Genie Energy (GNE) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	5-May-15
Entity Registrant Name	Genie Energy Ltd.
Entity Central Index Key	1528356
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Filer Category	Accelerated Filer
Class A common stock
Entity Common Stock, Shares Outstanding		1,574,326
Class B common stock
Entity Common Stock, Shares Outstanding		22,995,735

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$56,023	$71,895
Restricted cash - short-term	11,620	10,609
Certificates of deposit	4,677	4,669
Trade accounts receivable, net of allowance for doubtful accounts of $233 and $227 at March 31, 2015 and December 31, 2014, respectively	39,536	31,427
Inventory	8,521	11,166
Prepaid expenses	8,361	5,713
Deferred income tax assets, net	1,463	1,463
Other current assets	7,711	5,430
Total current assets	137,912	142,372
Property and equipment, net	1,778	1,902
Capitalized exploration costs - unproved oil and gas property	4,308
Goodwill	3,663	3,663
Restricted cash - long-term	1,385	1,023
Other assets	4,562	3,968
Total assets	153,608	152,928
Current liabilities:
Trade accounts payable	15,026	14,881
Accrued expenses	14,259	10,913
Advances from customers	135	403
Income taxes payable	602	543
Due to IDT Corporation	136	542
Energy hedging contracts	4,977	4,003
Other current liabilities	816	797
Total current liabilities	35,951	32,082
Other liabilities	1,528	1,503
Total liabilities	37,479	33,585
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 2,322 shares issued and outstanding at March 31, 2015 and December 31, 2014	19,743	19,743
Additional paid-in capital	115,460	114,322
Treasury stock, at cost, consisting of 197 shares and 194 shares of Class B common stock at March 31, 2015 and December 31, 2014, respectively	-1,565	-1,543
Accumulated other comprehensive (loss) income	-52	10
Accumulated deficit	-11,613	-7,759
Total Genie Energy Ltd. stockholders' equity	122,221	125,021
Noncontrolling interests:
Noncontrolling interests	-5,092	-4,678
Receivable for issuance of equity	-1,000	-1,000
Total noncontrolling interests	-6,092	-5,678
Total equity	116,129	119,343
Total liabilities and equity	153,608	152,928
Class A common stock
Genie Energy Ltd. stockholders' equity:
Common stock, value	16	16
Class B common stock
Genie Energy Ltd. stockholders' equity:
Common stock, value	$232	$232

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Per Share data, unless otherwise specified
Allowance for doubtful accounts, trade accounts receivable (in dollars)	$233	$227
Preferred stock, par value (In dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	10,000	10,000
Series 2012-A Preferred Stock
Designated shares	8,750	8,750
Preferred stock, shares issued	2,322	2,322
Preferred stock, shares outstanding	2,322	2,322
Class A common stock
Common stock, par value (In dollars per share)	$0.01	$0.01
Common stock, shares authorized	35,000	35,000
Common stock, shares issued	1,574	1,574
Common stock, shares outstanding	1,574	1,574
Class B common stock
Common stock, par value (In dollars per share)	$0.01	$0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	23,186	23,178
Common stock, shares outstanding	22,989	22,984
Treasury stock, shares	197	194

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Revenues:
Electricity	$47,336		$95,782
Natural gas	26,164		34,213
Other	929		353
Total revenues	74,429		130,348
Direct cost of revenues	57,229		120,452
Gross profit	17,200		9,896
Operating expenses:
Selling, general and administrative (i)	16,639	[1]	14,289	[1]
Research and development	703		1,187
Exploration	1,573		913
Loss from operations	-1,715		-6,493
Interest income	99		93
Financing fees	-734		-945
Other income, net	11		17
Loss before income taxes	-2,339		-7,328
(Provision for) benefit from income taxes	-91		181
Net loss	-2,430		-7,147
Net loss attributable to noncontrolling interests	420		363
Net loss attributable to Genie Energy Ltd.	-2,010		-6,784
Dividends on preferred stock	-370		-306
Net loss attributable to Genie Energy Ltd. common stockholders.	($2,380)		($7,090)
Basic and diluted loss per share attributable to Genie Energy Ltd. common stockholders	($0.11)		($0.33)
Weighted-average number of shares used in calculation of basic and diluted loss per share	22,107		21,170
Dividends declared per common share	$0.06
[1]	(i) Stock-based compensation included in selling, general and administrative expense $ 1,237 $ 1,839

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statements of Operations [Abstract]
Stock-based compensation included in selling, general and administrative expense	$1,237	$1,839

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statements Of Comprehensive (Loss) Income [Abstract]
Net loss	($2,430)	($7,147)
Other comprehensive loss:
Foreign currency translation adjustments	-56	-30
Comprehensive loss	-2,486	-7,177
Comprehensive loss attributable to noncontrolling interests	414	361
Comprehensive loss attributable to Genie Energy Ltd.	($2,072)	($6,816)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net loss	($2,430)	($7,147)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	104	29
Provision for doubtful accounts receivable	8
Stock-based compensation	1,237	1,839
Change in assets and liabilities:
Restricted cash	-1,373	3,450
Trade accounts receivable	-8,117	-33,446
Inventory	2,646	2,693
Prepaid expenses	-2,648	-1,028
Other current assets and other assets	-2,603	-471
Trade accounts payable, accrued expenses and other current liabilities	4,507	7,620
Advances from customers	-268	-859
Due to IDT Corporation	-407	-309
Income taxes payable	58	-2,089
Net cash used in operating activities	-9,286	-29,718
Investing activities
Capital expenditures	-289	-114
Investments in capitalized exploration costs - unproved oil and gas property	-4,308
Payment for acquisitions	-63
Proceeds from maturities of certificates of deposit		2,600
Net cash (used in) provided by investing activities	-4,660	2,486
Financing activities
Dividends paid	-1,840	-306
Proceeds from exercise of stock options		23
Repurchases of Class B common stock from employees	-22
Net cash used in financing activities	-1,862	-283
Effect of exchange rate changes on cash and cash equivalents	-64	-19
Net decrease in cash and cash equivalents	-15,872	-27,534
Cash and cash equivalents at beginning of period	71,895	73,885
Cash and cash equivalents at end of period	$56,023	$46,351

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Basis of Presentation [Abstract]
Basis of Presentation	Note 1—Basis of Presentation
	The accompanying unaudited consolidated financial statements of Genie Energy Ltd. and its subsidiaries (the “Company” or “Genie”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The balance sheet at December 31, 2014 has been derived from the Company’s audited financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. For further information, please refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, as filed with the U.S. Securities and Exchange Commission (the “SEC”).
	The Company owns 99.3% of its subsidiary, Genie Energy International Corporation (“GEIC”), which owns 100% of Genie Retail Energy (“GRE”) and 92% of Genie Oil and Gas, Inc. (“GOGAS”). Genie’s principal businesses consist of the following:
		●	Genie Retail Energy operates retail energy providers (“REPs”), including IDT Energy, Inc. (“IDT Energy”) and Residents Energy, Inc. (“Residents Energy”), and energy brokerage and marketing services. Its REP businesses resell electricity and natural gas to residential and small business customers primarily in the Eastern United States; and
		●	Genie Oil and Gas is an oil and gas exploration company that consists of:
		●	an 88.1% interest in Afek Oil and Gas, Ltd. (“Afek”), which operates an exploration project in the southern portion of the Golan Heights in Northern Israel, and
		●	early stage projects including (1) an 89.8% interest in Genie Mongolia, Inc. (“Genie Mongolia”), an oil shale exploration project in Central Mongolia, (2) American Shale Oil Corporation (“AMSO”), which holds and manages a 42.8% interest in American Shale Oil, L.L.C. (“AMSO, LLC”), an oil shale development project in Colorado, and (3) an 87.4% interest in Israel Energy Initiatives, Ltd. (“IEI”), an oil shale development project in Israel.
	On May 5, 2015, the Compensation Committee of the Company’s Board of Directors approved the grant of deferred stock units in GRE to certain of the Company’s officers and employees. Howard S. Jonas, the Company’s Chairman and Chief Executive Officer, was granted deferred stock units representing 2.8% of the outstanding equity in GRE, Avi Goldin, the Company’s Chief Financial Officer and Executive Vice President - Finance was granted deferred stock units representing 0.2% of the outstanding equity in GRE, Michael Stein, the Company’s Executive Vice President and the Chief Executive Officer and a Director of GRE was granted deferred stock units representing 0.3% of the outstanding equity in GRE, and the other employees were granted deferred stock units representing 0.6% of the outstanding equity in GRE. The deferred stock units will be granted on or about July 23, 2015, and shall vest in equal amounts on the first, second and third anniversaries of the date of grant.
	IDT Energy has outstanding deferred stock units granted to directors and employees that represent an interest of 1.2% of the equity of IDT Energy.
	In the consolidated statement of operations, $0.9 million of expense relating to Afek’s oil and gas activities previously included in “Research and development expense” in the three months ended March 31, 2014 were reclassified to “Exploration expense” to conform to the current year’s presentation.
	Seasonality and Weather
	The weather and the seasons, among other things, affect GRE’s revenues. Weather conditions have a significant impact on the demand for natural gas used for heating and electricity used for heating and cooling. Typically, colder winters increase demand for natural gas and electricity, and hotter summers increase demand for electricity. Milder winters and/or summers have the opposite effects. Natural gas revenues typically increase in the first quarter due to increased heating demands and electricity revenues typically increase in the third quarter due to increased air conditioning use. Approximately 59% and 49% of GRE’s natural gas revenues for the relevant years were generated in the first quarter of 2014 and 2013, respectively, when demand for heating was highest. Although the demand for electricity is not as seasonal as natural gas, approximately 20% and 31% of GRE’s electricity revenues for the relevant years were generated in the third quarter of 2014 and 2013, respectively. Because of dramatic increases in wholesale electricity prices in January and February 2014, the retail electricity prices that GRE and many other variable rate electricity suppliers charged to their customers also increased sharply. As a result, approximately 45% of GRE’s electricity revenues in 2014 were generated in the first quarter of 2014. The Company’s revenues and operating income are subject to material seasonal variations, and the interim financial results are not necessarily indicative of the estimated financial results for the full year.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Measurements [Abstract]
Fair Value Measurements
	Note 2—Fair Value Measurements
	The following table presents the balance of assets and liabilities measured at fair value on a recurring basis:
		Level 1 (1)			Level 2 (2)		Level 3 (3)		Total
		(in thousands)
	31-Mar-15
	Assets:
	Derivative contracts	$	1,017		$	3,603	$	—	$	4,620
	Liabilities:
	Derivative contracts	$	297		$	4,680	$	—	$	4,977
	31-Dec-14
	Assets:
	Derivative contracts	$	1,001		$	1,376	$	—	$	2,377
	Liabilities:
	Derivative contracts	$	440		$	3,563	$	—	$	4,003
	(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 put and call options and swaps. The underlying asset in the Company’s put and call options is a forward contract. The Company’s swaps are agreements whereby a floating (or market or spot) price is exchanged for a fixed price over a specified period. The Company’s derivatives were classified as Level 1, Level 2 or Level 3. The Level 1 derivatives were valued using quoted prices in active markets for identical contracts. The Level 2 derivatives were 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 in June 2011 at an exercise price of $5.0 million. The expiration date was April 9, 2015. The expiration date was extended for one month, and on May 8, 2015, the option was exercised. At March 31, 2015 and December 31, 2014, the fair value of the GOGAS stock option was nil.
	The following table summarizes the change in the balance of the Company’s assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2014. There were no liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2014. There were no assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2015.
	(in thousands)
	Balance, December 31, 2013	$	62
	Total losses (realized or unrealized) included in earnings in “Direct cost of revenues”		(62	)
	Balance, March 31, 2014	$	—
	The amount of total gains or 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	$	—
	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.
	Restricted cash—short-term, certificates of deposit, prepaid expenses, other current assets, advances from customers, due to IDT Corporation and other current liabilities. At March 31, 2015 and December 31, 2014, the carrying amounts of these assets and liabilities approximated fair value because of the short period to maturity. The fair value estimate for restricted cash—short-term was classified as Level 1 andcertificates of deposit, prepaid expenses, other current assets, advances from customers,due to IDT Corporation and other current liabilities were classified as Level 2 of the fair value hierarchy.
	Restricted cash—long-term. At March 31, 2015 and December 31, 2014, 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 March 31, 2015 and December 31, 2014, other assets included an aggregate of $1.5 million in notes receivable. The carrying amounts of the notes receivable and other liabilities approximated fair value. The fair value 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	3 Months Ended
	Mar. 31, 2015
Derivative Instruments [Abstract]
Derivative Instruments	Note 3—Derivative Instruments
	The primary risk managed by the Company using derivative instruments is commodity price risk, which is accounted for in accordance with Accounting Standards Codification 815—Derivatives and Hedging. Natural gas and electricity put and call options and swaps 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 options or swaps, 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. At March 31, 2015 and December 31, 2014, GRE’s swaps and options were traded on the New York Mercantile Exchange.
	The summarized volume of GRE’s outstanding contracts and options as of March 31, 2015 was as follows (MWh – Megawatt hour and Dth – Decatherm):
	Commodity	Settlement Dates	Volume
	Electricity	May-15	16,000 MWh
	Electricity	Jun-15	38,720 MWh
	Electricity	Jul-15	340,400 MWh
	Electricity	Aug-15	310,800 MWh
	Electricity	Oct-15	52,800 MWh
	Electricity	Nov-15	48,000 MWh
	Electricity	Dec-15	132,000 MWh
	Electricity	Jan-16	176,000 MWh
	Electricity	Feb-16	184,800 MWh
	Natural gas	May-15	1,000,000 Dth
	Natural gas	Jul-15	3,645,000 Dth
	Natural gas	Aug-15	530,000 Dth
	Natural gas	Sep-15	225,000 Dth
	Natural gas	Oct-15	155,000 Dth
	Natural gas	Jan-16	2,342,500 Dth
	Natural gas	Jul-16	1,110,000 Dth
	Natural gas	Aug-16	800,000 Dth
	The fair value of outstanding derivative instruments recorded as assets in the accompanying consolidated balance sheets were as follows:
	Asset Derivatives	Balance Sheet Location	31-Mar-15			December 31, 2014
			(in thousands)
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current assets	$	4,620		$	2,377
	The fair value of outstanding derivative instruments recorded as liabilities in the accompanying consolidated balance sheets were as follows:
	Liability Derivatives	Balance Sheet Location	31-Mar-15			December 31,
						2014
			(in thousands)
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Energy hedging contracts	$	4,977		$	4,003
	The effects of derivative instruments on the consolidated statements of operations were as follows:
			Amount of Gain (Loss) Recognized on Derivatives
			Three Months Ended March 31,
	Derivatives not designated or not qualifying	Location of Gain (Loss)	2015			2014
	as hedging instruments	Recognized on Derivatives
			(in thousands)
	Energy contracts and options	Direct cost of revenues	$	(957	)	$	(35	)

Afek_Oil_and_Gas_Exploration_A

Afek Oil and Gas Exploration Activities	3 Months Ended
	Mar. 31, 2015
Afek Oil and Gas Exploration Activities [Abstract]
Afek Oil and Gas Exploration Activities
	Note 4—Afek Oil and Gas Exploration Activities
	In April 2013, the Government of Israel finalized the award to Afek of an exclusive three year petroleum exploration license covering 396.5 square kilometers in the southern portion of the Golan Heights. In 2013, Afek completed preliminary geophysical work including electromagnetic and gravimetric surveys and reprocessing of the 2D seismic data to characterize the subsurface prior to drilling exploration wells. Afek subsequently began the analysis of the acquired data internally and with outside oil exploration experts.
	In early 2014, Afek submitted a permit application to the Planning and Construction Committee, North District, to conduct a ten-well exploration drilling program to further characterize the resource in its license area. In July 2014, the Israeli Planning and Construction Committee, North District voted to approve the ten-well exploratory drilling program, and subsequently issued the requisite permits. In October 2014, the High Court of Justice in Israel issued an interim order to halt Afek’s drilling program until it could rule on a petition filed by the Israel Union for Environmental Defense and some local residents challenging the issuance of the drilling permit. In December 2014, the Court ruled against the petitioners, and lifted its interim order.
	In February 2015, Afek began drilling its first exploratory well in Northern Israel’s Golan Heights. The results to date correlate with pre-drilling models, and, while non-conclusive, indicate the presence of hydrocarbons. A definitive determination as to the nature of the resource, its volume, and commercial potential will require further analysis, additional core sampling and the drilling of additional wells. In April 2015, Afek started preparations for a second exploratory well.
	The Company accounts for Afek’s oil and gas activities under the successful efforts method of accounting. Under this method, the costs of drilling exploratory wells and exploratory-type stratigraphic test wells are capitalized, pending determination of whether the well has found proved reserves. Other exploration costs are charged to expense as incurred. Unproved properties are assessed for impairment, and if considered impaired, are charged to expense when such impairment is deemed to have occurred.
	At March 31, 2015, capitalized exploratory well costs of unproved properties were $4.3 million. In the three months ended March 31, 2015 and 2014, the Company recognized exploration expense of $1.6 million and $0.9 million, respectively.

Investment_in_American_Shale_O

Investment in American Shale Oil, LLC	3 Months Ended
	Mar. 31, 2015
Investment In American Shale Oil, Llc [Abstract]
Investment in American Shale Oil, LLC	Note 5—Investment in American Shale Oil, LLC
	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.
	Except as set forth below, AMSO was responsible for funding 20% of the initial $50 million of AMSO, LLC’s expenditures, and is responsible for funding 35% of the approved expenditures between $50 million and $100 million, and 40% of the costs of the one-time payment for conversion of AMSO, LLC’s research, development and demonstration lease to a commercial lease, in the event AMSO, LLC’s application for conversion is approved, with the remaining amounts of such expenditures to be funded by Total S.A. (“Total”). All other expenditures are to be borne in proportion to equity ownership. The percentages for expenditures are subject to proportional adjustment in connection with certain changes in the equity ownership of AMSO LLC. As of March 31, 2015, the cumulative contributions of AMSO and Total to AMSO, LLC were $80.0 million. AMSO’s allocated share of the net loss of AMSO, LLC was nil in the three months ended March 31, 2015 and 2014.
	AMSO has the right to decide at each capital call whether or not to fund AMSO, LLC, and will make a determination at each such time. AMSO has not funded the capital calls for any quarter since the fourth quarter of 2013. In the period from January 2014 through March 2015, Total funded an aggregate of $3.8 million for AMSO’s share of the capital calls that AMSO did not fund. Because of AMSO’s decisions not to fund its share of AMSO, LLC’s expenditures, AMSO’s ownership interest in AMSO, LLC was reduced to 42.8% and Total’s ownership interest increased to 57.2%. In addition, AMSO’s share of future funding of AMSO, LLC up to a cumulative $100 million was reduced to 30.0% and Total’s share increased to 70.0%. AMSO is evaluating its options with respect to funding AMSO, LLC during the remainder of 2015, 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 following table summarizes the change in the balance of the Company’s investment in AMSO, LLC:
		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Balance, beginning of period	$	(252	)	$	(252	)
	Capital contributions		—			—
	Equity in the net loss of AMSO, LLC		—			—
	Balance, end of period	$	(252	)	$	(252	)
	At March 31, 2015 and at December 31, 2014, the liability for equity loss in AMSO, LLC was included in “Accrued expenses” in the consolidated balance sheet.
	In part because of AMSO’s decisions not to fund its share of AMSO, LLC’s expenditures, AMSO, LLC allocates its net loss beginning January 2014 as follows: the first $11.6 million of losses are allocated to Total, then it allocates 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 March 31, 2015, the Company’s maximum exposure to additional loss because of its required investment in AMSO, LLC was $0.5 million, based on AMSO, LLC’s proposed budget for the remainder of 2015. The Company’s maximum exposure to additional loss could increase based on the situations described above. The maximum exposure at March 31, 2015 was determined as follows:
		(in thousands)
	AMSO’s committed investment in AMSO, LLC based on the proposed budget for the remainder of 2015	$	761
	Less: liability for equity loss in AMSO, LLC at March 31, 2015		(252	)
	Maximum exposure to additional loss	$	509
	Summarized unaudited statements of operations of AMSO, LLCare as follows:
		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Operating expenses:
	General and administrative	$	119		$	123
	Research and development		1,462			1,512
	Total operating expenses		1,581			1,635
	Loss from operations and net loss	$	(1,581	)	$	(1,635	)

Equity

Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Equity	Note 6—Equity
	Changes in the components of equity were as follows:
		Three Months Ended
		31-Mar-15
		Attributable to Genie			Noncontrolling Interests			Total
		(in thousands)
	Balance, December 31, 2014	$	125,021		$	(5,678	)	$	119,343
	Dividends on preferred stock		(370	)		—			(370	)
	Dividends declared on common stock ($0.06 per share)		(1,474	)		—			(1,474	)
	Restricted Class B common stock purchased from employees		(22	)		—			(22	)
	Stock-based compensation		1,138			—			1,138
	Comprehensive loss:
	Net loss		(2,010	)		(420	)		(2,430	)
	Foreign currency translation adjustments		(62	)		6			(56	)
	Comprehensive loss		(2,072	)		(414	)		(2,486	)
	Balance, March 31, 2015	$	122,221		$	(6,092	)	$	116,129
	Dividend Payments
	On February 15, 2015, the Company paid a quarterly Base Dividend of $0.1594 per share on its Series 2012-A Preferred Stock (“Preferred Stock”) for the fourth quarter of 2014. On April 16, 2015, the Company’s Board of Directors declared a quarterly Base Dividend of $0.1594 per share on the Preferred Stock for the first quarter of 2015. The dividend will be paid on or about May 15, 2015 to stockholders of record as of the close of business on May 6, 2015. The aggregate dividends declared on the Preferred Stock in the three months ended March 31, 2015 and 2014 were $0.4 million and $0.3 million, respectively, and the aggregate dividends paid in the three months ended March 31, 2015 and 2014 were $0.4 million and $0.3 million, respectively.
	On March 31, 2015, the Company paid a quarterly dividend of $0.06 per share on its Class A common stock and Class B common stock for the fourth quarter of 2014 in the aggregate amount of $1.5 million. No dividend was paid on the Company’s Class A common stock and Class B common stock in the three months ended March 31, 2014. In May 2015, the Company’s Board of Directors declared a quarterly dividend of $0.06 per share on its Class A common stock and Class B common stock for the first quarter of 2015. The dividend will be paid on or about May 22, 2015 to stockholders of record as of the close of business on May 15, 2015.
	Stock-Based Compensation
	On May 5, 2015, the Company’s stockholders approved an amendment and restatement to the Company’s 2011 Stock Option and Incentive Plan that increased the number of shares of the Company’s Class B common stock available for the grant of awards thereunder by an additional 180,000 shares. At May 7, 2015, the Company had 1.3 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.
	On May 5, 2015, the Compensation Committee of the Company’s Board of Directors approved the grant of deferred stock units in GRE to certain of the Company’s officers and employees. Howard S. Jonas, the Company’s Chairman and Chief Executive Officer, was granted deferred stock units representing 2.8% of the outstanding equity in GRE, Avi Goldin, the Company’s Chief Financial Officer and Executive Vice President - Finance was granted deferred stock units representing 0.2% of the outstanding equity in GRE, Michael Stein, the Company’s Executive Vice President and the Chief Executive Officer and a Director of GRE was granted deferred stock units representing 0.3% of the outstanding equity in GRE, and the other employees were granted deferred stock units representing 0.6% of the outstanding equity in GRE. The deferred stock units will be granted on or about July 23, 2015, and shall vest in equal amounts on the first, second and third anniversaries of the date of grant.
	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 7.0 million shares of the Company’s Class B common stock. There were no repurchases under this program in the three months ended March 31, 2015 and 2014. At March 31, 2015, 6.9 million shares remained available for repurchase under the stock repurchase program.
	Variable Interest Entities
	In 2011, an employee of IDT Corporation (“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 a network of independent 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 since the acquisition of the interest in CCE, DAD and Tari, it had the power to direct the activities of these entities 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 GRE 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) amounts related to 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:
		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Net income (loss):
	CCE	$	26		$	(20	)
	DAD	$	(130	)	$	(7	)
	Tari	$	—		$	(13	)
	Aggregate funding repaid to (provided by) the Company, net	$	313		$	(197	)
	Summarized combined balance sheet amounts related to CCE, DAD and Tari are as follows:
		31-Mar-15			December 31,
					2014
		(in thousands)
	Assets
	Cash and cash equivalents	$	1		$	77
	Restricted cash		100			20
	Trade accounts receivable		1,761			1,873
	Prepaid expenses		392			480
	Other current assets		58			178
	Other assets		459			459
	Total assets	$	2,771		$	3,087
	Liabilities and noncontrolling interests
	Current liabilities	$	581		$	480
	Due to IDT Energy		972			1,285
	Noncontrolling interests		1,218			1,322
	Total liabilities and noncontrolling interests	$	2,771		$	3,087
	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.

Loss_Per_Share

Loss Per Share	3 Months Ended
	Mar. 31, 2015
Loss Per Share [Abstract]
Loss Per Share	Note 7—Loss Per Share
	Basic earnings per share is computed by dividing net income or loss attributable to all classes of common stockholders of the Company by the weighted average number of shares of all classes of common stock outstanding during the applicable period. Diluted earnings per share is computed in the same manner as basic earnings per share, except that the number of shares is increased to include restricted stock still subject to risk of forfeiture and to assume exercise of potentially dilutive stock options using the treasury stock method, unless the effect of such increase is anti-dilutive.
	The following shares were excluded from the diluted loss per share computation because their inclusion would have been anti-dilutive:
		March 31,
		2015		2014
		(in thousands)
	Stock options		436		3,440
	Non-vested restricted Class B common stock		2,453		156
	Shares excluded from the calculation of diluted earnings per share		2,889		3,596
	The diluted loss per share equals basic loss per share in the three months ended March 31, 2015 and 2014 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, subject to certain conditions and exercisable between November 2017 and February 2018, 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. 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, Afek and Genie Mongolia have the right to exchange the restricted stock, upon vesting of such shares, into shares of the Company’s Class B common stock. In addition, IDT Energy has the right to issue shares of the Company’s Class B common stock or pay cash to satisfy its obligations to issue common stock of IDT Energy upon the vesting of the deferred stock units it previously granted to employees and directors of the Company. These exchanges and issuances, if elected, would be based on the relative fair value of the shares exchanged or to be issued. 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.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Note 8—Related Party Transactions
	The Company was formerly a subsidiary of IDT. On October 28, 2011, the Company was spun-off by IDT (the “Spin-Off”). The Company entered into various agreements with IDT prior to the Spin-Off including a Transition Services Agreement, which provides for certain services to be performed by the Company and IDT.
	Following the Spin-Off, IDT charges the Company for services it provides pursuant to the Transition Services Agreement. The charges for these services are included in “Selling, general and administrative” expense in the consolidated statements of operations. Also, 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” expenses.
		Three Months Ended
		March 31,
		2015		2014
		(in thousands)
	Amount IDT charged the Company	$	620	$	779
	Amount the Company charged IDT	$	139	$	139

Business_Segment_Information

Business Segment Information	3 Months Ended
	Mar. 31, 2015
Business Segment Information [Abstract]
Business Segment Information	Note 9—Business Segment Information
	The Company owns 99.3% of its subsidiary, GEIC, which owns 100% of GRE and 92% of GOGAS. The Company has three reportable business segments: GRE, GOGAS and Afek. GRE operates REPs including IDT Energy and Residents Energy, and energy brokerage and marketing services. Its REP businesses resell electricity and natural gas to residential and small business customers primarily in the Eastern United States. GOGAS is an oil and gas exploration company. The GOGAS segment is comprised of early stage oil shale projects including (1) an 89.8% interest in Genie Mongolia, an oil shale exploration project in Central Mongolia, (2) AMSO, which holds and manages a 42.8% interest in AMSO, LLC, an oil shale development project in Colorado, and (3) an 87.4% interest in IEI, an oil shale development project in Israel. The Company has an 88.1% interest in Afek, which operates an oil and gas exploration project in the southern portion of the Golan Heights in Northern Israel. On May 5, 2015, the Compensation Committee of the Company’s Board of Directors approved the grant of deferred stock units in GRE representing 3.9% of the outstanding equity in GRE (see Note 1). IDT Energy has outstanding deferred stock units granted to directors and employees that represent an interest of 1.2% of the equity of IDT Energy. 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.
	Afek was included in the GOGAS segment from its inception until December 31, 2014. Beginning in the first quarter of 2015, Afek is a separate reportable segment. Comparative results have been reclassified and restated as if Afek was a separate segment in all periods presented.
	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)	GRE			GOGAS			Afek			Corporate			Total
	Three Months Ended March 31, 2015
	Revenues	$	74,429		$	—		$	—		$	—		$	74,429
	Income (loss) from operations		3,505			(904	)		(1,799	)		(2,517	)		(1,715	)
	Research and development		—			651			52			—			703
	Exploration		—			—			1,573			—			1,573
	Three Months Ended March 31, 2014
	Revenues	$	130,348		$	—		$	—		$	—		$	130,348
	Loss from operations		(909	)		(1,520	)		(917	)		(3,147	)		(6,493	)
	Research and development		—			1,187			—			—			1,187
	Exploration		—			—			913			—			913
	Total assets for the business segments of the Company were as follows:
	(in thousands)	GRE			GOGAS			Afek			Corporate			Total
	Total assets:
	31-Mar-15	$	83,245		$	41,937		$	10,424		$	18,002		$	153,608
	31-Dec-14	$	78,254		$	48,899		$	6,243		$	19,532		$	152,928

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 10—Commitments and Contingencies
	Legal Proceedings
	On March 13, 2014, named plaintiff, Anthony Ferrare, commenced a putative class-action lawsuit against IDT Energy, Inc. in the Court of Common Pleas of Philadelphia County, Pennsylvania. The complaint was served on IDT Energy on July 16, 2014. The named plaintiff filed the suit on behalf of himself and other former and current electric customers of IDT Energy in Pennsylvania with variable rate plans, whom he contends were injured as a result of IDT Energy’s allegedly unlawful sales and marketing practices. On August 7, 2014, IDT Energy removed the case to the United States District Court for the Eastern District of Pennsylvania. On October 20, 2014, IDT Energy moved to stay or, alternatively, dismiss the complaint, as amended, by the named plaintiff. On November 10, 2014, the named plaintiff opposed IDT Energy’s motion to dismiss and IDT Energy filed a reply memorandum of law in further support of its motion to dismiss. The parties are now awaiting a decision from the Court. IDT Energy believes that the claims in this lawsuit are without merit and intends to vigorously defend the action.
	On June 20, 2014, the Pennsylvania Attorney General’s Office (“AG”) and the Acting Consumer Advocate (“OCA”) filed a Joint Complaint against IDT Energy, Inc. with the Pennsylvania Public Utility Commission. In the Joint Complaint, the AG and the OCA allege, among other things, various violations of Pennsylvania’s Unfair Trade Practices and Consumer Protection Law, the Telemarketing Registration Act and the Pennsylvania Public Utility Commission’s regulations. IDT Energy is continuing to defend against the action. A litigation schedule has been established for the proceeding, and a final decision on the matter is not expected until early 2016. IDT Energy denies that there is any merit to the action brought by the OCA and AG.
	On July 2, 2014, named plaintiff, Louis McLaughlin, filed a putative class-action lawsuit against IDT Energy, Inc. in the United States District Court for the Eastern District of New York, contending that he and other class members were injured as a result of IDT Energy’s allegedly unlawful sales and marketing practices. The named plaintiff filed the suit on behalf of himself and two subclasses: all IDT Energy customers who were charged a variable rate for their energy from July 2, 2008, and all IDT Energy customers who participated in IDT Energy’s rebate program from July 2, 2008. On December 19, 2014, IDT Energy filed a motion to dismiss the complaint. The named plaintiff filed opposition papers to IDT Energy’s motion to dismiss on March 13, 2015, and on April 10, 2015, IDT Energy filed its reply in further support of its motion to dismiss. IDT Energy believes that the claims in this lawsuit are without merit and intends to vigorously defend the action.
	On July 15, 2014, named plaintiff, Kimberly Aks, commenced a putative class-action lawsuit against IDT Energy, Inc. in New Jersey Superior Court, Essex County, contending that she and other class members were injured as a result of IDT Energy’s alleged unlawful sales and marketing practices. The named plaintiff filed the suit on behalf of herself and all other New Jersey residents who were IDT Energy customers at any time between July 11, 2008 and the present. On November 6, 2014, the Court denied IDT Energy’s motion to dismiss the complaint. The parties are currently engaged in discovery. IDT Energy believes that the claims in this lawsuit are without merit and intends to vigorously defend the action.
	At March 31, 2015, the Company had an aggregate of $1.0 million accrued for the complaints and lawsuits described above. At March 31, 2015, the Company’s reasonably possible liability above the aggregate amount that had been accrued for these matters was $0.3 million.
	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 Commitments
	The Company had purchase commitments of $7.7 million at March 31, 2015.
	Renewable Energy Credits
	GRE must obtain a certain percentage or amount of its power supply from renewable energy sources in order to meet the requirements of renewable portfolio standards in the states in which it operates. This requirement may be met by obtaining renewable energy credits that provide evidence that electricity has been generated by a qualifying renewable facility or resource. At March 31, 2015, GRE had commitments to purchase renewable energy credits of $28.7 million.
	Tax Audits
	The Company is subject to audits in various jurisdictions for various taxes. Amounts asserted by taxing authorities or the amount ultimately assessed against the Company could be greater than accrued amounts. 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.
	Letters of Credit
	At March 31, 2015, the Company had letters of credit outstanding totaling $7.0 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 at March 31, 2015 expire as follows: $5.5 million in the year ending March 31, 2016 and $1.5 million in June 2016.
	Performance Bonds
	GRE has performance bonds issued through a third party for the benefit of various states in order to comply with the states’ financial requirements for REPs. At March 31, 2015, GRE had aggregate performance bonds of $12.4 million outstanding.
	Other Contingencies
	Since 2009, IDT Energy has been a party to a Preferred Supplier Agreement with BP Energy Company (“BP”). The agreement’s termination date is June 30, 2015. The Company is negotiating with BP and other suppliers and expects to have an agreement in place by 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 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 March 31, 2015, the Company was in compliance with such covenants. At March 31, 2015, restricted cash—short-term of $1.5 million and trade accounts receivable of $37.2 million were pledged to BP as collateral for the payment of IDT Energy’s trade accounts payable to BP of $11.6 million at March 31, 2015.

Revolving_Line_of_Credit

Revolving Line of Credit	3 Months Ended
	Mar. 31, 2015
Revolving Line of Credit [Abstract]
Revolving Line of Credit
	Note 11—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. In April 2015, the Loan Agreement was modified to extend the maturity date from April 30, 2015 to April 30, 2016. 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 March 31, 2015 and December 31, 2014, 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 March 31, 2015 and December 31, 2014, letters of credit of $7.0 million and $7.6 million, respectively, were outstanding.

Recently_Issued_Accounting_Sta

Recently Issued Accounting Standard Not Yet Adopted	3 Months Ended
	Mar. 31, 2015
Recently Issued Accounting Standard Not Yet Adopted [Abstract]
Recently Issued Accounting Standard Not Yet Adopted	Note 12—Recently Issued Accounting Standard Not Yet Adopted
	In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board jointly issued a comprehensive new revenue recognition standard that will supersede most of the current revenue recognition guidance under U.S. GAAP and International Financial Reporting Standards (“IFRS”). The goals of the revenue recognition project were to clarify and converge the revenue recognition principles under U.S. GAAP and IFRS and to develop guidance that would streamline and enhance revenue recognition requirements. The Company will adopt this standard on January 1, 2017. Entities have the option of using either a full retrospective or modified retrospective approach for the adoption of the standard. The Company is evaluating the impact that the standard will have on its consolidated financial statements. In April 2015, the FASB proposed a one-year deferral of the effective date for the new revenue recognition standard to annual reporting periods beginning after December 15, 2017, including interim reporting periods therein.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Measurements [Abstract]
Balance of assets and liabilities measured at fair value on a recurring basis		Level 1 (1)			Level 2 (2)		Level 3 (3)		Total
		(in thousands)
	31-Mar-15
	Assets:
	Derivative contracts	$	1,017		$	3,603	$	—	$	4,620
	Liabilities:
	Derivative contracts	$	297		$	4,680	$	—	$	4,977
	31-Dec-14
	Assets:
	Derivative contracts	$	1,001		$	1,376	$	—	$	2,377
	Liabilities:
	Derivative contracts	$	440		$	3,563	$	—	$	4,003
	(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)
	Balance, December 31, 2013	$	62
	Total losses (realized or unrealized) included in earnings in “Direct cost of revenues”		(62	)
	Balance, March 31, 2014	$	—
	The amount of total gains or 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	$	—

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments [Abstract]
Summarized volume of IDT Energy's outstanding	Commodity	Settlement Dates	Volume
	Electricity	May-15	16,000 MWh
	Electricity	Jun-15	38,720 MWh
	Electricity	Jul-15	340,400 MWh
	Electricity	Aug-15	310,800 MWh
	Electricity	Oct-15	52,800 MWh
	Electricity	Nov-15	48,000 MWh
	Electricity	Dec-15	132,000 MWh
	Electricity	Jan-16	176,000 MWh
	Electricity	Feb-16	184,800 MWh
	Natural gas	May-15	1,000,000 Dth
	Natural gas	Jul-15	3,645,000 Dth
	Natural gas	Aug-15	530,000 Dth
	Natural gas	Sep-15	225,000 Dth
	Natural gas	Oct-15	155,000 Dth
	Natural gas	Jan-16	2,342,500 Dth
	Natural gas	Jul-16	1,110,000 Dth
	Natural gas	Aug-16	800,000 Dth
Schedule of fair value of outstanding derivative instruments recorded as assets and liability	Asset Derivatives	Balance Sheet Location	31-Mar-15			December 31, 2014
			(in thousands)
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Other current assets	$	4,620		$	2,377
	Liability Derivatives	Balance Sheet Location	31-Mar-15			December 31,
						2014
			(in thousands)
	Derivatives not designated or not qualifying as hedging instruments:
	Energy contracts and options	Energy hedging contracts	$	4,977		$	4,003
Effects of derivative instruments on the consolidated statements of operations			Amount of Gain (Loss) Recognized on Derivatives
			Three Months Ended March 31,
	Derivatives not designated or not qualifying	Location of Gain (Loss)	2015			2014
	as hedging instruments	Recognized on Derivatives
			(in thousands)
	Energy contracts and options	Direct cost of revenues	$	(957	)	$	(35	)

Investment_in_American_Shale_O1

Investment in American Shale Oil, LLC (Tables)	3 Months Ended
	Mar. 31, 2015
Investment In American Shale Oil, Llc [Abstract]
Summary in the change in balance of the Company's investment in AMSO, LLC		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Balance, beginning of period	$	(252	)	$	(252	)
	Capital contributions		—			—
	Equity in the net loss of AMSO, LLC		—			—
	Balance, end of period	$	(252	)	$	(252	)
Maximum exposure to additional loss		(in thousands)
	AMSO’s committed investment in AMSO, LLC based on the proposed budget for the remainder of 2015	$	761
	Less: liability for equity loss in AMSO, LLC at March 31, 2015		(252	)
	Maximum exposure to additional loss	$	509
Summarized statements of operations AMSO, LLC		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Operating expenses:
	General and administrative	$	119		$	123
	Research and development		1,462			1,512
	Total operating expenses		1,581			1,635
	Loss from operations and net loss	$	(1,581	)	$	(1,635	)

Equity_Tables

Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Summary of changes in the components of equity		Three Months Ended
		31-Mar-15
		Attributable to Genie			Noncontrolling Interests			Total
		(in thousands)
	Balance, December 31, 2014	$	125,021		$	(5,678	)	$	119,343
	Dividends on preferred stock		(370	)		—			(370	)
	Dividends declared on common stock ($0.06 per share)		(1,474	)		—			(1,474	)
	Restricted Class B common stock purchased from employees		(22	)		—			(22	)
	Stock-based compensation		1,138			—			1,138
	Comprehensive loss:
	Net loss		(2,010	)		(420	)		(2,430	)
	Foreign currency translation adjustments		(62	)		6			(56	)
	Comprehensive loss		(2,072	)		(414	)		(2,486	)
	Balance, March 31, 2015	$	122,221		$	(6,092	)	$	116,129
Schedule of net income loss and aggregate net funding repaid or provided by company to variable interest entity		Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Net income (loss):
	CCE	$	26		$	(20	)
	DAD	$	(130	)	$	(7	)
	Tari	$	—		$	(13	)
	Aggregate funding repaid to (provided by) the Company, net	$	313		$	(197	)
Summarized statements of balance sheets of CCE and DAD		March 31,			December 31,
		2015			2014
		(in thousands)
	Assets
	Cash and cash equivalents	$	1		$	77
	Restricted cash		100			20
	Trade accounts receivable		1,761			1,873
	Prepaid expenses		392			480
	Other current assets		58			178
	Other assets		459			459
	Total assets	$	2,771		$	3,087
	Liabilities and noncontrolling interests
	Current liabilities	$	581		$	480
	Due to IDT Energy		972			1,285
	Noncontrolling interests		1,218			1,322
	Total liabilities and noncontrolling interests	$	2,771		$	3,087

Loss_Per_Share_Tables

Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Loss Per Share [Abstract]
Schedule of antidilutive shares excluded from computation of earnings per share		March 31,
		2015		2014
		(in thousands)
	Stock options		436		3,440
	Non-vested restricted Class B common stock		2,453		156
	Shares excluded from the calculation of diluted earnings per share		2,889		3,596

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Summary of related party transactions		Three Months Ended
		March 31,
		2015		2014
		(in thousands)
	Amount IDT charged the Company	$	620	$	779
	Amount the Company charged IDT	$	139	$	139

Business_Segment_Information_T

Business Segment Information (Tables)	3 Months Ended
	Mar. 31, 2015
Business Segment Information [Abstract]
Operating results for the business segments	(in thousands)	GRE			GOGAS			Afek			Corporate			Total
	Three Months Ended March 31, 2015
	Revenues	$	74,429		$	—		$	—		$	—		$	74,429
	Income (loss) from operations		3,505			(904	)		(1,799	)		(2,517	)		(1,715	)
	Research and development		—			651			52			—			703
	Exploration		—			—			1,573			—			1,573
	Three Months Ended March 31, 2014
	Revenues	$	130,348		$	—		$	—		$	—		$	130,348
	Loss from operations		(909	)		(1,520	)		(917	)		(3,147	)		(6,493	)
	Research and development		—			1,187			—			—			1,187
	Exploration		—			—			913			—			913
Summary of business segment aggregate assets	(in thousands)	GRE			GOGAS			Afek			Corporate			Total
	Total assets:
	31-Mar-15	$	83,245		$	41,937		$	10,424		$	18,002		$	153,608
	31-Dec-14	$	78,254		$	48,899		$	6,243		$	19,532		$	152,928

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2013	5-May-15
Basis of Presentation (Textual)
Exploration	$1,573		$913
Percentage of gas revenue generated in given period			59.00%		49.00%
Percentage of electricity revenue generated in given period		20.00%	45.00%	31.00%
Subsequent Event [Member] | Howard S. Jonas [Member]
Basis of Presentation (Textual)
Ownership interest of company						2.80%
Subsequent Event [Member] | Officers and employees [Member]
Basis of Presentation (Textual)
Ownership interest of company						0.60%
Subsequent Event [Member] | Avi Goldin [Member]
Basis of Presentation (Textual)
Ownership interest of company						0.20%
Subsequent Event [Member] | Michael Stein [Member]
Basis of Presentation (Textual)
Ownership interest of company						0.30%
Genie Energy International Corporation [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	99.30%
Genie Retail Energy [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	100.00%
Genie Oil and Gas, Inc [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	92.00%
Afek Oil and Gas, Ltd. [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	88.10%
Exploration			$900
Genie Mongolia [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	89.80%
American Shale Oil L.L.C [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	42.80%
Israel Energy Initiatives, Ltd. [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	87.40%
IDT Energy [Member]
Basis of Presentation (Textual)
Ownership interest of company	1.20%

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Recurring [Member], USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Assets:
Derivative contracts	$4,620		$2,377
Liabilities:
Derivative contracts	4,977		4,003
Level 1 (1) [Member]
Assets:
Derivative contracts	1,017	[1]	1,001	[1]
Liabilities:
Derivative contracts	297	[1]	440	[1]
Level 2 (2) [Member]
Assets:
Derivative contracts	3,603	[2]	1,376	[2]
Liabilities:
Derivative contracts	4,680	[2]	3,563	[2]
Level 3 (3) [Member]
Assets:
Derivative contracts		[3]		[3]
Liabilities:
Derivative contracts		[3]		[3]
[1]	quoted prices in active markets for identical assets or liabilities
[2]	observable inputs other than quoted prices in active markets for identical assets and liabilities
[3]	no observable pricing inputs in the market

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
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	$62
Total losses (realized or unrealized) included in earnings in "Direct cost of revenues"	-62
Balance, end of period, Assets
The amount of total gains or 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

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details Textual) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2011	Mar. 31, 2015	Dec. 31, 2014
Fair Value Measurements (Textual)
Financial instrument included in other assets		$1.50	$1.50
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

Derivative_Instruments_Details

Derivative Instruments (Details)	3 Months Ended
	Mar. 31, 2015
Electricity [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	May-15
Volume	16,000 MWh
Electricity 1 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Jun-15
Volume	38,720 MWh
Electricity 2 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Jul-15
Volume	340,400 MWh
Electricity 3 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Aug-15
Volume	310,800 MWh
Electricity 4 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Oct-15
Volume	52,800 MWh
Electricity 5 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Nov-15
Volume	48,000 MWh
Electricity 6 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Dec-15
Volume	132,000 MWh
Electricity 7 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Jan-16
Volume	176,000 MWh
Electricity 8 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Electricity
Settlement Dates	Feb-16
Volume	184,800 MWh
Natural Gas [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	May-15
Volume	1,000,000 Dth
Natural Gas 1 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Jul-15
Volume	3,645,000 Dth
Natural Gas 2 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Aug-15
Volume	530,000 Dth
Natural Gas 3 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Sep-15
Volume	225,000 Dth
Natural Gas 4 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Oct-15
Volume	155,000 Dth
Natural Gas 5 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Jan-16
Volume	2,342,500 Dth
Natural Gas 6 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Jul-16
Volume	1,110,000 Dth
Natural Gas 7 [Member]
Summarized volume of IDT Energy's outstanding
Commodity	Natural gas
Settlement Dates	Aug-16
Volume	800,000 Dth

Derivative_Instruments_Details1

Derivative Instruments (Details 1) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Liability Derivatives, not designated or not qualifying as hedging instruments	$4,977	$4,003
Energy contracts and options [Member] | 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	4,620	2,377
Energy contracts and options [Member] | Energy hedging contracts [Member]
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Liability Derivatives, not designated or not qualifying as hedging instruments	$4,977	$4,003

Derivative_Instruments_Details2

Derivative Instruments (Details 2) (Energy contracts and options [Member], Direct cost of revenues [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
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	($957)	($35)

Afek_Oil_and_Gas_Exploration_A1

Afek Oil and Gas Exploration Activities (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	sqkm
Oil and Gas Exploration Activities (Textual)
Capitalized exploration costs - unproved oil and gas property	$4,308
Exploration costs	$1,573	$913
Petroleum exploration license covering area	396.5

Investment_in_American_Shale_O2

Investment in American Shale Oil, LLC (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Summary in the change in balance of the Company's investment in AMSO, LLC
Balance, beginning of period	($252)	($252)
Capital contributions
Equity in the net loss of AMSO, LLC
Balance, end of period	($252)	($252)

Investment_in_American_Shale_O3

Investment in American Shale Oil, LLC (Details 1) (USD $)	Mar. 31, 2015
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 proposed budget for the remainder of 2015	$761
Less: liability for equity loss in AMSO, LLC at March 31, 2015	-252
Maximum exposure to additional loss	$509

Investment_in_American_Shale_O4

Investment in American Shale Oil, LLC (Details 2) (AMSO, LLC [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
AMSO, LLC [Member]
Operating expenses:
General and administrative	$119	$123
Research and development	1,462	1,512
Total operating expenses	1,581	1,635
Loss from operations and net loss	($1,581)	($1,635)

Investment_in_American_Shale_O5

Investment in American Shale Oil, LLC (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Schedule of investment (Textual)
Maximum exposure to additional loss	$509,000
AMSO, LLC [Member]
Schedule of investment (Textual)
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
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	80,000,000
Amount of expenditures to be funded by holding company not funded	3,800,000
New equity method investment ownership percentage after dilution	42.80%
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	30.00%
Amount of expenditures not allocated to holding company after dilution		$11,600,000
TOTAL S.A. [Member]
Schedule of investment (Textual)
New equity method investment ownership percentage after dilution	57.20%
New percentage of funding for approved expenditures in excess of $100 million	70.00%

Equity_Details

Equity (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	$119,343
Dividends on preferred stock	-370
Dividends declared on common stock ($0.06 per share)	-1,474
Restricted Class B common stock purchased from employees	-22
Stock Based Compensation	1,138
Comprehensive loss:
Net loss	-2,430	-7,147
Foreign currency translation adjustments	-56	-30
Comprehensive loss	-2,486	-7,177
Balance, March 31, 2015	116,129
Attributable to Genie [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	125,021
Dividends on preferred stock	-370
Dividends declared on common stock ($0.06 per share)	-1,474
Restricted Class B common stock purchased from employees	-22
Stock Based Compensation	1,138
Comprehensive loss:
Net loss	-2,010
Foreign currency translation adjustments	-62
Comprehensive loss	-2,072
Balance, March 31, 2015	122,221
Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	-5,678
Dividends on preferred stock
Dividends declared on common stock ($0.06 per share)
Restricted Class B common stock purchased from employees
Stock Based Compensation
Comprehensive loss:
Net loss	-420
Foreign currency translation adjustments	6
Comprehensive loss	-414
Balance, March 31, 2015	($6,092)

Equity_Details_1

Equity (Details 1) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income (loss):
Aggregate funding repaid to (provided by) the Company, net	$313	($197)
CCE [Member]
Net income (loss):
Net (loss) income	26	-20
DAD [Member]
Net income (loss):
Net (loss) income	-130	-7
Tari [Member]
Net income (loss):
Net (loss) income		($13)

Equity_Details_2

Equity (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	$2,771	$3,087
Total liabilities and noncontrolling interests	2,771	3,087
Cash and cash equivalents [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	1	77
Restricted cash [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	100	20
Trade accounts receivable [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	1,761	1,873
Prepaid expenses [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	392	480
Other current assets [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	58	178
Other assets [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total assets	459	459
Current Liability [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total liabilities and noncontrolling interests	581	480
Due to IDT Energy [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total liabilities and noncontrolling interests	972	1,285
Noncontrolling Interests [Member]
Summarized combined balance sheets of CCE, DAD and Tari
Total liabilities and noncontrolling interests	$1,218	$1,322

Equity_Details_Textual

Equity (Details Textual) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended	1 Months Ended		0 Months Ended
	Mar. 31, 2015	Dec. 31, 2011	Feb. 15, 2015	Mar. 31, 2014	Apr. 16, 2015	Mar. 31, 2015	31-May-15	5-May-15	Mar. 11, 2013	7-May-15
Equity (Textual)
Common stock dividend	$1,474,000
Number of stock authorized to be repurchased
Remaining number of shares available for repurchase	6,900,000					6,900,000
Subsequent Event [Member] | Chief Executive Officer [Member]
Equity (Textual)
Ownership interest of company								2.80%
Subsequent Event [Member] | Officer [Member]
Equity (Textual)
Ownership interest of company								0.60%
Subsequent Event [Member] | Chief Financial Officer [Member]
Equity (Textual)
Ownership interest of company								0.20%
Subsequent Event [Member] | Executive Vice President [Member]
Equity (Textual)
Ownership interest of company								0.30%
DAD [Member]
Equity (Textual)
Ownership interest		100.00%
Preferred Stock [Member]
Equity (Textual)
Company paid a pro-rated Base Dividend on Series 2012-A Preferred Stock			$0.16
Preferred stock dividend declared	400,000			300,000
Preferred dividend paid	400,000			300,000
Preferred Stock [Member] | Subsequent Event [Member]
Equity (Textual)
Company's Board of Directors declared a quarterly Base Dividend					$0.16
Dividend declared, date to be paid					15-May-15
Dividend declared, record date					6-May-15
Common Class A [Member]
Equity (Textual)
Cash dividend paid						$0.06
Common stock dividend
Common Class A [Member] | Subsequent Event [Member]
Equity (Textual)
Dividends paid, amount per share							$0.06
Dividend declared, date to be paid							22-May-15
Dividend declared, record date							15-May-15
Common Class B [Member]
Equity (Textual)
Cash dividend paid						$0.06
Common stock dividend						$1,500,000
Number of stock authorized to be repurchased									7,000,000
Common Class B [Member] | Subsequent Event [Member]
Equity (Textual)
Dividends paid, amount per share							$0.06
Dividend declared, date to be paid							22-May-15
Dividend declared, record date							15-May-15
Common Class B [Member] | 2011 Stock Option and Incentive Plan [Member] | Subsequent Event [Member]
Equity (Textual)
Common stock reserved for future issuance										1,300,000
Shares available for future grants, (Shares)										200,000
Additional number of shares granted								180,000

Loss_Per_Share_Details

Loss Per Share (Details)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Schedule of antidilutive shares excluded from computation of earnings per share
Shares excluded from the calculation of diluted earnings per share	2,889	3,596
Stock options [Member]
Schedule of antidilutive shares excluded from computation of earnings per share
Shares excluded from the calculation of diluted earnings per share	436	3,440
Non-vested restricted Class B common stock [Member]
Schedule of antidilutive shares excluded from computation of earnings per share
Shares excluded from the calculation of diluted earnings per share	2,453	156

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Summary of related party transactions
Amount IDT charged the Company	$620	$779
Amount the Company charged IDT	$139	$139

Business_Segment_Information_D

Business Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating results for the business segments
Revenues	$74,429	$130,348
Income (loss) from operations	-1,715	-6,493
Research and development	703	1,187
Exploration	1,573	913
Genie Retail Energy [Member]
Operating results for the business segments
Revenues	74,429	130,348
Income (loss) from operations	3,505	-909
Research and development
Exploration
Genie Oil and Gas [Member]
Operating results for the business segments
Revenues
Income (loss) from operations	-904	-1,520
Research and development	651	1,187
Exploration
Afek Oil And Gas Ltd [Member]
Operating results for the business segments
Revenues
Income (loss) from operations	-1,799	-917
Research and development	52
Exploration	1,573	913
Corporate [Member]
Operating results for the business segments
Revenues
Income (loss) from operations	-2,517	-3,147
Research and development
Exploration

Business_Segment_Information_D1

Business Segment Information (Details 1) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Summary total assets for the business segments
Total assets	$153,608	$152,928
Genie Retail Energy [Member]
Summary total assets for the business segments
Total assets	83,245	78,254
Genie Oil and Gas [Member]
Summary total assets for the business segments
Total assets	41,937	48,899
Afek Oil And Gas Ltd [Member]
Summary total assets for the business segments
Total assets	10,424	6,243
Corporate [Member]
Summary total assets for the business segments
Total assets	$18,002	$19,532

Business_Segment_Information_D2

Business Segment Information (Details Textual)	3 Months Ended
	Mar. 31, 2015	5-May-15
	Segment
Business Segment Information (Textual)
Number of reportable segments	3
GEIC [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	99.30%
Genie Retail Energy [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	100.00%
Genie Retail Energy [Member] | Subsequent Event [Member]
Business Segment Information (Textual)
Ownership interest of company		3.90%
IDT Energy [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	100.00%
GOGAS [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	92.00%
AMSO, LLC [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	42.80%
Israel Energy Initiatives Ltd [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	87.40%
Afek Oil and Gas Ltd [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	88.10%
Genie Mongolia [Member]
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	89.80%

Commitments_and_Contingencies_

Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Commitments and Contingencies (Textual)
Line of credit facility, amount outstanding	$7	$7.60
Purchase and other commitments	7.7
Line of credit facility expiration, Description	The letters of credit outstanding totaling $7.0 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 at March 31, 2015 expire as follows: $5.5 million in the year ending March 31, 2016 and $1.5 million in June 2016.
Aggregate amount accrued for complaints and lawsuits	1
Reasonably possible loss contingency above accrual amount	0.3
Genie Retail Energy [Member]
Commitments and Contingencies (Textual)
Aggregate performance bond outstanding	12.4
Purchase of renewable energy credit	28.7
BP [Member]
Commitments and Contingencies (Textual)
Payment of trade accounts payable to BP Energy	11.6
Trade Accounts Receivable [Member]
Commitments and Contingencies (Textual)
Assets pledged as collateral to BP Energy	37.2
Restricted Cash [Member]
Commitments and Contingencies (Textual)
Assets pledged as collateral to BP Energy	$1.50

Revolving_Line_of_Credit_Detai

Revolving Line of Credit (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Apr. 23, 2012
Revolving Line of Credit (Textual)
Line of credit facility, amount outstanding	$7	$7.60
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-16
Quarterly unused commitment fee	0.08%
Line of credit facility, frequency of payment and payment terms	Interest is payable at least every three months
Cash collateral for line of credit	$10