Genie Energy (GNE) 10-Q 10 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 07, 2019
Entity Registrant Name	Genie Energy Ltd.
Entity Central Index Key	0001528356
Trading Symbol	GNE
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Class A common stock
Entity Common Stock, Shares Outstanding		1,574,326
Class B common stock
Entity Common Stock, Shares Outstanding		25,517,003

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 37,540	$ 41,601
Restricted cash—short-term	6,058	1,653
Trade accounts receivable, net of allowance for doubtful accounts of $2,139 and $2,003 at March 31, 2019 and December 31, 2018, respectively	41,921	35,920
Inventory	9,685	9,893
Prepaid expenses	4,874	6,167
Other current assets	2,126	2,670
Total current assets	102,204	97,904
Property and equipment, net	4,371	4,301
Goodwill	13,023	11,082
Other intangibles, net	8,509	6,321
Investment in equity method investees	1,470	2,208
Restricted cash-long-term	865	943
Deferred income tax assets, net	13,184	15,625
Other assets	10,610	8,480
Total assets	154,236	146,864
Current liabilities:
Notes payable	918	923
Trade accounts payable	20,044	18,508
Accrued expenses	24,402	25,242
Income taxes payable	1,923	1,463
Due to IDT Corporation	138	234
Other current liabilities	3,082	4,416
Total current liabilities	50,507	50,786
Revolving line of credit	2,516	2,516
Other liabilities	2,842	900
Total liabilities	55,865	54,202
Commitments and contingencies
Genie Energy Ltd. Stockholders' equity:
Preferred stock, $0.01 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, 2019 and December 31, 2018	19,743	19,743
Additional paid-in capital	137,884	136,629
Treasury stock, at cost, consisting of 250 shares of Class B common stock at March 31, 2019 and December 31, 2018	(1,624)	(1,624)
Accumulated other comprehensive income	2,881	2,591
Accumulated deficit	(50,558)	(53,939)
Total Genie Energy Ltd. stockholders' equity	108,599	103,671
Noncontrolling interests	(10,228)	(11,009)
Total equity	98,371	92,662
Total liabilities and equity	154,236	146,864
Class A common stock
Genie Energy Ltd. Stockholders' equity:
Common stock, value	16	16
Total equity	16	16
Class B common stock
Genie Energy Ltd. Stockholders' equity:
Common stock, value	257	255
Total equity	$ 257	$ 255

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts, trade accounts receivable (in dollars)	$ 2,139	$ 2,003
Preferred stock, par value (In dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Series 2012-A Preferred Stock
Designated shares	8,750,000	8,750,000
Preferred stock, shares issued	2,322,000	2,322,000
Preferred stock, shares outstanding	2,322,000	2,322,000
Class A common stock
Common stock, par value (In dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	1,574,000	1,574,000
Common stock, shares outstanding	1,574,000	1,574,000
Class B common stock
Common stock, par value (In dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	25,767,000	25,544,000
Common stock, shares outstanding	25,517,000	25,294,000
Treasury stock, shares	250	250

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenues:
Electricity		$ 62,614	$ 65,335
Natural gas		18,706	23,428
Other		5,297	505
Total revenues		86,617	89,268
Cost of revenues		61,026	64,810
Gross profit		25,591	24,458
Operating expenses and losses:
Selling, general and administrative	[1]	15,708	17,098
Research and development		49
Exploration			227
Income from operations		9,834	7,133
Interest income		93	81
Interest expense		(140)	(92)
Equity in the net loss in equity method investees, net		(797)	(506)
Other income, net		73	42
Income before income taxes		9,063	6,658
Provision for income taxes		(2,903)	(799)
Net income		6,160	5,859
(Net income) loss attributable to noncontrolling interests		91	(295)
Net income attributable to Genie Energy Ltd.		6,069	6,154
Dividends on preferred stock		(370)	(370)
Net income attributable to Genie Energy Ltd. common stockholders		$ 5,699	$ 5,784
Earnings per share attributable to Genie Energy Ltd. common stockholders:
Basic		$ 0.21	$ 0.24
Diluted		$ 0.21	$ 0.24
Weighted-average number of shares used in calculation of earnings per share:
Basic		26,532	24,239
Diluted		27,240	24,295
Dividends declared per common share		$ 0.075	$ 0.075
[1]	Stock-based compensation included in selling, general and administrative expenses

Consolidated Statements of Op_2

Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Stock-based compensation included in selling, general and administrative expenses	$ 448	$ 1,347

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 6,160	$ 5,859
Other comprehensive income:
Foreign currency translation adjustments	96	59
Comprehensive income	6,256	5,918
Comprehensive income attributable to noncontrolling interests	103	251
Comprehensive income attributable to Genie Energy Ltd.	$ 6,359	$ 6,169

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Class A common stock	Class B common stock	Preferred Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit	Noncontrolling Interests
Beginning Balance at Dec. 31, 2017	$ 67,128	$ 16	$ 236	$ 19,743	$ 130,870	$ (2,428)	$ 3,045	$ (67,469)	$ (16,885)
Beginning Balance, shares at Dec. 31, 2017		1,574	23,601	2,322
Dividends on preferred stock	(370)							(370)
Dividends on common stock ($0.075 per share)	(1,865)							(1,865)
Stock-based compensation	889				889
Stock-based compensation, Shares			25
Options issued to Howard S. Jonas
Receivable for issuance of equity written-off
Other comprehensive income	59						15		44
Net income	5,859							6,154	(295)
Ending Balance at Mar. 31, 2018		$ 16	$ 236	$ 19,743	131,759	(2,428)	3,060	(63,550)	(17,136)
Ending Balance, shares at Mar. 31, 2018		1,574	23,626	2,322
Beginning Balance at Dec. 31, 2018	92,662	$ 16	$ 255	$ 19,743	136,629	(1,624)	2,591	(53,939)	(11,009)
Beginning Balance, shares at Dec. 31, 2018		1,574	25,544	2,322
Adoption of ASU 2018-07 ($0.1594 per share)					312			(312)
Dividends on preferred stock	(370)							(370)
Dividends on common stock ($0.075 per share)	(2,006)							(2,006)
Stock-based compensation	448		$ 2		446
Stock-based compensation, Shares			198
Exercise of stock options	172				172
Exercise of stock options, Shares			25
Options issued to Howard S. Jonas	325				325
Options issued to Howard S. Jonas, shares
Receivable for issuance of equity written-off	884								884
Other comprehensive income	96						290		194
Net income	6,160							6,069	91
Ending Balance at Mar. 31, 2019	$ 98,371	$ 16	$ 257	$ 19,743	$ 137,884	$ (1,624)	$ 2,881	$ (50,558)	$ (10,228)
Ending Balance, shares at Mar. 31, 2019		1,574	25,767	2,322

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities
Net income	$ 6,160	$ 5,859
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	921	594
Deferred income taxes	2,442	113
Provision for doubtful accounts receivable	72	295
Gain on sale of property and equipment		(18)
Stock-based compensation	448	1,347
Equity in the net loss in equity method investees	797	506
Change in assets and liabilities:
Trade accounts receivable	(3,554)	3,886
Inventory	208	(1,690)
Prepaid expenses	1,320	511
Other current assets and other assets	(1,041)	2,903
Trade accounts payable, accrued expenses and other current liabilities	(1,115)	(6,328)
Due to IDT Corporation	(100)	(94)
Income taxes payable	460	754
Net cash provided by operating activities	7,018	8,638
Investing activities
Capital expenditures	(325)	(344)
Proceeds from sale of property and equipment		62
Payments for business acquisition, net of cash acquired	(1,852)
Investments in notes receivables	(177)
Repayment of notes receivable	122	54
Net cash used in investing activities	(2,232)	(228)
Financing activities
Dividends paid	(2,377)	(2,235)
Repayment of short-term debt-Lumo Energia	(2,260)
Exercise of stock options	172
Repayment of notes payable	20
Net cash used in financing activities	(4,485)	(2,235)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(35)	(19)
Net increase in cash, cash equivalents, and restricted cash	266	6,156
Cash, cash equivalents, and restricted cash at beginning of period	44,197	31,927
Cash, cash equivalents, and restricted cash at end of period	44,463	38,083
Supplemental Schedule of Non-Cash Financing Activities
Liability incurred for acquisitions	$ 2,260

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2019
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 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, 2019 December 31, 2019 . The balance sheet at December 31, 2018 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, 2018, as filed with the U.S. Securities and Exchange Commission (the “SEC”). The Company owns 99.3 100 100 60 97 GRE owns and operates retail energy providers (“REPs”), including IDT Energy, Inc. (“IDT Energy”), Residents Energy, Inc. (“Residents Energy”), Town Square Energy, and Mirabito Natural Gas (“Mirabito”). GRE's REP businesses resell electricity and natural gas to residential and small business customers primarily in the Eastern and Midwestern United States. Genie Retail Energy International, LLC ("GREI") holds the Company's interest in its joint venture that serves retail customers in the United Kingdom ("U.K.") and its venture in Japan, which recently launched commercial operations. In January 2019, the Company acquired an 80 5 GES oversees Diversegy LLC (" "), a retail energy advisory and brokerage company that serves commercial and industrial customers throughout the United States ("U.S.") and manages 60 Prism (see Note 5 GOGAS is an oil and gas exploration company and owns an interest in a contracted drilling services operation. GOGAS holds an 86.1 37.5 GREI and GES have outstanding deferred stock units granted to officers, employees and a contractor that represent an aggregate interest of 4.0 4.5 2020 Seasonality and Weather The weather and the seasons, among other things, affect GRE’s and GRE International's REPs 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 effect. 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 50 45 2018 2017 30 2018 2017 Reclassifications Certain amounts from the prior year's financial statements have been reclassified in order to conform to the current year's presentation.

Cash, Cash Equivalents, and Res

Cash, Cash Equivalents, and Restricted Cash	3 Months Ended
	Mar. 31, 2019
Cash, Cash Equivalents, and Restricted Cash [Abstract]
Cash, Cash Equivalents, and Restricted Cash	Note 2—Cash, Cash Equivalents, and Restricted Cash The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported in the consolidated balance sheet that equals the total of the same amounts reported in the consolidated statement of cash flows: March 31, 2019 December 31, 2018 (in thousands) Cash and cash equivalents $ 37,540 $ 41,601 Restricted cash—short-term 6,058 1,653 Restricted cash—long-term 865 943 Total cash, cash equivalents, and restricted cash $ 44,463 $ 44,197 Restricted cash—short-term includes amounts set aside in accordance with the Amended and Restated Preferred Supplier Agreement with BP Energy Company (“BP”) (see Note 17

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventories [Abstract]
Inventories	Note 3—I nventories Inventories consisted of the following: March 31, 2019 December 31, 2018 (in thousands) Natural gas $ 203 $ 1,116 Renewable credits 8,863 8,654 Solar Panels: Finished goods 564 40 Raw materials 55 83 Total solar panels inventory 619 123 Totals $ 9,685 $ 9,893

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2019
Revenue Recognition [Abstract]
Revenue Recognition	Note 4—Revenue Recognition In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2014 09 Revenue from Contracts with Customers (Topic 606 , and has since issued amendments thereto (collectively referred to as “ASC 606 five 606 The Company adopted ASC 606 606 605 Practical Expedients The Company’s performance obligations are generally pursuant to contracts for which the estimated customer relationship periods are currently less than one 606 one Disaggregated Revenues The following table shows the Company’s revenues disaggregated by pricing plans offered to customers: (in thousands) Electricity Natural Gas Other Total Three Months Ended March 31, 2019 Fixed rate $ 23,317 $ 1,062 $ — $ 24,379 Variable rate 39,297 17,644 — 56,941 Other — — 5,297 5,297 Total $ 62,614 $ 18,706 $ 5,297 $ 86,617 Three Months Ended March 31, 2018 Fixed rate $ 21,333 $ 1,800 $ — $ 23,133 Variable rate 44,002 21,628 — 65,630 Other — — 505 505 Total $ 65,335 $ 23,428 $ 505 $ 89,268 The following table shows the Company’s revenues disaggregated by non-commercial and commercial channels: (in thousands) Electricity Natural Gas Other Total Three Months Ended March 31, 2019 Non-Commercial Channel $ 60,341 $ 16,527 $ — $ 76,868 Commercial Channel 2,273 2,179 — 4,452 Other — — 5,297 5,297 Total $ 62,614 $ 18,706 $ 5,297 $ 86,617 Three Months Ended March 31, 2018 Non-Commercial Channel $ 62,844 $ 21,381 $ — $ 84,225 Commercial Channel 2,491 2,047 — 4,538 Other — — 505 505 Total $ 65,335 $ 23,428 $ 505 $ 89,268

Acquisitions and Divestiture

Acquisitions and Divestiture	3 Months Ended
	Mar. 31, 2019
Acquisitions and Divestiture [Abstract]
Acquisitions and Divestiture	Note 5—Acquisitions and Divestiture Acquisition of Lumo Energia, Oyj On January 2, 2019 (“Closing Date”), pursuant to a Stock Purchase Agreement date December 17, 2018, the Company completed the purchase of an 80 1.6 1.9 1.3 1.5 2.0 2.3 4 4.0 176,104 three three Of the remaining 20.0 12.5 three The Company has a conditional continuing call option to purchase a portion or the entire noncontrolling interest from the sellers during the period beginning at the third anniversary of the Closing Date and ending three The sellers, as a group, have a one one two The Company recorded revenue for Lumo of approximately $ 4.8 three months ended March 31, 2019 The impact of the acquisition’s preliminary purchase price allocations on the Company’s consolidated balance sheet and the acquisition date fair value of the total consideration transferred were as follows: (in thousands) Cash $ 1,539 Trade accounts receivable 2,520 Other current assets 411 Intangible assets: Trademark ( 5 294 Non-compete agreements ( 3 34 Customer relationship ( 2 2,150 Goodwill 2,090 Other assets 95 Accounts and other current liabilities ( 2,403 ) Short-term debts ( 2,260 ) Other liabilities ( 195 ) Noncontrolling interest ( 884 ) Net assets $ 3,391 (in thousands) Supplemental information Cash paid to Sellers $ 1,869 Cash contributed to Lumo 1,522 Total consideration $ 3,391 The short-term debt, which was repaid in January 2019, pertained to loans incurred by Lumo from a financial institution and its equityholders in an aggregate amount of $ 2.3 3.75 Goodwill was allocated to the GRE International segment. Goodwill is the excess of the consideration transferred over the net assets recognized and represents the expected revenue and cost synergies of the combined company and assembled workforce. Goodwill recognized as a result of the acquisition is not deductible for income tax purposes. The preliminary allocations of the purchase prices for acquisitions are based upon initial valuations. The Company's estimates and assumptions underlying the initial valuations are subject to the collection of information necessary to complete its valuations within the measurement periods, which are up to one Acquisition of Prism Prism is a solar solutions company that is engaged in US based panel manufacturing, installation design and project management. Prism’s solar panels feature high efficiency N-type silicon solar cells designed into bifacial solar modules which result in systems with a reduction in the average cost per kilowatt hour, while their glass-on-glass design increases the durability and lifetime value of Prism’s panels. Between August and October 2018, the Company extended an aggregate of $ 1.3 12 On October 25, 2018, the Company acquired a 60.0 4.0 1.4 1.1 1.5 60 The Company recorded revenue for Prism of approximately $ 3.3 three The impact of the acquisition’s preliminary purchase price allocations on the Company’s consolidated balance sheet and the acquisition date fair value of the total consideration transferred were as follows: (in thousands) Cash $ 931 Trade accounts receivable 11 Inventories 1,142 Other current assets 260 Property plant and equipment ( 19 3,564 Intangible assets: Trademark ( 10 320 Patent ( 10 370 Customer contract ( 3 1,600 Goodwill 804 Accounts payable accrued expenses ( 1,723 ) Notes payable — ( 63 ) Notes payable — net of current portion ( 885 ) Other current liabilities ( 1,164 ) Noncontrolling interest ( 2,667 ) Net assets $ 2,500 (in thousands) Supplemental information Cash contributed to Prism $ 899 Notes receivable from Prism, including accrued interest, converted to Prism's equity 1,351 Cash payment to previous equity holders of Prism 250 2,500 Notes payable issued to Prism 1,500 Total considerations $ 4,000 Goodwill was allocated to the GES segment. Goodwill is the excess of the consideration transferred over the net assets recognized and represents the expected revenue and cost synergies of the combined company and assembled workforce. Goodwill recognized as a result of the acquisition is not deductible for income tax purposes. During the first quarter of 2019 minimal 0.1 0.2 0.3 Prism's notes payable consisted of the following: March 31, 2019 December 31, 2018 October 25, 2018 (in thousands) 5.95 7,184 $ 888 $ 893 $ 918 20.00 30 30 30 Total notes payable 918 923 948 Less: Current maturities 918 923 63 Noncurrent portion $ — $ — $ 885 On April 12, 2019, Prism’s restructured its ownership. The Company now holds a 60 100 Divestiture of Majority Interest in Atid Drilling Ltd. Following the Company’s decision to suspend its oil and gas exploration drilling activities, in June 2018, the Company initiated a plan to sell primarily all of Atid Drilling Ltd.'s ("Atid") assets and liabilities. In 2018 2.7 Genie Israel Holdings Ltd., a wholly-owned subsidiary of GOGAS (“Genie Israel”) contributed to Atid 613, the equity of Atid with net book value of $ 1.0 37.5 613 37.5 25.0 613 Genie Israel also entered into a Shareholder Agreement with Atid 613 Genie Israel has agreed to make available to Atid 613 a working capital financing up to $ 0.4 s of March 31, 2019 0.2 Genie Israel accounts for its investments Atid 613 Pro Forma Results (unaudited) The following unaudited pro forma financial information summarizes the results of operations for the three months ended March 31, 2018 as if the acquisitions of Lumo and Prism and divestiture of majority interest in Atid 613 2018 Three Months Ended March 31, 2018 (in thousands, except earnings per share) Total revenues $ 93,112 Net income 3,162 Net income attributable to Genie Energy Ltd. common stockholders 3,562 Earnings per share attributable to Genie energy Ltd. common stockholders Basic 0.15 Diluted 0.15

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 6—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) March 31, 2019 Assets: Derivative contracts $ 370 $ 111 $ — $ 481 Liabilities: Derivative contracts $ 892 $ 219 $ — $ 1,111 December 31, 2018 Assets: Derivative contracts $ 1,107 $ 467 $ — $ 1,574 Liabilities: Derivative contracts $ 2,100 $ 248 $ — $ 2,348 ( 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 did not have any transfers of assets or liabilities between Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three months ended March 31, 2019 and 2018. 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 and long-term, trade receivables, due to IDT Corporation, and other current liabilities. At March 31, 2019 December 31, 2018 1 2 Other assets, revolving line of credit, notes payable and other liabilities. At March 31, 2019 December 31, 2018 0.5 3 The Company did not have any transfers of assets or liabilities between Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three months ended March 31, 2019 and 2018. Concentration of Credit Risks Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents, restricted cash, derivatives and accounts receivable. The Company believes it had no significant concentrations of credit risk as of March 31, 2019.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments [Abstract]
Derivative Instruments	Note 7—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 The summarized volume of GRE’s outstanding contracts and options at March 31, 2019 Settlement Dates Volume Electricity (in MWH) Gas (in Dth) Second quarter 2019 28,864 80,125 Third quarter 2019 44,608 86,300 Fourth quarter 2019 35,344 1,163,050 First quarter 2020 186,560 1,101,477 Second quarter 2020 5,120 67,550 Third quarter 2020 22,800 34,850 Fourth quarter 2020 5,120 38,800 First quarter 2021 — 40,300 Second quarter 2021 — 29,650 Third quarter 2021 — 21,500 Fourth quarter 2021 — 15,750 First quarter 2022 — 9,750 The fair value of outstanding derivative instruments recorded in the accompanying consolidated balance sheets were as follows: Asset Derivatives Balance Sheet Location March 31, 2019 December 31, 2018 (in thousands) Derivatives not designated or not qualifying as hedging instruments: Energy contracts and options 1 Other current assets $ 282 $ 1,116 Energy contracts and options Other assets 199 458 Total derivatives not designated or not qualifying as a hedging instruments — $ 481 $ 1,574 Liability Derivatives Derivatives not designated or not qualifying as hedging instruments: Energy contracts and options 1 Other current liabilities $ 856 2,028 Energy contracts and options Other liabilities 255 320 Total derivatives not designated or not qualifying as a hedging instruments — Liabilities $ 1,111 $ 2,348 ( 1 The Company classifies derivative assets and liabilities as current based on the cash flows expected to be incurred within the following 12 . The effects of derivative instruments on the consolidated statements of operations was as follows: Amount of Gain (Loss) Recognized on Derivatives Derivatives not designated or not qualifying as Location of Gain (Loss) Recognized Three Months Ended March 31, hedging instruments on Derivatives 2019 2018 (in thousands) Energy contracts and options Cost of revenues $ ( 2,909 ) $ ( 83 )

Investment in Equity Method Inv

Investment in Equity Method Investees	3 Months Ended
	Mar. 31, 2019
Investment in Equity Method Investees [Abstract]
Investment in Equity Method Investees	Note 8—Investment in Equity Method Investees Investment in Shoreditch On July 17, 2017, the Company’s subsidiary, Genie Energy UK Ltd. (“GEUK”), entered into a definitive agreement with Energy Global Investments Pty Ltd (“EGC”) to launch Shoreditch Energy Limited (“Shoreditch”), a joint venture to offer electricity and natural gas service to residential and small business customers in the United Kingdom, using the trade name Orbit Energy (the “JV Agreement”). Through March 31, 2019, the Company contributed a total of $ 5.3 67 EGC has several significant participation rights in the management of Shoreditch that limits GEUK’s ability to direct the activities that most significantly impact Shoreditch’s economic performance. GEUK, therefore, accounts for its ownership interest in Shoreditch using the equity method since GEUK has the ability to exercise significant influence over its operating and financial matters, although it does not control Shoreditch. In 2018 0.2 2 September 17, 2023 March 31, 2019 0.2 At March 31, 2019 0.6 Summarized unaudited statements of operations of Shoreditch are as follows: Three March 31, 2019 2018 (in thousands) Revenues $ 3,911 $ 114 Operating expenses: Cost of revenues 3,700 133 Selling, general and administrative 1,807 760 Loss from operations ( 1,596 ) ( 779 ) Other — — Net loss $ ( 1,596 ) $ ( 779 ) Genie’s equity in net loss $ ( 1,070 ) $ ( 506 ) Investment in Atid 613 As discussed in Note 5 , Acquisitions and Divestitures, 37.5 613 Summarized unaudited statements of operations of 613 three months ended March 31, 2019 Revenues $ 2,055 Operating expenses: Cost of revenues 1,340 Selling, general and administrative — Loss from operations 715 Other ( 8 ) Net income $ 707 Genie’s equity in net income $ 274 At March 31, 2019 , the Company’s maximum exposure to loss as a result of its involvement with Atid 613 0.8 million and notes receivable of $ 0.1 illion, excluding the undrawn balance of the Credit Facility, since there were no other arrangements, events or circumstances that could expose the Company to additional loss.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2019
Goodwill and Other Intangible Assets [Abstract]
Goodwill and Other Intangible Assets	Note 9—Goodwill and Other Intangible Assets The table below reconciles the change in the carrying amount of goodwill for the period from January 1, 2018 to March 31, 2018 (in thousands) GRE GRE International GES Total Balance at January 1, 2019 $ 9,998 $ — $ 1,084 $ 11,082 Prisim acquisition purchase price allocation adjustment (see Note 5 — — ( 280 ) ( 280 ) Acquisition of Lumo (see Note 5 — 2,090 — 2,090 Translation adjustment — 131 — 131 Balance at March 31, 2019 $ 9,998 $ 2,221 $ 804 $ 13,023 The table below presents information on the Company’s other intangible assets: (in thousands) Weighted Average Amortization Period Gross Carrying Amount Accumulated Amortization Net Balance March 31, 2019 Patents and trademarks 17.1 $ 3,838 $ 357 $ 3,481 Non-compete agreements 1.6 148 117 31 Customer relationships 3.9 6,945 2,783 4,162 Licenses 10.0 895 60 835 TOTAL $ 11,826 $ 3,317 $ 8,509 December 31, 2018 Trademark 17.3 $ 3,470 $ 288 $ 3,182 Non-compete agreement 2.0 115 112 3 Customer relationships 4.0 4,612 2,334 2,278 Licenses 10.0 895 37 858 TOTAL $ 9,092 $ 2,771 $ 6,321 Amortization expense of intangible assets (including minimal amount reported in cost of revenues) was $ 0.7 0.3 three months ended March 31, 2019 2018 1.5 2.1 1.0 0.5 0.5 2.9 2019 2020 2021 2022 2023 2024

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Note 10 The Company entered into operating lease agreements primarily for offices throughout the world with lease periods expiring between 2019 and 2030 The Company determine if a contract is a lease at inception. Operating lease assets and liabilities are included on our consolidated balance sheet beginning January 1, 2019. Righ-of-Use- ("ROU") assets were included under other assets in the consolidated balance sheet. The current portion of the operating lease liabilities were included in other current liabilities and the noncurrent portion is included in other liabilities in the consolidated balance sheet. ROU assets and operating lease liabilities are recognized at the present value of the future lease payments at the lease commencement date. The interest rate used to determine the present value of the future lease payments is the incremental borrowing rate, because the interest rate implicit in most of our leases is not readily determinable. The incremental borrowing rate is estimated to approximate the interest rate on a collateralized borrowing rate based on information available at the lease commencement date. ROU assets also include any prepaid lease payments and lease incentives. The lease terms include periods under options to extend or terminate the lease when it is reasonably certain that we will exercise that option. The Company use the base, non-cancelable, lease term when determining the lease assets and liabilities. Operating lease expense is recognized on a straight-line basis over the lease term. (in thousands) March 31, 2019 ROU Assets $ 2,293 Current portion of operating lease liabilities 370 Noncurrent portion of operating lease liabilities 1,941 Total $ 2,311 At March 31, 2019 the weighted average remaining lease term is 8.9 7.2 Supplemental cash flow information to leases was a follows for the three months ended March 31, 2019: (in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating activities $ 136 ROU assets obtained in the exchange for lease liabilities Operating leases $ 80 Future lease payments under operating leases as of March 31, 2019 were as follows: (in thousands) Remainder of 2019 $ 406 2020 426 2021 376 2022 217 2023 221 Thereafter 1,530 Total future lease payments 3,176 Less imputed interest 865 Total operating lease liabilities $ 2,311 Rental expense under operating leases was $ 0.2 0.1 three 2018

Equity

Equity	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Equity	Note 11—Equity Dividend Payments The following table summarizes the quarterly dividends paid by the Company during the three March 31, 2019 Declaration Date Dividend Per Share Aggregate Dividend Amount Record Date Payment Date Series 2012 January 16, 2018 $ 0.1594 $ 370 February 6, 2018 February 15, 2018 Class A Common Stock and Class B Common Stock March 7, 2018 $ 0.0750 $ 2,006 March 19, 2018 March 23, 2018 On April 10, 2019, the Company’s Board of Directors declared a quarterly Base Dividend of $ 0.1594 first 2019 May 15, 2019 May 6, 2019 On May 2, 2019, the Company’s Board of Directors declared a quarterly dividend of $ 0.075 first 2019 The Delaware General Corporation Law, allows companies to declare dividends out of “Surplus,” which is calculated by deducting the par value of the company’s stock from the difference between total assets less total liabilities. The Company elected to record dividends declared against accumulated deficit. Stock Repurchase Program On March 11, 2013, the Board of Directors of the Company approved a program for the repurchase of up to an aggregate of 7.0 B common stock. There were no repurchases under this program in the three March 31, 2019 2018 March 31, 2019 6.9 Sales of Shares and Warrants On June 8, 2018, the Company sold to Howard S. Jonas, the Chairman of the Company’s Board of Directors and a principal owner, ( 1 1,152,074 4.34 5.0 2 1,048,218 4.77 5.0 1 230,415 4.34 1.0 2 209,644 4.77 1.0 March 31, 2019 , there were outstanding 1,257,862 4.77 Purchase of Equity of Subsidiary In June 2018, an entity affiliated with Lord (Jacob) Rothschild exercised its option to exchange its 5 41,667 0.22 92 97 Issuance of Class B Common Stock In January 2, 2019, as part of the acquisition of Lumo, t he Company issued 176,104 5 — Acquisition and Divestitures Stock-Based Compensation On May 7, 2018, the Company’s stockholders approved an amendment to the Company’s 2011 974,199 On February 11, 2019, the Company issued options to Howard S. Jonas to purchase 126,176 8.05 0.3 three As of March 31, 2019 , there was approximately $ 2.6 million of total unrecognized compensation costs related to the unvested restricted stock awards. These costs are expected to be recognized over a weighted-average period of approximately 2.3 years. GRES and GREI Equity Grants In August 2017, Genie Retail Energy International, LLC ("GREI"), a subsidiary of GRE, which holds the Company's interests in ventures in the U. K., Japan and Finland, granted deferred stock units in GREI representing an aggregate of 4.0 March 31, 2019 2018 March 31, 2019 0.1 1.7 In August 2017, Genie Retail Energy Services, LLC ("GRES"), a subsidiary of GRE, granted deferred stock units in GES representing an aggregate of 4.5 three months ended March 31, 2019 2018 March 31, 2019 1.6

Variable Interest Entity

Variable Interest Entity	3 Months Ended
	Mar. 31, 2019
Variable Interest Entity [Abstract]
Variable Interest Entity	Note 12—Variable Interest Entity Citizens Choice Energy, LLC (“CCE”), is a REP that resells electricity and natural gas to residential and small business customers in the State of New York. The Company does not own any interest in CCE. Since 2011 The Company has an option to purchase 100 one 0.5 October 22, 2023 Net loss related to CCE and aggregate net funding repaid to (provided by) the Company were as follows: Three March 31, 2019 2018 (in thousands) Net income (loss) $ 149 $ ( 268 ) Aggregate funding repaid to (provided by) the Company, net $ 176 $ ( 95 ) Summarized combined balance sheet amounts related to CCE was as follows: March 31, 2019 December 31, 2018 (in thousands) Assets Cash and cash equivalents $ 29 $ 70 Trade accounts receivable 667 623 Prepaid expenses and other current assets 356 411 Other assets 359 359 Total assets $ 1,411 $ 1,463 Liabilities and noncontrolling interests Current liabilities $ 489 $ 513 Due to IDT Energy 1,773 1,949 Noncontrolling interests ( 851 ) ( 999 ) Total liabilities and noncontrolling interests $ 1,411 $ 1,463 The assets of CCE may only be used to settle obligations of CCE, and may not be used for other consolidated entities. The liabilities of CCE are non-recourse to the general credit of the Company’s other consolidated entities.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Taxes [Abstract]
Income Taxes	Note 13—Income Taxes The consolidated effective tax rate for three months ended March 31, 2019 and 2018 32.0 12.0 The increase in effective tax rate results from the release of the valuation allowance on the deferred tax assets in fourth quarter of 2018

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Note 14—Earnings 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 weighted-average number of shares used in the calculation of basic and diluted earnings per share attributable to the Company’s common stockholders consists of the following: Three March 31, 2019 2018 (in thousands) Basic weighted-average number of shares 26,532 24,239 Effect of dilutive securities: Stock options and warrants 540 — Non-vested restricted Class B common stock 168 56 Diluted weighted-average number of shares 27,240 24,295 The following shares were excluded from the diluted earnings per share computation: Three March 31, 2019 2018 (in thousands) Stock options and warrants — 381 In the three March 31, 2018

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Note 15—Related Party Transactions On June 8, 2018, the Company sold shares of its Class B common stock and warrants to purchase shares of its Class B common stock to Howard S. Jonas (see Note 11 The Company was formerly a subsidiary of IDT Corporation (“IDT”). On October 28, 2011, the Company was spun-off by IDT. The Company entered into various agreements with IDT prior to the spin-off including an agreement for certain services to be performed by the Company and IDT. Also, the Company provides specified administrative services to certain of IDT’s foreign subsidiaries. On March 26, 2018, IDT completed a pro rata distribution of the common stock that IDT held in IDT’s subsidiary, Rafael Holdings, Inc. (“Rafael”) to IDT’s stockholders. Howard S. Jonas is the Chairman of the Board of Directors and the Chief Executive Officer of Rafael. The Company leases office space and parking in Rafael’s building and parking garage located at 520 The charges for services provided by IDT to the Company, and rent charged by Rafael, net of the charges for the services provided by the Company to IDT, are included in “Selling, general and administrative” expense in the consolidated statements of operations. Three Months Ended March 31, 2019 2018 (in thousands) Amount IDT charged the Company $ 182 $ 316 Amount the Company charged IDT $ 37 $ 121 Amount Rafael charged the Company $ 54 $ — The following table presents the balance of receivables and payables to IDT and Rafael: March 31, 2019 December 31, 2018 (in thousands) Due to IDT $ 174 $ 267 Due from IDT 37 33 Due to Rafael — — The Company had minimal transactions with Zedge, Inc. (“Zedge”) related to certain employees of the Company providing services to Zedge. Zedge was a subsidiary of IDT and was spun-off in June 2016 and Howard Jonas is a current director. There is minimal amount due from Zedge at March 31, 2019 December 31, 2018 From 2012 2015 0.5 0.5 0.1 0.4 0.1 December 2020 and December 2052. three March 31, 2019 2018 0.1 March 31, 2019 The Company obtains insurance policies from several insurance brokers, one 0.3 no March 31, 2019

Business Segment Information

Business Segment Information	3 Months Ended
	Mar. 31, 2019
Business Segment Information [Abstract]
Business Segment Information	Note 16—Business Segment Information In the first quarter of 2019 e U.K. Specifically, the Company now treats GRE International as a separate reportable segment which includes overseas retail energy supply businesses, currently consisting of interests in Lumo, Genie Japan and the Company's share of operations of Shoreditch. There are no other changes in other reportable segments. The change in reportable segments did not resulted in the reallocation of the Company's existing goodwill. Segment information from the prior year's financial statements have been reclassified in order to conform to the current year's presentation. The Company has four Its REP businesses resell electricity and natural gas to residential and small business customers in the Eastern and Midwestern United States. GRE International, operates REPs in Japan and Finland and manages the Company's share in operations of Shoreditch in the U.K. 86.1 613 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. Opera ting r (in thousands) GRE GRE International GES GOGAS Corporate Total Three Months Ended March 31, 2019 Revenues $ 76,517 4,843 $ 5,257 $ — $ — $ 86,617 Income (loss) from operations 13,503 ( 1,744 ( 231 ( 163 ( 1,531 9,834 Equity in the net income (loss) of equity method investees — ( 1,070 — 273 — ( 797 Three Months Ended March 31, 2018 Revenues $ 88,766 — $ 502 $ — $ — $ 89,268 Income (loss) from operations 11,016 ( 69 ( 92 ( 1,361 ( 2,361 7,133 Exploration — — — 227 — 227 Equity in net loss of Shoreditch — 506 — — — 506 Total assets for the business segments of the Company wer e as (in thousands) GRE GRE International GES GOGAS Corporate Total Total assets: March 31, 2019 $ 112,401 $ 11,760 $ 9,801 $ 13,346 $ 6,928 $ 154,236 December 31, 2018 $ 113,918 $ 3,654 $ 11,519 $ 15,375 $ 2,398 $ 146,864

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 17 Legal Proceedings On October 5, 2018, named plaintiffs Scott Mackey and Daniel Hernandez filed a putative class action complaint against IDT Energy in the United States District Court for the Northern District of Illinois alleging violations of the Telephone Consumer Protection Act, 47 227 1 one four 2 one 12 four On November 30, 2018, IDT Energy filed its Answer and Defenses to the complaint and the parties are now engaged in discovery. IDT Energy denies the allegations in the complaint, which it believes to be completely, meritless and plans to vigorously defend this action. Based upon the Company’s preliminary assessment of this matter, a loss based on the merits is not considered probable, nor is the amount of loss, if any, estimable March 31, 2019 On March 13, 2014, July 2, 2014 and July 15, 2014, named plaintiffs in Pennsylvania, New York and New Jersey commenced three three Under the Settlement Agreement, the Company agreed to pay certain amounts to resolve the lawsuits and obtain a release of claims that were, or could have been, asserted in the lawsuits or that are related to, or arise out of the conduct alleged in the lawsuits or similar conduct, wherever it may have occurred. The settlement payment includes payments to customers who timely made a claim, class counsel, and the named plaintiffs, as well as the cost of a claims administrator for administrating the claims process. The period for class members to make claims has expired, and in first quarter of 2018 7.6 At March 31, 2019 $ 0.4 In addition to the matters disclosed 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. Agency and Regulatory Proceedings From time to time, the Company responds to inquiries or requests for information or materials from public utility commissions or other governmental regulatory or law enforcement agencies related to investigations under statutory or regulatory schemes. The Company cannot predict whether any of those matters will lead to claims or enforcement actions or whether the Company and the regulatory parties will enter into settlements before a formal claim is made. New Jersey Attorney General and New Jersey Board of Public Utilities On May 22, 2018, IDT Energy entered into a Consent Order with the New Jersey Attorney General and the New Jersey Board of Public Utilities to resolve an investigation related to IDT Energy’s pricing and business practices during the winter of 2014 Under the terms of the Consent Order, IDT Energy agreed to make payments totaling $ 1.4 1.2 2014 IDT Energy will also implement certain modifications to its sales, marketing and customer service processes, along with additional compliance and reporting requirements. In the third quarter of 2017 1.5 IDT Energy has made full payment of the amount agreed upon in the Consent Order to a settlement administrator, who will process the restitution payments. New York Public Service Commission Proceedings In December 2017, the New York Public Service Commission (“PSC”) held an evidentiary hearing to assess the retail energy market in New York. The parties recently completed post-hearing briefing in the proceedings. The Company is evaluating the potential impact of any new order from the PSC that may follow from the evidentiary process, while preparing various contingencies for operation in compliance with any new requirements that may be imposed. Depending on the final language of any new order, as well as the Company’s ability to modify its relationships with its New York customers, an order could have a substantial impact upon the operations of GRE’s REPs in New York. As of March 31, 2019 28.5 20.8% three March 31, 2019 21.5 An RCE represents a natural gas customer with annual consumption of 100 10 On December 16, 2016, the PSC issued an order (the “ 2016 2016 2016 2016 18,700 10,600 On March 27, 2018, the New York Court of Appeals granted Motions for Leave to Appeal the question of whether the New York Legislature ever imparted to the PSC the authority to regulate the rates that private, non-monopoly REPs charge their customers. On March 19, 2019, the Court of Appeals heard oral arguments regarding the decision entered by the Appellate Division, Third Department, concerning the issue of the scope of the PSC’s authority over REPs under the Public Service Law, and to pronounce New York law on that issue. On May 9, 2019, the Court of Appeals ruled that although PSC has no authority over private non-monopoly REPs, their authority to regulate and control access to public utility infrastructure allows them to impose price caps on the prices that non-monopoly REPs charge customers for natural gas and electricity. Ohio Public Utilities Commission In August and November of 2017 entered into a settlement agreement which was approved by the PUCO on February 27, 2019. Under the terms of the agreement, Town Square will pay a forfeiture of $ 0.2 In addition, Town Square will work with the PUCO and take steps to ensure full compliance with PUCO rules and orders, including updating customers, providing the PUCO with updated information, and submitting quarterly reports for a one $ 0.2 2018 March 31, 2019 0.3 0.3% three March 31, 2019 3.4 State of Connecticut Public Utilities Regulatory Authority On September 19, 2018, the State of Connecticut Public Utilities Regulatory Authority (“PURA”) commenced an investigation into Town Square following customer complaints of allegedly misleading and deceptive sales practices on the part of Town Square. The Office of Consumer Counsel has joined in the investigation. March 31, 2019 10.9 12.4% three March 31, 2019 6.4 As of March 31, 2019 no claims or demands have been made against Town Square by either agency, and there is insufficient basis to deem the loss probable or to the assess the amount of any possible loss. State of Illinois Office of the Attorney General In response to complaints that IDT Energy enrolled consumers without their express consent and misrepresented the amount of savings those consumers would receive, the Office of the Attorney General of the State of Illinois (“IL AG”) has been investigating the marketing practices of IDT Energy and has alleged violations of the Consumer Fraud and Deceptive Business Practices Act, 815 505 1 et seq 815 413 1 et seg. 3.0 on November 19, 2018, the IL AG filed a Complaint for Injunctive and Other Relief (“Complaint”) against IDT Energy in the Chancery Division of the Circuit Court of Cook County. In third quarter of 2018 3.0 March 31, 2019 16.1 15.6% three March 31, 2019 0.2 Other Commitments Purchase Commitments The Company had future purchase commitments of $ 108.9 March 31, 2019 91.2 March 31, 2019 (in thousands) Remainder of 2019 $ 60,488 2020 45,131 2021 2,708 2022 548 Thereafter — Total payments $ 108,875 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, 2019 17.7 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, 2019 13.0 BP Energy Company Preferred Supplier Agreement As of November 19, 2015, certain of GRE’s REPs entered into an Amended and Restated Preferred Supplier Agreement with BP, which was amended as of June 7, 2018. The agreement’s termination date is November 30, 2021 2.0 March 31, 2019 March 31, 2019 0.9 41.4 13.6 March 31, 2019

Lines of Credit

Lines of Credit	3 Months Ended
	Mar. 31, 2019
Lines of Credit [Abstract]
Lines of Credit	Note 18 On April 4, 2017, GRE, IDT Energy, and other GRE subsidiaries entered into a Credit Agreement with Vantage Commodities Financial Services II, LLC for a $ 20 outstanding principal amount incurs interest at LIBOR 4.5 April 3, 2020 March 31, 2019 December 31, 2018 2.5 March 31, 2019 December 31, 2018 7.13 7.24 On December 18, 2018, the Company entered into a Credit Agreement with JPMorgan Chase Bank (“Credit Agreement”) for a $ 5.0 December 31, 2019 0.10% 1.0 500 1.00 $ 5.1 5.2

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2019
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	Note 19 In February 2016, the FASB issued ASU No. 2016 02 Leases (Topic 842 12 2016 02 2018 10 842 2018 10 2018 11 842 2018 11 2018 10 2016 02 sixteen 2018 11 840 840 840 840 2018 11 two 2016 02 The Company adopted Topic 842 2.4 0.4 2.0 In June 2016, the FASB issued ASU No. 2016 13 Measurement of Credit Losses on Financial Instruments , that changes the impairment model for most financial assets and certain other instruments. For receivables, loans and other instruments, entities will be required to use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowance for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to current practice, except the losses will be recognized as allowances instead of reductions in the amortized cost of the securities. In addition, an entity will have to disclose significantly more information about allowances, credit quality indicators and past due securities. The new provisions will be applied as a cumulative-effect adjustment to retained earnings. The Company will adopt the new standard on January 1, 2020. The Company is evaluating the impact that the new standard will have on its consolidated financial statements. In June 2018, the FASB issued ASU No. 2018 07 718 718 718 718 1 2 606 0.3

Cash, Cash Equivalents, and R_2

Cash, Cash Equivalents, and Restricted Cash (Tables)	3 Months Ended
	Mar. 31, 2019
Cash, Cash Equivalents, and Restricted Cash [Abstract]
Schedule of reconciliation of cash, cash equivalents, and restricted cash	March 31, 2019 December 31, 2018 (in thousands) Cash and cash equivalents $ 37,540 $ 41,601 Restricted cash—short-term 6,058 1,653 Restricted cash—long-term 865 943 Total cash, cash equivalents, and restricted cash $ 44,463 $ 44,197

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventories [Abstract]
Schedule of Inventories	March 31, 2019 December 31, 2018 (in thousands) Natural gas $ 203 $ 1,116 Renewable credits 8,863 8,654 Solar Panels: Finished goods 564 40 Raw materials 55 83 Total solar panels inventory 619 123 Totals $ 9,685 $ 9,893

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue Recognition [Abstract]
Schedule of revenues disaggregated	(in thousands) Electricity Natural Gas Other Total Three Months Ended March 31, 2019 Fixed rate $ 23,317 $ 1,062 $ — $ 24,379 Variable rate 39,297 17,644 — 56,941 Other — — 5,297 5,297 Total $ 62,614 $ 18,706 $ 5,297 $ 86,617 Three Months Ended March 31, 2018 Fixed rate $ 21,333 $ 1,800 $ — $ 23,133 Variable rate 44,002 21,628 — 65,630 Other — — 505 505 Total $ 65,335 $ 23,428 $ 505 $ 89,268 (in thousands) Electricity Natural Gas Other Total Three Months Ended March 31, 2019 Non-Commercial Channel $ 60,341 $ 16,527 $ — $ 76,868 Commercial Channel 2,273 2,179 — 4,452 Other — — 5,297 5,297 Total $ 62,614 $ 18,706 $ 5,297 $ 86,617 Three Months Ended March 31, 2018 Non-Commercial Channel $ 62,844 $ 21,381 $ — $ 84,225 Commercial Channel 2,491 2,047 — 4,538 Other — — 505 505 Total $ 65,335 $ 23,428 $ 505 $ 89,268

Acquisitions and Divestiture (T

Acquisitions and Divestiture (Tables)	3 Months Ended
	Mar. 31, 2019
Lumo Energia Oyj [Member]
Business Acquisition [Line Items]
Schedule of acquisition's purchase price allocations	(in thousands) Cash $ 1,539 Trade accounts receivable 2,520 Other current assets 411 Intangible assets: Trademark ( 5 294 Non-compete agreements ( 3 34 Customer relationship ( 2 2,150 Goodwill 2,090 Other assets 95 Accounts and other current liabilities ( 2,403 ) Short-term debts ( 2,260 ) Other liabilities ( 195 ) Noncontrolling interest ( 884 ) Net assets $ 3,391 (in thousands) Supplemental information Cash paid to Sellers $ 1,869 Cash contributed to Lumo 1,522 Total consideration $ 3,391
Prism Solar Technologies, Inc. [Member]
Business Acquisition [Line Items]
Schedule of acquisition's purchase price allocations	(in thousands) Cash $ 931 Trade accounts receivable 11 Inventories 1,142 Other current assets 260 Property plant and equipment ( 19 3,564 Intangible assets: Trademark ( 10 320 Patent ( 10 370 Customer contract ( 3 1,600 Goodwill 804 Accounts payable accrued expenses ( 1,723 ) Notes payable — ( 63 ) Notes payable — net of current portion ( 885 ) Other current liabilities ( 1,164 ) Noncontrolling interest ( 2,667 ) Net assets $ 2,500 (in thousands) Supplemental information Cash contributed to Prism $ 899 Notes receivable from Prism, including accrued interest, converted to Prism's equity 1,351 Cash payment to previous equity holders of Prism 250 2,500 Notes payable issued to Prism 1,500 Total considerations $ 4,000
Schedule of Business Acquisitions Notes Payable	March 31, 2019 December 31, 2018 October 25, 2018 (in thousands) 5.95 7,184 $ 888 $ 893 $ 918 20.00 30 30 30 Total notes payable 918 923 948 Less: Current maturities 918 923 63 Noncurrent portion $ — $ — $ 885
Atid Drilling Ltd. [Member]
Business Acquisition [Line Items]
Schedule of pro forma information	Three Months Ended March 31, 2018 (in thousands, except earnings per share) Total revenues $ 93,112 Net income 3,162 Net income attributable to Genie Energy Ltd. common stockholders 3,562 Earnings per share attributable to Genie energy Ltd. common stockholders Basic 0.15 Diluted 0.15

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Measurements [Abstract]
Schedule of 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) March 31, 2019 Assets: Derivative contracts $ 370 $ 111 $ — $ 481 Liabilities: Derivative contracts $ 892 $ 219 $ — $ 1,111 December 31, 2018 Assets: Derivative contracts $ 1,107 $ 467 $ — $ 1,574 Liabilities: Derivative contracts $ 2,100 $ 248 $ — $ 2,348 ( 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

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments [Abstract]
Summary of volume of GRE's outstanding contracts and options	Settlement Dates Volume Electricity (in MWH) Gas (in Dth) Second quarter 2019 28,864 80,125 Third quarter 2019 44,608 86,300 Fourth quarter 2019 35,344 1,163,050 First quarter 2020 186,560 1,101,477 Second quarter 2020 5,120 67,550 Third quarter 2020 22,800 34,850 Fourth quarter 2020 5,120 38,800 First quarter 2021 — 40,300 Second quarter 2021 — 29,650 Third quarter 2021 — 21,500 Fourth quarter 2021 — 15,750 First quarter 2022 — 9,750
Schedule of fair value of outstanding derivative instruments recorded as assets and liability	Asset Derivatives Balance Sheet Location March 31, 2019 December 31, 2018 (in thousands) Derivatives not designated or not qualifying as hedging instruments: Energy contracts and options 1 Other current assets $ 282 $ 1,116 Energy contracts and options Other assets 199 458 Total derivatives not designated or not qualifying as a hedging instruments — $ 481 $ 1,574 Liability Derivatives Derivatives not designated or not qualifying as hedging instruments: Energy contracts and options 1 Other current liabilities $ 856 2,028 Energy contracts and options Other liabilities 255 320 Total derivatives not designated or not qualifying as a hedging instruments — Liabilities $ 1,111 $ 2,348
Schedule of derivative instruments on the consolidated statements of income	Amount of Gain (Loss) Recognized on Derivatives Derivatives not designated or not qualifying as Location of Gain (Loss) Recognized Three Months Ended March 31, hedging instruments on Derivatives 2019 2018 (in thousands) Energy contracts and options Cost of revenues $ ( 2,909 ) $ ( 83 )

Investment in Equity Method I_2

Investment in Equity Method Investees (Tables)	3 Months Ended
	Mar. 31, 2019
Shoreditch [Member]
Schedule of Equity Method Investments [Line Items]
Summary of unaudited statements of operations	Three March 31, 2019 2018 (in thousands) Revenues $ 3,911 $ 114 Operating expenses: Cost of revenues 3,700 133 Selling, general and administrative 1,807 760 Loss from operations ( 1,596 ) ( 779 ) Other — — Net loss $ ( 1,596 ) $ ( 779 ) Genie’s equity in net loss $ ( 1,070 ) $ ( 506 )
New Atid [Member]
Schedule of Equity Method Investments [Line Items]
Summary of unaudited statements of operations	Revenues $ 2,055 Operating expenses: Cost of revenues 1,340 Selling, general and administrative — Loss from operations 715 Other ( 8 ) Net income $ 707 Genie’s equity in net income $ 274

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Goodwill and Other Intangible Assets [Abstract]
Schedule of goodwill	(in thousands) GRE GRE International GES Total Balance at January 1, 2019 $ 9,998 $ — $ 1,084 $ 11,082 Prisim acquisition purchase price allocation adjustment (see Note 5 — — ( 280 ) ( 280 ) Acquisition of Lumo (see Note 5 — 2,090 — 2,090 Translation adjustment — 131 — 131 Balance at March 31, 2019 $ 9,998 $ 2,221 $ 804 $ 13,023
Schedule of other intangible assets	(in thousands) Weighted Average Amortization Period Gross Carrying Amount Accumulated Amortization Net Balance March 31, 2019 Patents and trademarks 17.1 $ 3,838 $ 357 $ 3,481 Non-compete agreements 1.6 148 117 31 Customer relationships 3.9 6,945 2,783 4,162 Licenses 10.0 895 60 835 TOTAL $ 11,826 $ 3,317 $ 8,509 December 31, 2018 Trademark 17.3 $ 3,470 $ 288 $ 3,182 Non-compete agreement 2.0 115 112 3 Customer relationships 4.0 4,612 2,334 2,278 Licenses 10.0 895 37 858 TOTAL $ 9,092 $ 2,771 $ 6,321

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Schedule of operating lease expense	(in thousands) March 31, 2019 ROU Assets $ 2,293 Current portion of operating lease liabilities 370 Noncurrent portion of operating lease liabilities 1,941 Total $ 2,311
Schedule of supplemental cash flow information	(in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating activities $ 136 ROU assets obtained in the exchange for lease liabilities Operating leases $ 80
Schedule of future operating lease	(in thousands) Remainder of 2019 $ 406 2020 426 2021 376 2022 217 2023 221 Thereafter 1,530 Total future lease payments 3,176 Less imputed interest 865 Total operating lease liabilities $ 2,311

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of dividend paid	Declaration Date Dividend Per Share Aggregate Dividend Amount Record Date Payment Date Series 2012 January 16, 2018 $ 0.1594 $ 370 February 6, 2018 February 15, 2018 Class A Common Stock and Class B Common Stock March 7, 2018 $ 0.0750 $ 2,006 March 19, 2018 March 23, 2018

Variable Interest Entity (Table

Variable Interest Entity (Tables)	3 Months Ended
	Mar. 31, 2019
Variable Interest Entity [Abstract]
Schedule of net income (loss) related to CCE and aggregate net funding	Three March 31, 2019 2018 (in thousands) Net income (loss) $ 149 $ ( 268 ) Aggregate funding repaid to (provided by) the Company, net $ 176 $ ( 95 )
Summary of combined balance sheet amounts related to CCE	March 31, 2019 December 31, 2018 (in thousands) Assets Cash and cash equivalents $ 29 $ 70 Trade accounts receivable 667 623 Prepaid expenses and other current assets 356 411 Other assets 359 359 Total assets $ 1,411 $ 1,463 Liabilities and noncontrolling interests Current liabilities $ 489 $ 513 Due to IDT Energy 1,773 1,949 Noncontrolling interests ( 851 ) ( 999 ) Total liabilities and noncontrolling interests $ 1,411 $ 1,463

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Summary of weighted-average number of shares used in the calculation of basic and diluted earnings per share	Three March 31, 2019 2018 (in thousands) Basic weighted-average number of shares 26,532 24,239 Effect of dilutive securities: Stock options and warrants 540 — Non-vested restricted Class B common stock 168 56 Diluted weighted-average number of shares 27,240 24,295
Summary of shares were excluded from the diluted earnings per share	Three March 31, 2019 2018 (in thousands) Stock options and warrants — 381

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
Schedule of related party transactions	Three Months Ended March 31, 2019 2018 (in thousands) Amount IDT charged the Company $ 182 $ 316 Amount the Company charged IDT $ 37 $ 121 Amount Rafael charged the Company $ 54 $ —
Schedule of receivables and payables	March 31, 2019 December 31, 2018 (in thousands) Due to IDT $ 174 $ 267 Due from IDT 37 33 Due to Rafael — —

Business Segment Information (T

Business Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Business Segment Information [Abstract]
Summary of operating results for the business segments	(in thousands) GRE GRE International GES GOGAS Corporate Total Three Months Ended March 31, 2019 Revenues $ 76,517 4,843 $ 5,257 $ — $ — $ 86,617 Income (loss) from operations 13,503 ( 1,744 ( 231 ( 163 ( 1,531 9,834 Equity in the net income (loss) of equity method investees — ( 1,070 — 273 — ( 797 Three Months Ended March 31, 2018 Revenues $ 88,766 — $ 502 $ — $ — $ 89,268 Income (loss) from operations 11,016 ( 69 ( 92 ( 1,361 ( 2,361 7,133 Exploration — — — 227 — 227 Equity in net loss of Shoreditch — 506 — — — 506
Summary of total assets for the business segments	(in thousands) GRE GRE International GES GOGAS Corporate Total Total assets: March 31, 2019 $ 112,401 $ 11,760 $ 9,801 $ 13,346 $ 6,928 $ 154,236 December 31, 2018 $ 113,918 $ 3,654 $ 11,519 $ 15,375 $ 2,398 $ 146,864

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies [Abstract]
Schedule of purchase commitments outstanding	(in thousands) Remainder of 2019 $ 60,488 2020 45,131 2021 2,708 2022 548 Thereafter — Total payments $ 108,875

Basis of Presentation (Details)

Basis of Presentation (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Sep. 30, 2017
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	86.10%
Genie Retail Energy [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	100.00%
Ownership interest of company	4.50%
Percentage of gas revenue generated in given period	50.00%	45.00%	30.00%	30.00%
Genie Oil and Gas, Inc. [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	97.00%
Genie Energy Services [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	100.00%
Prism Solar Technology [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	60.00%
Business Acquired interest	60.00%
Afek Oil and Gas, Ltd. [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	86.10%
Lumo Energia Oyj [Member]
Basis of Presentation (Textual)
Business Acquired interest	80.00%
Genie Energy International Corporation [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	99.30%
Ownership interest of company	4.00%
Atid Drilling Ltd. [Member]
Basis of Presentation (Textual)
Company's investment, ownership percentage in subsidiary	37.50%

Cash, Cash Equivalents, and R_3

Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Cash, Cash Equivalents, and Restricted Cash [Abstract]
Cash and cash equivalents	$ 37,540	$ 41,601
Restricted cash-short-term included in other current assets	6,058	1,653
Restricted cash-long-term	865	943
Total cash, cash equivalents, and restricted cash	$ 44,463	$ 44,197	$ 38,083	$ 31,927

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventories [Abstract]
Natural gas	$ 203	$ 1,116
Renewable credits	8,863	8,654
Solar Panels:
Finished goods	564	40
Raw materials	55	83
Total solar panels inventory	619	123
Totals	$ 9,685	$ 9,893

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Electricity	$ 62,614	$ 65,335
Natural Gas	18,706	23,428
Other	5,297	505
Total	86,617	89,268
Pricing plans offered to customers [Member]
Disaggregation of Revenue [Line Items]
Electricity	62,614	65,335
Natural Gas	18,706	23,428
Other	5,297	505
Total	86,617	89,268
Fixed rate [Member] | Pricing plans offered to customers [Member]
Disaggregation of Revenue [Line Items]
Electricity	23,317	21,333
Natural Gas	1,062	1,800
Other
Total	24,379	23,133
Variable rate [Member] | Pricing plans offered to customers [Member]
Disaggregation of Revenue [Line Items]
Electricity	39,297	44,002
Natural Gas	17,644	21,628
Other
Total	56,941	65,630
Other [Member] | Pricing plans offered to customers [Member]
Disaggregation of Revenue [Line Items]
Electricity
Natural Gas
Other	5,297	505
Total	$ 5,297	$ 505

Revenue Recognition (Details 1)

Revenue Recognition (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Electricity	$ 62,614	$ 65,335
Natural Gas	18,706	23,428
Other	5,297	505
Total	86,617	89,268
Non Commercial and commercial [Member]
Disaggregation of Revenue [Line Items]
Electricity	62,614	65,335
Natural Gas	18,706	23,428
Other	5,297	505
Total	86,617	89,268
Non-Commercial Channel [Member] | Non Commercial and commercial [Member]
Disaggregation of Revenue [Line Items]
Electricity	60,341	62,844
Natural Gas	16,527	21,381
Other
Total	76,868	84,225
Commercial Channel [Member] | Non Commercial and commercial [Member]
Disaggregation of Revenue [Line Items]
Electricity	2,273	2,491
Natural Gas	2,179	2,047
Other
Total	4,452	4,538
Other [Member] | Non Commercial and commercial [Member]
Disaggregation of Revenue [Line Items]
Electricity
Natural Gas
Other	5,297	505
Total	$ 5,297	$ 505

Acquisitions and Divestiture (D

Acquisitions and Divestiture (Details) - USD ($) $ in Thousands	Jan. 02, 2019	Oct. 25, 2018	Mar. 31, 2019	Dec. 31, 2018
Lumo Energia Oyj [Member]
Business Acquisition [Line Items]
Cash	$ 1,539
Trade accounts receivable	2,520
Other current assets	411
Intangible assets:
Trademark	294
Non-compete agreement	34
Customer relationship	2,150
Goodwill	2,090
Other assets	95
Accounts and other current liabilities	(2,403)
Short-term debts	(2,260)
Other liabilities	(195)
Noncontrolling interest	(884)
Net assets	3,391
Supplemental information:
Cash contributed	1,522
Cash paid	1,869
Total considerations	$ 3,391
Prism Solar Technologies, Inc. [Member]
Business Acquisition [Line Items]
Cash		$ 931
Trade accounts receivable		11
Inventories		1,142
Other current assets		260
Property plant and equipment		3,564
Intangible assets:
Trademark		320
Patents		370
Customer relationship		1,600
Goodwill		804
Accounts payable accrued expenses		(1,723)
Notes payable — current portion		63
Notes payable — net of current portion		(885)
Other liabilities		(1,164)
Noncontrolling interest		(2,667)
Net assets		2,500
Supplemental information:
Cash contributed		899
Notes receivable from Prism, including accrued interest, converted to Prism's equity		1,351
Cash payment to previous equity holders of Prism		250
Cash paid		2,500
Notes payable issued to Prism		1,500
Total considerations		$ 4,000

Acquisitions and Divestiture _2

Acquisitions and Divestiture (Details 1) - Prism Solar Technologies, Inc. [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Oct. 25, 2018
Business Acquisition [Line Items]
5.95% note payable, due in monthly payments of $7,184 including interest, through November 2019 when the balloon payment is due, collateralized by Prism's assets	$ 888	$ 893	$ 918
20.00% demand note payable, uncollaterlized	30	30	30
Total notes payable	918	923	948
Less: Current maturities	918	923	63
Noncurrent portion			$ 885

Acquisitions and Divestiture _3

Acquisitions and Divestiture (Details 2) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Net income attributable to Genie Energy Ltd. common stockholders	$ 6,160	$ 5,859
Earnings per share attributable to Genie energy Ltd. common stockholders
Basic	$ 0.21	$ 0.24
Diluted	$ 0.21	$ 0.24
Atid Drilling Ltd. [Member]
Business Acquisition [Line Items]
Total revenues		$ 93,112
Net income		3,162
Net income attributable to Genie Energy Ltd. common stockholders		$ 3,562
Earnings per share attributable to Genie energy Ltd. common stockholders
Basic		$ 0.15
Diluted		$ 0.15

Acquisitions and Divestiture _4

Acquisitions and Divestiture (Details Textual) - USD ($) $ in Thousands	Jan. 02, 2019	Jan. 02, 2019	Oct. 25, 2018	Oct. 25, 2018	Oct. 25, 2018	Mar. 31, 2019	Oct. 31, 2018	Apr. 12, 2019	Sep. 30, 2018	Sep. 01, 2018	Sep. 30, 2017
Letter of Credit [Member]
Acquisitions (Textual)
Working capital						$ 400
Atid Drilling Ltd. [Member]
Acquisitions (Textual)
Assets held for sale											$ 2,700
Percentage of divestiture interest										37.50%
Equity of net book value						1,000
Atid Drilling Ltd. [Member] | Howard Jonas [Member]
Acquisitions (Textual)
Percentage of divestiture interest									37.50%
Atid Drilling Ltd. [Member] | Chief Financial Officer [Member]
Acquisitions (Textual)
Percentage of divestiture interest									25.00%
Lumo Energia Oyj [Member]
Acquisitions (Textual)
Aggregate cash payment	$ 1,869
Percentage of acquire controlling interest	20.00%	20.00%
Business Combination, Consideration Transferred	$ 3,391
Business Acquisition, Pro Forma Revenue						4,800
Short-term debts	$ 2,260	$ 2,260
Weighted average interest rate	3.75%	3.75%
Acquisition of purchase agreement	The Company completed the purchase of an 80% controlling interest in Lumo Energia Oyj ("Lumo"), a Finnish public limited company. The Company paid the sellers a total of €1.6 million (equivalent to $1.9 million). The Company contributed €1.3 million (equivalent to $1.5 million) as a capital loan to fund Lumo's working capital requirements. The Company also provided Lumo with a secured loan for €2.0 million (equivalent to $2.3 million) to pay off and replace its remaining debt. The secured loan is payable in 4 years and bears interest at annual rate of 4.0%, payable monthly. The Company also issued 176,104 shares of its Class B common stock to certain of the sellers which are subject to restrictions as described in the agreement (the “ Lumo Restricted Shares”). The Lumo Restricted Shares are subject to vesting conditions related to employment and services to be provided by the recipients of up to three years. The Lumo Restricted Shares are accounted for as a share-based compensation and is amortized to the consolidated statement of income over the vesting period of three years
Lumo Energia Oyj [Member] | Three Annual Installment [Member]
Acquisitions (Textual)
Vesting interest rate		12.50%
Trade Names [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	5 years
Non Compete Agreements [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	3 years
Customer Relationships [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	2 years
Prism Solar Technologies, Inc. [Member]
Acquisitions (Textual)
Aggregate cash payment					$ 1,100
Additional amount to be paid					1,500
Bridge Loan			$ 1,400	$ 1,400	$ 1,400		$ 1,300
Fixed annual interest rate							12.00%
Percentage of acquire controlling interest			60.00%	60.00%	60.00%
Business Combination, Consideration Transferred				$ 4,000
Business Acquisition, Pro Forma Revenue						$ 3,300
Note payable interest rate						5.95%
Due payment of notes payable						$ 7,184
Demand note payable interest						20.00%
Prism Solar Technologies, Inc. [Member] | Property, Plant and Equipment [Member]
Acquisitions (Textual)
Property, Plant and Equipment, Useful Life			19 years
Prism Solar Technologies, Inc. [Member] | Subsequent Event [Member]
Acquisitions (Textual)
Percentage of acquire controlling interest								100.00%
Prism Solar Technologies, Inc. [Member] | Plus EnerG, Inc. [Member] | Subsequent Event [Member]
Acquisitions (Textual)
Percentage of acquire controlling interest								60.00%
Prism Solar Technologies, Inc. [Member] | Trade Names [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life			10 years
Prism Solar Technologies, Inc. [Member] | Trademark and Patent [Member]
Acquisitions (Textual)
Increase (decrease) in intangible assets						$ 100
Prism Solar Technologies, Inc. [Member] | Customer Relationships [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life			3 years
Increase (decrease) in intangible assets						200
Prism Solar Technologies, Inc. [Member] | Patents [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life			10 years
Prism Solar Technologies, Inc. [Member] | Goodwill [Member]
Acquisitions (Textual)
Increase (decrease) in intangible assets						$ (300)

Divestiture of Majority Interes

Divestiture of Majority Interest in Atid Drilling Ltd. (Details) - New Atid [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Revenues	$ 2,055
Operating expenses:
Cost of revenues	1,340
Selling, general and administrative expenses
Loss from operations	715
Net loss	707
Genie's equity in net loss	$ 274

Divestiture of Majority Inter_2

Divestiture of Majority Interest in Atid Drilling Ltd. (Details Textual) $ in Millions	Mar. 31, 2019USD ($)
Divestiture of Majority Interest in Atid Drilling Ltd. Assets and Liabilities (Textual)
Notes receivable	$ 0.1
Outstanding balance of credit facility	$ 0.2

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Recurring [Member] - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Assets:
Derivative contracts		$ 481	$ 1,574
Liabilities:
Derivative contracts		1,111	2,348
Level 1 [Member]
Assets:
Derivative contracts	[1]	370	1,107
Liabilities:
Derivative contracts	[1]	892	2,100
Level 2 [Member]
Assets:
Derivative contracts	[2]	111	467
Liabilities:
Derivative contracts	[2]	219	248
Level 3 [Member]
Assets:
Derivative contracts	[3]
Liabilities:
Derivative contracts	[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 (Deta_2

Fair Value Measurements (Details Textual) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value Measurements (Textual)
Financial instrument included in other assets	$ 0.5	$ 0.5

Derivative Instruments (Details

Derivative Instruments (Details)	3 Months Ended
	Mar. 31, 2019
Electricity (in MWH) [Member] | Second quarter 2019 [Member]
Derivative [Line Items]
Volume	28,864
Electricity (in MWH) [Member] | Third quarter 2019 [Member]
Derivative [Line Items]
Volume	44,608
Electricity (in MWH) [Member] | Fourth quarter 2019 [Member]
Derivative [Line Items]
Volume	35,344
Electricity (in MWH) [Member] | First quarter 2020 [Member]
Derivative [Line Items]
Volume	186,560
Electricity (in MWH) [Member] | Second quarter 2020 [Member]
Derivative [Line Items]
Volume	5,120
Electricity (in MWH) [Member] | Third quarter 2020 [Member]
Derivative [Line Items]
Volume	22,800
Electricity (in MWH) [Member] | Fourth quarter 2020 [Member]
Derivative [Line Items]
Volume	5,120
Electricity (in MWH) [Member] | First quarter 2021 [Member]
Derivative [Line Items]
Volume
Electricity (in MWH) [Member] | Second quarter 2021 [Member]
Derivative [Line Items]
Volume
Electricity (in MWH) [Member] | Third quarter 2021 [Member]
Derivative [Line Items]
Volume
Electricity (in MWH) [Member] | Fourth quarter 2021 [Member]
Derivative [Line Items]
Volume
Electricity (in MWH) [Member] | First quarter 2022 [Member]
Derivative [Line Items]
Volume
Natural gas (in Dth) [Member] | Second quarter 2019 [Member]
Derivative [Line Items]
Volume	80,125
Natural gas (in Dth) [Member] | Third quarter 2019 [Member]
Derivative [Line Items]
Volume	86,300
Natural gas (in Dth) [Member] | Fourth quarter 2019 [Member]
Derivative [Line Items]
Volume	1,163,050
Natural gas (in Dth) [Member] | First quarter 2020 [Member]
Derivative [Line Items]
Volume	1,101,477
Natural gas (in Dth) [Member] | Second quarter 2020 [Member]
Derivative [Line Items]
Volume	67,550
Natural gas (in Dth) [Member] | Third quarter 2020 [Member]
Derivative [Line Items]
Volume	34,850
Natural gas (in Dth) [Member] | Fourth quarter 2020 [Member]
Derivative [Line Items]
Volume	38,800
Natural gas (in Dth) [Member] | First quarter 2021 [Member]
Derivative [Line Items]
Volume	40,300
Natural gas (in Dth) [Member] | Second quarter 2021 [Member]
Derivative [Line Items]
Volume	29,650
Natural gas (in Dth) [Member] | Third quarter 2021 [Member]
Derivative [Line Items]
Volume	21,500
Natural gas (in Dth) [Member] | Fourth quarter 2021 [Member]
Derivative [Line Items]
Volume	15,750
Natural gas (in Dth) [Member] | First quarter 2022 [Member]
Derivative [Line Items]
Volume	9,750

Derivative Instruments (Detai_2

Derivative Instruments (Details 1) - Energy contracts and options [Member] - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Asset Derivatives not designated or not qualifying as hedging instruments		$ 481	$ 1,574
Liability Derivatives not designated or not qualifying as hedging instruments		1,111	2,348
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]	282	1,116
Other 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		199	458
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	[1]	856	2,028
Other 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		$ 255	$ 320
[1]	The Company classifies derivative assets and liabilities as current based on the cash flows expected to be incurred within the following 12 months.

Derivative Instruments (Detai_3

Derivative Instruments (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Energy contracts and options [Member] | Cost of revenues [Member]
Effects of derivative instruments on the consolidated statements of operations
Amount of Gain (Loss) Recognized on Derivatives	$ (2,909)	$ (83)

Investment in Equity Method I_3

Investment in Equity Method Investees (Details) - Shoreditch [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 3,911	$ 114
Operating expenses:
Cost of revenues	3,700	133
Selling, general and administrative	1,807	760
Loss from operations	(1,596)	(779)
Other
Net Income	(1,596)	(779)
Genie's equity in net loss	$ (1,070)	$ (506)

Investment in Equity Method I_4

Investment in Equity Method Investees (Details1) - New Atid [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Revenues	$ 2,055
Operating expenses:
Cost of revenues	1,340
Selling, general and administrative
Loss from operations	715
Other	(8)
Net Income	707
Genie's equity in net loss	$ 274

Investment in Equity Method I_5

Investment in Equity Method Investees (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Aug. 31, 2017
Investment in Shoreditch Energy Limited (Textual)
Percentage of ownership					4.00%
Net book value of investments		$ 0.8
Description of joint venture agreement		 March 31, 2019, the Company contributed a total of $5.3 million to Shoreditch and owns 67% of the equity.
Outstanding balance, including accrued interest	$ 0.1
Notes Receivable, Related Parties		$ 0.1
EGC [Member]
Investment in Shoreditch Energy Limited (Textual)
Net book value of investments		0.6
Loan amount			$ 0.2
Annual interest rate			2.00%
Due date			Sep. 17, 2023
Outstanding balance, including accrued interest		$ 0.2
New Atid [Member]
Investment in Shoreditch Energy Limited (Textual)
Equity Interest in Joint Venture Percentage				37.50%

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Beginning Balance	$ 11,082
Prisim acquisition purchase price allocation adjustment (see Note 5)	(280)
Acquisition of Lumo (see Note 5)	2,090
Translation adjustment	131
Ending Balance	13,023
GRE [Member]
Beginning Balance	9,998
Prisim acquisition purchase price allocation adjustment (see Note 5)
Acquisition of Lumo (see Note 5)
Translation adjustment
Ending Balance	9,998
Genie Energy International Corporation [Member]
Beginning Balance
Prisim acquisition purchase price allocation adjustment (see Note 5)
Acquisition of Lumo (see Note 5)	2,090
Translation adjustment	131
Ending Balance	2,221
GES [Member]
Beginning Balance	1,084
Prisim acquisition purchase price allocation adjustment (see Note 5)	(280)
Acquisition of Lumo (see Note 5)
Translation adjustment
Ending Balance	$ 804

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,826	$ 9,092
Accumulated Amortization	3,317	2,771
Net Balance	$ 8,509	$ 6,321
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	17 years 1 month 6 days	17 years 3 months 18 days
Gross Carrying Amount	$ 3,838	$ 3,470
Accumulated Amortization	357	288
Net Balance	$ 3,481	$ 3,182
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	1 year 7 months 6 days	2 years
Gross Carrying Amount	$ 148	$ 115
Accumulated Amortization	117	112
Net Balance	$ 31	$ 3
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	3 years 10 months 24 days	4 years
Gross Carrying Amount	$ 6,945	$ 4,612
Accumulated Amortization	2,783	2,334
Net Balance	$ 4,162	2,278
Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	10 years
Gross Carrying Amount	$ 895	895
Accumulated Amortization	60	37
Net Balance	$ 835	$ 858

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Other Intangible Assets [Abstract]
Amortization expense of intangible assets	$ 0.7	$ 0.3
Amortization expense of finite lives intangible assets, 2019	1.5
Amortization expense of finite lives intangible assets, 2020	2.1
Amortization expense of finite lives intangible assets, 2021	1
Amortization expense of finite lives intangible assets, 2022	0.5
Amortization expense of finite lives intangible assets, 2023	0.5
Amortization expense of finite lives intangible assets, 2024	$ 2.9

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 31, 2019
Leases [Abstract]
ROU Assets	$ 2,293
Current portion of operating lease liabilities	370	$ 400
Noncurrent portion of operating lease liabilities	$ 1,941	2,000
Total		$ 2,400

Leases (Details 1)

Leases (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
ROU assets obtained in the exchange for lease liabilities
Operating leases	$ 80
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows form operating activities	$ 136

Leases (Details 2)

Leases (Details 2) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 31, 2019
Leases [Abstract]
Remainder of 2019	$ 406
2020	426
2021	376
2022	217
2023	221
Thereafter	1,530
Total future lease payments	3,176
Less imputed interest	$ 865
Total operating lease liabilities		$ 2,400

Leases (Details Textual)

Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Operating lease rent	$ 0.2	$ 0.1
Weighted average remaining lease term	8 years 10 months 24 days
Weighted average discounts rate	7.20%

Equity (Details)

Equity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)$ / shares
Series 2012-A Preferred Stock (''Preferred Stock'') [Member] | January 16, 2018 [Member]
Class of Stock [Line Items]
Declaration Date	Jan. 16, 2018
Dividend Per Share | $ / shares	$ 0.1594
Aggregate Dividend Amount | $	$ 370
Record Date	Feb. 6, 2018
Payment Date	Feb. 15, 2018
Class A Common Stock and Class B Common Stock [Member] | March 7, 2018 [Member]
Class of Stock [Line Items]
Declaration Date	Mar. 7, 2018
Dividend Per Share | $ / shares	$ 0.0750
Aggregate Dividend Amount | $	$ 2,006
Record Date	Mar. 19, 2018
Payment Date	Mar. 23, 2018

Equity (Details Textual)

Equity (Details Textual) - USD ($)

Feb. 11, 2019

Jan. 02, 2019

Nov. 05, 2018

Jun. 12, 2018

Oct. 25, 2018

Jun. 30, 2018

Jun. 08, 2018

May 07, 2018

Mar. 31, 2019

Mar. 31, 2018

Sep. 30, 2018

Aug. 31, 2017

Mar. 11, 2013

Equity (Textual)

Remaining number of shares available for repurchase

6,900,000

Dividends on preferred stock

$ 370,000

$ 370,000

Unrecognized compensation cost

$ 2,600,000

Percentage of ownership

4.00%

Percentage ownership after all transactions

86.10%

Lieu of cash bonus

$ 300,000

Weighted-average period

2 years 3 months 18 days

Recognized cost term

1 year 7 months 6 days

GRE [Member]

Equity (Textual)

Unrecognized compensation cost

$ 100

Percentage of ownership

4.50%

Recognized cost term

1 year 8 months 12 days

Howard S. Jonas [Member]

Equity (Textual)

Stockholders grant of options purchase

126,176

Exercise price

$ 8.05

Rothschild [Member] | GOGAS [Member]

Equity (Textual)

Company's investment, ownership percentage in subsidiary

5.00%

Fair value of common stock

$ 220,000

Number of common stock shares issued

41,667

Percentage ownership before all transactions

92.00%

Percentage ownership after all transactions

97.00%

Preferred Stock [Member]

Equity (Textual)

Preferred stock, dividends per share

$ 0.1594

Dividends on preferred stock

Paid date of declared dividend

May 15, 2019

Record date of declared dividend

May 6, 2019

Class A common stock [Member]

Equity (Textual)

Dividends on preferred stock

Dividends declared per common share

$ 0.075

Class B common stock [Member]

Equity (Textual)

Number of stock authorized to be repurchased

7,000,000

Dividends on preferred stock

Dividends declared per common share

$ 0.075

Warrants expiry term

Jun. 30, 2023

Paid date of declared dividend

Nov. 30, 2018

Record date of declared dividend

Nov. 19, 2018

Number of common stock shares issued

176,104

Warrants to purchase shares

1,257,862

Warrants exercise price per share

$ 4.77

Class B common stock [Member] | Stock-Based Compensation [Member]

Equity (Textual)

Stock option and incentive plan to reserve

974,199

Class B common stock [Member] | Howard S. Jonas [Member]

Equity (Textual)

Warrants expiry term

Jun. 30, 2023

Sale of shares

1,152,074

Sale of shares price per share

$ 4.34

Amount of aggregate sales price

$ 5,000,000

Warrants to purchase shares

1,048,218

Warrants exercise price per share

$ 4.77

Amount of warrants aggregate exercise price

$ 5,000,000

Class B common stock [Member] | Investor [Member]

Equity (Textual)

Sale of shares

230,415

Sale of shares price per share

$ 4.34

Amount of aggregate sales price

$ 1,000,000

Warrants to purchase shares

209,644

Warrants exercise price per share

$ 4.77

Amount of warrants aggregate exercise price

$ 1,000,000

Variable Interest Entity (Detai

Variable Interest Entity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Variable Interest Entity [Abstract]
Net (loss) income	$ 149	$ (268)
Aggregate funding repaid to (provided by) the Company, net	$ 176	$ (95)

Variable Interest Entity (Det_2

Variable Interest Entity (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total assets	$ 1,411	$ 1,463
Total liabilities and noncontrolling interests	1,411	1,463
Cash and cash equivalents [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total assets	29	70
Trade accounts receivable [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total assets	667	623
Other current assets [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total assets	356	411
Other assets [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total assets	359	359
Current liabilities [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total liabilities and noncontrolling interests	489	513
Due to IDT Energy [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total liabilities and noncontrolling interests	1,773	1,949
Noncontrolling interests [Member]
Variable Interest Entity Classifications Of Carrying Amount Assets And Liabilities Net [Abstract]
Total liabilities and noncontrolling interests	$ (851)	$ (999)

Variable Interest Entity (Det_3

Variable Interest Entity (Details Textual) - CCE [Member] $ in Millions	1 Months Ended
	Oct. 31, 2015USD ($)
Variable Interest Entity (Textual)
Forgiveness of loan	$ 0.5
Expiration date of the option	Oct. 22, 2023
Percentage of option to purchase	100.00%

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Taxes (Textual)
Percentage of Effective tax rate	32.00%	12.00%

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Basic weighted-average number of shares	26,532,000	24,239,000
Effect of dilutive securities:
Stock options and warrants	540
Non-vested restricted Class B common stock	168	56
Diluted weighted-average number of shares	27,240,000	24,295,000

Earnings Per Share (Details 1)

Earnings Per Share (Details 1) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock options and warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and warrants		381

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Summary of related party transactions
Amount IDT charged the Company	$ 182	$ 316
IDT [Member]
Summary of related party transactions
Amount charged by the Company	37	121
Rafael [Member]
Summary of related party transactions
Amount charged by the Company	$ 54

Related Party Transactions (D_2

Related Party Transactions (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
IDT [Member]
Related Party Transaction [Line Items]
Due to related parties	$ 174	$ 267
Due from related parties	37	33
Rafael [Member]
Related Party Transaction [Line Items]
Due to related parties

Related Party Transactions (D_3

Related Party Transactions (Details Textual) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2015
Related Party Transactions (Textual)
Employee paid	$ 400,000			$ 500,000
Outstanding balance	500,000
Accrued interest	$ 100,000
New note payment terms, description	 December 2020 and December 2052.
Payment of insurance premium			$ 300
Net book value		$ 172,000
New Note [Member]
Related Party Transactions (Textual)
Outstanding balance	$ 100,000	$ 100,000

Business Segment Information (D

Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating results for the business segments
Revenues	$ 86,617	$ 89,268
Income (loss) from operations	9,834	7,133
Exploration		227
Equity in the net loss of equity method investees	797	506
GRE [Member]
Operating results for the business segments
Revenues	76,517	88,766
Income (loss) from operations	13,503	11,016
Exploration
Equity in the net loss of equity method investees
Gre International [Member]
Operating results for the business segments
Revenues	4,843
Income (loss) from operations	(1,744)	(69)
Exploration
Equity in the net loss of equity method investees	(1,070)	(506)
GES [Member]
Operating results for the business segments
Revenues	5,257
Income (loss) from operations	(231)	(92)
Exploration
Equity in the net loss of equity method investees
GOGAS [Member]
Operating results for the business segments
Revenues
Income (loss) from operations	(163)	(1,361)
Exploration
Equity in the net loss of equity method investees	273
Corporate [Member]
Operating results for the business segments
Revenues
Income (loss) from operations	(1,531)	(2,361)
Exploration
Equity in the net loss of equity method investees

Business Segment Information _2

Business Segment Information (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Summary total assets for the business segments
Total assets	$ 154,236	$ 146,864
GRE [Member]
Summary total assets for the business segments
Total assets	112,401	113,918
Gre International [Member]
Summary total assets for the business segments
Total assets	11,760	3,654
GES [Member]
Summary total assets for the business segments
Total assets	9,801	11,519
GOGAS [Member]
Summary total assets for the business segments
Total assets	13,346	15,375
Corporate [Member]
Summary total assets for the business segments
Total assets	$ 6,928	$ 2,398

Business Segment Information _3

Business Segment Information (Details Textual)	3 Months Ended
	Mar. 31, 2019Segment
Business Segment Information (Textual)
Company's investment, ownership percentage in subsidiary	86.10%
Number of reportable segments	4

Commitments and Contingencies_2

Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2019USD ($)
Commitments and Contingencies [Abstract]
Remainder of 2019	$ 60,488
2020	45,131
2021	2,708
2022	548
Thereafter
Total payments	$ 108,875

Commitments and Contingencies_3

Commitments and Contingencies (Details Textual)		3 Months Ended
		Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Commitments and Contingencies (Textual)
Purchase of future commitments		$ 108,875,000,000
Total investigation accrual		24,402,000		$ 25,242,000
RCEs transferred to incumbent utilities			10,600
Selling, general and administrative expense	[1]	15,708,000	$ 17,098,000
Liability related to Lawsuit		$ 400
[1]	Stock-based compensation included in selling, general and administrative expenses

Lines of Credit (Details)

Lines of Credit (Details) - USD ($) $ in Thousands	Apr. 04, 2017	Dec. 18, 2018	Mar. 31, 2019	Dec. 31, 2018
Lines of Credit (Textual)
Revolving loan facility			$ 2,516	$ 2,516
JPMorgan Chase Bank [Member]
Lines of Credit (Textual)
Credit facility, description		The Company entered into a Credit Agreement with JPMorgan Chase Bank (“Credit Agreement”) for a $5.0 million credit line facility (“Credit Line”) which expires on December 31, 2019. The Company will pay a commitment fee of 0.10% per annum on unused portion of the Credit Line as specified in the Credit Agreement. The borrowed amounts will be in the form of letters of credit which will bear interest of 1.0% per annum. The Company will also pay a fee for each letter of credit that is issued equal to the greater of $500 or 1.00% of the original maximum available amount of the letter 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 $5.1 million. As of March 31, 2019, there were no amounts borrowed under the line of credit. At March 31, 2019, the cash collateral of $5.2 million was included in restricted cash—short-term in the consolidated balance sheet.
Vantage Commodities Financial Services II, LLC [Member] | GRE Credit Agreement [Member]
Lines of Credit (Textual)
Revolving loan facility			$ 2,500	$ 2,500
Maximum principal amount on revolving line of credit	$ 20,000
Interest rate on principal outstanding, description	outstanding principal amount incurs interest at LIBOR plus 4.5% per annum
Effective interest rate			7.13%	7.24%
Maturity date	Apr. 3, 2020

Recently Issued Accounting St_2

Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 31, 2019	Dec. 31, 2018
Recently Issued Accounting Standards [Abstract]
Lease liabilites		$ 2,400
Current lease liabilities	$ 370	400
Noncurrent lease liabilities	1,941	2,000
Accumulated deficit	$ (50,558)	$ 300	$ (53,939)