class A [Member]

Common Class A [Member]

Common Class A [Member]

Common Class A [Member]

Common Class A [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Common Class B [Member]

Series 2012-A Preferred Stock [Member]

February 14 2014 [Member]

August 2, 2012 [Member]

November 26, 2012 [Member]

Michael Steinhardt [Member]

GOGAS [Member]

GOGAS [Member]

Harold Vinegar Chief Scientist [Member]

Harold Vinegar Chief Scientist [Member]

Harold Vinegar Chief Scientist [Member]

IEI [Member]

Stock Repurchase Program [Member]

Stock Repurchase Program [Member]

Harold Vinegar Chief Scientist [Member]

Equity (Textual)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock voting rights

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'Three votes per share.

'

'

'

'

'

'

'One-tenth of a vote per share.

'

'

'

'

'

'

'

'

'

Preferred stock, liquidation preference per share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$8.50

'

'

'

Common stock conversion basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'Each share of Class A common stock may be converted into one share of Class B common stock.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock dividend rate

$0.16

$0.16

$0.16

$0.13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.64

$0.16

'

'

Preferred stock, dividend payment rate, variable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Seven and one-half percent (7.5%) of the quotient obtained by dividing (A) the amount by which the EBITDA for a fiscal year of the Company's retail energy provider business exceeds $32 million by (B) 8,750,000 (the "Additional Dividend")

Excess amount of EBITDA

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$32,000,000

'

'

'

Additional dividend

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8,750,000

'

'

'

Cash dividend paid

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.05

$0.05

$0.03

$0.05

'

'

'

$0.05

$0.05

$0.03

$0.05

'

'

'

'

'

'

'

'

'

'

'

Preferred stock, redemption terms

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

The redemption price for the Preferred Stock is 101% of the Liquidation Preference plus all accrued and unpaid dividends between October 11, 2016 and October 11, 2017, and 100% of the Liquidation Preference plus all accrued and unpaid dividends thereafter.

Preferred stock dividend

'

'

'

'

'

'

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of stock authorized to be repurchased

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

'

'

Remaining number of shares available for repurchase

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

'

'

'

Terms of offer to exchange class B common stock shares for preferred stock shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The Company initiated an offer to exchange up to 8.75 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on October 10, 2012.

'The Company initiated an offer to exchange up to 7.15 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on March 5, 2013.

Common stock exchange into preferred stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,150,000

8,750,000

'

'

'

'

'

'

Issuance of Series A preferred stock in exchange for class B common stock

'

'

'

'

'

'

'

'

'

313,376

1,604,591

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum subsidiary capitalization for anti dilution protection

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000,000

'

'

'

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum subsidiary capitalization for anti dilution protection

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

'

'

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employment agreement description

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'In October of 2013, the Company completed the sale to the employee of 9.5% of the equity in Afek per the terms of his employment agreement.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

In November 2013, the Company completed the sale of 9.8% of the equity in Genie Mongolia to Vinegar as per the terms of his employment agreement.

Sale of stock consideration received on transaction paid through promissory note

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale of subsidiary stock percentage of ownership sold

'

'

'

'

'

'

10.00%

'

'

'

'

2.50%

0.50%

5.00%

10.00%

'

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Promissory note interest rate

'

'

'

'

'

'

'

'

'

'

'

'

1.58%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Promissory note maturity date

'

'

'

'

'

'

'

'

'

'

'

'

15-Nov-15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment warrant issued description

'

'

'

'

'

'

'

'

'

'

'

'

'

'warrants were issued to purchase up to an aggregate of 1% of the common stock outstanding of GOGAS at an exercise price of up to $2 million that expired on November 12, 2011

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment options and warrants aggregate exercise price

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment options, expiration date

'

'

'

'

'

'

'

'

'

'

'

9-Apr-15

'

12-Nov-17

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sales of stock of subsidiary

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount paid to Steinhardt stockholder entity

'

'

'

'

'

'

'

'

'

'

'

1,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends declared

'

'

'

'

1,148,000

'

'

3,057,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends paid

'

'

'

'

'

'

$1,131,000

$4,205,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013
Restricted Stock [Member]	'
Summary of the status of the Company's grants of restricted shares of Class B common stock	'
Beginning balance, Number of Non-vested Shares	1,898
Number of Non-vested Shares, Granted	75
Number of Non-vested Shares, Vested	-1,708
Number of Non-vested Shares, Forfeited	'
Ending balance, Number of Non-vested Shares	265
Beginning balance, Weighted-Average Grant-Date Fair Value	$2.70
Weighted-Average Grant-Date Fair Value, Granted	$9.81
Weighted-Average Grant-Date Fair Value, Vested	$1.92
Weighted-Average Grant-Date Fair Value, Forfeited	'
Ending balance, Weighted-Average Grant-Date Fair Value	$9.74

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 1)	5 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013
Equity compensation plans, Valuation Assumptions	'	'
Average risk-free interest rate	'	2.07%
Expected dividend yield	'	'
Expected volatility	67.70%	65.60%
Expected term	'	'6 years 6 months
Minimum [Member]	'	'
Equity compensation plans, Valuation Assumptions	'	'
Average risk-free interest rate	1.06%	'
Expected term	'6 years	'
Maximum [Member]	'	'
Equity compensation plans, Valuation Assumptions	'	'
Average risk-free interest rate	1.62%	'
Expected term	'7 years 3 months	'

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 2) (Stock Option [Member], USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Stock Option [Member]	'	'
Summary of stock option activity	'	'
Number of Options, Outstanding, Beginning Balance	457	'
Number of Options, Granted	3,000	'
Number of Options, Exercised	-13	'
Number of Options, Cancelled / Forfeited	-1	'
Number of Options, Outstanding, Ending Balance	3,443	457
Number of Options, Exercisable, Ending Balance	126	'
Weighted-Average Exercise Price Outstanding, Beginning Balance	$6.85	'
Weighted-Average Exercise Price, Granted	$10.30	'
Weighted-Average Exercise Price, Exercised	$6.85	'
Weighted-Average Exercise Price, Cancelled / Forfeited	$6.85	'
Weighted-Average Exercise Price Outstanding, Ending Balance	$9.86	$6.85
Weighted-Average Exercise Price, Exercisable	$6.85	'
Weighted-Average Remaining Contractual Term, Outstanding	'7 years 9 months 18 days	'8 years 2 months 12 days
Weighted-Average Remaining Contractual Term, Exercisable	'5 years 8 months 12 days	'
Aggregate Intrinsic Value, Outstanding Beginning Balance	$114	'
Aggregate Intrinsic Value, Outstanding Ending Balance	1,489	114
Aggregate Intrinsic Value, Exercisable	$424	'

StockBased_Compensation_Detail3

Stock-Based Compensation (Details Textual) (USD $)

5 Months Ended

12 Months Ended

1 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2011

Jul. 31, 2011

Jul. 31, 2010

Mar. 28, 2012

Oct. 31, 2009

Mar. 28, 2012

31-May-13

Mar. 28, 2012

Mar. 28, 2012

Mar. 28, 2012

Mar. 28, 2012

Nov. 04, 2013

Mar. 28, 2012

Mar. 28, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 12, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 12, 2013

Jan. 06, 2014

Dec. 12, 2013

Aug. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Aug. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

GEIC [Member]

GEIC [Member]

IDT Energy [Member]

IDT Energy [Member]

IDT Energy [Member]

Israel Energy Initiatives Ltd [Member]

Israel Energy Initiatives Ltd [Member]

Israel Energy Initiatives Ltd [Member]

Afek Oil and Gas, Ltd [Member]

Afek Oil and Gas, Ltd [Member]

Genie Mongolia [Member]

Genie Mongolia [Member]

Genie Mongolia [Member]

Stock Option [Member]

Stock Option [Member]

Stock Option [Member]

Restricted Stock Granted by IDT Corporation [Member]

Restricted Stock Granted by IDT Corporation [Member]

Restricted Stock Granted by IDT Corporation [Member]

Restricted Stock Granted by IDT Corporation [Member]

Subsidiary Equity [Member]

Subsidiary Equity [Member]

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Common Stock Class B

Deferred Stock [Member]

2011 Stock Option and Incentive Plan [Member]

2011 Stock Option and Incentive Plan [Member]

Former Chief Executive Officer [Member]

Board of Directors Chairman [Member]

Board of Directors Chairman [Member]

Board of Directors Chairman [Member]

Board of Directors Chairman [Member]

Howard Jonas [Member]

Michael Stein [Member]

President [Member]

IDT Energy [Member]

Restricted Stock [Member]

Stock Option [Member]

IDT Energy [Member]

Common Stock Class B

Stock-Based Compensation (Textual)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock reserved for future issuance

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,140,000

Shares available for future grants, (Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000

'

Reserved common shares for grants as resulted of spin off, (Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,500,000

Weighted-average grant date fair value of options granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$4.35

$6.42

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of options exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$29,000

$2,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total unrecognized compensation cost related to non-vested stock-based compensation arrangements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,200,000

'

'

'

'

'

2,700,000

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

Period of unrecognized compensation cost expected to be recognized

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years 6 months

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'1 year 2 months 12 days

'

'

'

'

Options issued to purchase company's common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000

'

'

'

'

'

'

'

'

'

'

3,000,000

'

'

'

'

50,000

'

'

'

Stock options, exercise price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$10.30

'

'

'

'

'

'

'

$6.85

'

'

'

Stock-based compensation costs

630,000

800,000

4,180,000

3,429,000

751,000

300,000

'

'

'

'

'

'

'

'

'

'

'

'

100,000

400,000

400,000

600,000

2,000,000

2,100,000

800,000

1,800,000

900,000

'

'

'

'

'

'

'

'

'

'

'

'

Shares granted to consultant, percentage of outstanding shares

'

'

'

'

'

'

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares issued restricted stock award (Shares)

'

'

'

'

'

'

'

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

227

49

'

29,126

63,917

'

'

'

'

'

'

Exchange shares of IDT's Class B common stock for GEIC common stock, maximum

'

'

'

'

'

'

'

'

1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Description of warrant share exchange ratio

'

'

'

'

'

'

'

'

'225.13 shares of IDT's Class B common stock for one share of GEIC common stock.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Warrant expiration date

'

'

'

'

'

'

'

'

21-Oct-14

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of equity in subsidiary, fully diluted, granted to officer

'

'

'

'

'

'

'

'

'

2.50%

'

'

0.25%

'

0.30%

'

'

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of equity in subsidiary, fully diluted, granted to other officers and employees

'

'

'

'

'

'

'

1.13%

'

'

1.00%

1.40%

'

1.40%

'

1.00%

2.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total grant date fair value of shares vested

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15,000

3,300,000

3,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of the grants of equity interests

'

'

5,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

19,300,000

'

'

'

'

'

'

'

'

'

'

'

End of vesting period of equity interests

'

'

'Vesting periods that ends at various dates through July 2017.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued in exchange in exchange for vested deferred stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

133,758

'

'

'

'

'

Vested deferred stock units of IDT Energy

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

23.6

'

'

Term description for new officer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The Company's Chief Executive Officer for a five-year term that commenced on January 1, 2014.

'

'

'

'

'

'

'

'

'

'

'

Option term description

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The options vest in five equal annual installments commencing on December 15, 2014 and expire ten years from the grant date

'

'

'

'

'

'

'

'

'

'

'

Term of restricted shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The restricted shares vest in three equal annual installments commencing on January 5, 2015.

'The restricted shares vest in commencing in January 2014 through January 2017.

'

'

'

'

'

'

Fair value of the restricted shares on the date of grant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$300,000

$700,000

'

'

'

'

'

'

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Schedule Of Net Income Loss And Aggregate Net Funding Repaid Or Provided By Company To Variable Interest Entity [Abstract]	'	'	'	'	'
Aggregate funding repaid to (provided by) the Company, net	($2,529)	'	$4,118	$738	($3,291)
CCE [Member]	'	'	'	'	'
Schedule Of Net Income Loss And Aggregate Net Funding Repaid Or Provided By Company To Variable Interest Entity [Abstract]	'	'	'	'	'
Net income (loss)	-235	'	2,080	1,857	-2,041
DAD [Member]	'	'	'	'	'
Schedule Of Net Income Loss And Aggregate Net Funding Repaid Or Provided By Company To Variable Interest Entity [Abstract]	'	'	'	'	'
Net income (loss)	-477	'	-67	-327	-263
Tari [Member]	'	'	'	'	'
Schedule Of Net Income Loss And Aggregate Net Funding Repaid Or Provided By Company To Variable Interest Entity [Abstract]	'	'	'	'	'
Net income (loss)	'	'	$52	$161	($3)

Variable_Interest_Entities_Det1

Variable Interest Entities (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	$4,596	$6,789
Total liabilities and noncontrolling interests	4,596	6,789
Cash and cash equivalents [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	434	1,047
Restricted cash [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	537	39
Trade accounts receivable [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	2,459	4,168
Prepaid expenses [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	364	485
Other current assets [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	353	519
Fixed assets, net [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	'	38
Other assets [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total assets	449	493
Current liabilities [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total liabilities and noncontrolling interests	2,937	3,035
Due to IDT Energy [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total liabilities and noncontrolling interests	964	5,082
Noncontrolling Interests [Member]	'	'
Variable Interest Entity, Classification of Carrying Amount, Assets and Liabilities, Net [Abstract]	'	'
Total liabilities and noncontrolling interests	$695	($1,328)

Variable_Interest_Entities_Det2

Variable Interest Entities (Details Textual) (DAD [Member])	12 Months Ended
	Dec. 31, 2012
DAD [Member]	'
Variable Interest Entity Textual [Abstract]	'
Ownership interest hold by Tari in DAD sales	100.00%

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Summary of changes in accumulated other comprehensive income by component, including reclassifications	'	'	'	'	'
Accumulated other comprehensive income (loss), Unrealized loss on available-for-sale securities, Beginning balance	'	'	($15)	'	'
Accumulated other comprehensive income (loss), Foreign currency translation, Beginning balance	357	-24	285	-137	-24
Accumulated other comprehensive income (loss), Net, Beginning balance	357	-24	270	-137	-24
Other comprehensive (loss) income before reclassifications, Unrealized loss on available-for-sale securities	'	'	-55	'	'
Other comprehensive (loss) income before reclassifications, Foreign currency translation	'	'	460	'	'
Other comprehensive (loss) income before reclassifications, Accumulated other comprehensive income	'	'	405	'	'
Amounts reclassified from accumulated other comprehensive income, Unrealized loss on available-for-sale securities	'	'	70	'	'
Amounts reclassified from accumulated other comprehensive income, Foreign currency translation	'	'	'	'	'
Amounts reclassified from accumulated other comprehensive income, Accumulated other comprehensive income	'	'	70	'	'
Amounts reclassified from accumulated other comprehensive income, Location of (Gain) loss recognized	'	'	'Interest income	'	'
Other comprehensive income (loss) attributable to Genie, unrealized loss on available-for-sale securities	'	'	15	-15	'
Other comprehensive income (loss) attributable to Genie, Foreign currency translation	-494	'	460	422	381
Other comprehensive income (loss) attributable to Genie, Accumulated other comprehensive income (loss)	-494	'	475	407	381
Accumulated other comprehensive income (loss), Unrealized loss on available-for-sale securities, Ending balance	'	'	'	-15	'
Accumulated other comprehensive income (loss), Foreign currency translation, Ending balance	-137	'	745	285	357
Accumulated other comprehensive income (loss), Net, Ending balance	($137)	'	$745	$270	$357

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Future minimum payments for operating leases	'
2014	$302
2015	236
2016	13
2017	'
2018	'
Thereafter	'
Total payments	$551

Commitments_and_Contingencies_2

Commitments and Contingencies (Details Textual) (USD $)	5 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011	Jul. 31, 2013
Commitments And Contingencies (Textual)	'	'	'	'	'	'
Purchase and other commitments	'	'	$2,200,000	'	'	'
Amount accrued and paid for income tax audit	'	'	'	'	'	900,000
Amount accrued for income tax audit	'	'	300,000	'	'	'
Line of credit facility, amount outstanding	'	'	5,700,000	'	'	'
Line of credit facility expiration, Description	'	'	'The letters of credit outstanding as of December 31, 2013 expire in the year ending December 31, 2014.	'	'	'
Rental expense under operating leases	300,000	42,000	600,000	800,000	200,000	'
Trade accounts payable	'	'	25,302,000	20,641,000	'	'
Description of termination date of agreement between BP Energy and IDT Energy	'	'	'	'	'	'
			The agreement’s termination date is June 30, 2015.
BP [Member]	'	'	'	'	'	'
Commitments And Contingencies (Textual)	'	'	'	'	'	'
Restricted cash pledged as collateral	'	'	4,400,000	'	'	'
Trade accounts receivable pledged as collateral	'	'	42,300,000	'	'	'
Trade accounts payable	'	'	18,700,000	'	'	'
Afek Oil and Gas, Ltd. [Member]	'	'	'	'	'	'
Commitments And Contingencies (Textual)	'	'	'	'	'	'
Purchase and other commitments	'	'	500,000	'	'	'
IDT Energy [Member]	'	'	'	'	'	'
Commitments And Contingencies (Textual)	'	'	'	'	'	'
Aggregate performance bond outstanding	'	'	3,200,000	'	'	'
JPMorgan [Member]	'	'	'	'	'	'
Commitments And Contingencies (Textual)	'	'	'	'	'	'
Line of credit facility, amount outstanding	'	'	$5,700,000	'	'	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	5 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Summary of related party transactions	'	'	'	'	'
Included in "Selling, general and administrative expense"	$2,578	$1,837	$3,348	$3,775	$4,694
Included in "Provision for income taxes"	1,945	3,220	'	'	5,736
Amount the Company charged IDT	'	'	$285	$129	'

Related_Party_Transactions_Det1

Related Party Transactions (Details Textual) (USD $)	5 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction (Textual)	'	'	'
Notes receivable outstanding from employees	'	$900,000	$700,000
Commissions and fees payments to related party	9,082	11,074	9,527
Total payments for various insurance policies	$101,818	$124,149	$106,812

Business_Segment_Information_D

Business Segment Information (Details) (USD $)

3 Months Ended

5 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2011

Operating results for the business segments

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

$67,071

$71,638

$55,134

$85,331

[1]

$65,403

[1]

$63,725

$42,826

$57,505

$76,783

$74,877

$279,174

$229,459

$196,018

Income (loss) from operations

-386

3,948

-5,569

2,633

[1]

1,891

[1]

3,469

-5,006

2,693

1,728

5,556

626

3,047

6,974

Depreciation

'

'

'

'

'

'

'

'

15

11

110

124

24

Research and development

'

'

'

'

'

'

'

'

2,648

3,045

11,389

9,365

7,843

Equity in the net loss of AMSO, LLC

'

'

'

'

'

'

'

'

2,095

1,658

3,194

3,175

5,238

IDT Energy [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating results for the business segments

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

76,783

74,877

279,174

229,459

196,018

Income (loss) from operations

'

'

'

'

'

'

'

'

8,907

11,739

25,696

24,972

22,458

Depreciation

'

'

'

'

'

'

'

'

15

11

15

40

24

Research and development

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity in the net loss of AMSO, LLC

'

'

'

'

'

'

'

'

'

'

'

'

'

Genie Oil and Gas [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating results for the business segments

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from operations

'

'

'

'

'

'

'

'

-5,476

-5,570

-15,955

-14,038

-13,641

Depreciation

'

'

'

'

'

'

'

'

'

'

94

83

'

Research and development

'

'

'

'

'

'

'

'

2,648

3,045

11,389

9,365

7,843

Equity in the net loss of AMSO, LLC

'

'

'

'

'

'

'

'

2,095

1,658

3,194

3,175

5,238

Corporate [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating results for the business segments

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from operations

'

'

'

'

'

'

'

'

-1,703

-613

-9,115

-7,887

-1,843

Depreciation

'

'

'

'

'

'

'

'

'

'

1

1

'

Research and development

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity in the net loss of AMSO, LLC

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

In the fourth quarter of 2012, there were errors impacting revenue recognized and the related receivable balances at IDT Energy, and related to a sales tax refund and a gross receipt tax accrual. The Company corrected these in the first quarter of 2013, although the corrections should have been recorded in the fourth quarter of 2012. The impact of these items would have decreased the net income in 2012 and increased the net income in 2013 by $1.7 million. The Company's management determined that the errors in 2012 and the related corrections in 2013 did not have a material impact on the Company's financial statements for 2012 and 2013 and for each of the quarters within those years, and accordingly determined that no restatement of prior filings is necessary.

Business_Segment_Information_D1

Business Segment Information (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Summary total assets for the business segments	'	'	'
Total assets	$158,843	$150,306	$150,194
IDT Energy [Member]	'	'	'
Summary total assets for the business segments	'	'	'
Total assets	76,691	65,377	60,483
Genie Oil and Gas [Member]	'	'	'
Summary total assets for the business segments	'	'	'
Total assets	42,193	36,561	2,498
Corporate [Member]	'	'	'
Summary total assets for the business segments	'	'	'
Total assets	$39,959	$48,368	$87,213

Business_Segment_Information_D2

Business Segment Information (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Net long-lived assets and total assets held outside of the United States	'	'	'
Long-lived assets, net	$729	$417	$452
Total assets	158,843	150,306	150,194
United States [Member]	'	'	'
Net long-lived assets and total assets held outside of the United States	'	'	'
Long-lived assets, net	352	71	101
Total assets	150,315	142,694	148,180
Foreign Countries [Member]	'	'	'
Net long-lived assets and total assets held outside of the United States	'	'	'
Long-lived assets, net	377	346	351
Total assets	$8,528	$7,612	$2,014

Business_Segment_Information_D3

Business Segment Information (Details Textual)	12 Months Ended
	Dec. 31, 2013
	Segment
Business Segment Information (Textual)	'
Number of reportable segments	2
GEIC [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	99.30%
IDT Energy [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	100.00%
Ownership interest of company	2.30%
GOGAS [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	92.00%
AMSO, LLC [Member]	'
Business Segment Information (Textual)	'
Ownership interest of company	48.16%
Israel Energy Initiatives Ltd [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	88.60%
Afek Oil and Gas Ltd [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	89.00%
Genie Mongolia [Member]	'
Business Segment Information (Textual)	'
Company's investment, ownership percentage in subsidiary	90.00%

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended										5 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2011
Selected quarterly financial data of company	'	'	'	'		'		'	'	'	'	'	'	'	'
Revenues	$67,071	$71,638	$55,134	$85,331	[1]	$65,403	[1]	$63,725	$42,826	$57,505	$76,783	$74,877	$279,174	$229,459	$196,018
Direct cost of revenues	50,237	51,699	45,168	66,312	[1]	46,936	[1]	42,285	31,178	39,473	52,476	53,422	213,416	159,872	142,171
Income (loss) from operations	-386	3,948	-5,569	2,633	[1]	1,891	[1]	3,469	-5,006	2,693	1,728	5,556	626	3,047	6,974
Net (loss) income	-1,118	2,042	-6,168	-97	[1]	1,060	[1]	-1,084	-3,714	1,203	-268	916	-5,341	-2,535	-2,555
Net (loss) income attributable to Genie Energy Ltd.	($483)	$1,991	($5,901)	($1,510)	[1]	$2,008	[1]	($2,641)	($3,252)	$604	$847	$1,731	($5,903)	($3,281)	$1,630
(Loss) earnings per common share, Basic	($0.04)	$0.09	($0.32)	($0.09)	[1]	$0.09	[1]	($0.13)	($0.15)	$0.03	$0.04	$0.09	($0.36)	($0.17)	$0.08
(Loss) earnings per common share, Diluted	($0.04)	$0.08	($0.32)	($0.09)	[1]	$0.08	[1]	($0.13)	($0.15)	$0.03	$0.04	$0.08	($0.36)	($0.17)	$0.07
[1]	In the fourth quarter of 2012, there were errors impacting revenue recognized and the related receivable balances at IDT Energy, and related to a sales tax refund and a gross receipt tax accrual. The Company corrected these in the first quarter of 2013, although the corrections should have been recorded in the fourth quarter of 2012. The impact of these items would have decreased the net income in 2012 and increased the net income in 2013 by $1.7 million. The Company's management determined that the errors in 2012 and the related corrections in 2013 did not have a material impact on the Company's financial statements for 2012 and 2013 and for each of the quarters within those years, and accordingly determined that no restatement of prior filings is necessary.

Selected_Quarterly_Financial_D3

Selected Quarterly Financial Data (Unaudited) (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Selected Quarterly Financial Data (Unaudited) [Abstract]	'	'
Change in net income	$1.70	($1.70)