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Equity (Details) (USD $)
 0 Months Ended 5 Months Ended 12 Months Ended 1 Months Ended 5 Months Ended 12 Months Ended 1 Months Ended 5 Months Ended 12 Months Ended 1 Months Ended 5 Months Ended 12 Months Ended 12 Months Ended
Nov. 15, 2013
Aug. 15, 2013
May 15, 2013
Feb. 15, 2013
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Dec. 31, 2012
Jul. 31, 2011
Mar. 11, 2013
Oct. 17, 2012
Jun. 30, 2011
GOGAS [Member]
Michael Steinhardt [Member]
Nov. 30, 2010
Rupert Murdoch [Member]
GOGAS [Member]
Nov. 30, 2010
Lord Jacob Rothschild [Member]
GOGAS [Member]
Nov. 30, 2008
IEI [Member]
Harold Vinegar Chief Scientist [Member]
Oct. 31, 2013
Afek Oil and Gas, Ltd. [Member]
Harold Vinegar Chief Scientist [Member]
Nov. 30, 2013
Genie Mongolia [Member]
Harold Vinegar Chief Scientist [Member]
Dec. 31, 2011
Preferred Stock [Member]
Dec. 31, 2013
Preferred Stock [Member]
Dec. 31, 2012
Preferred Stock [Member]
Nov. 30, 2008
Preferred Stock [Member]
IEI [Member]
Harold Vinegar Chief Scientist [Member]
Aug. 31, 2012
Common Class A [Member]
May 31, 2012
Common Class A [Member]
Apr. 30, 2012
Common Class A [Member]
Jan. 31, 2012
Common Class A [Member]
Dec. 31, 2011
Common Class A [Member]
Dec. 31, 2013
Common Class A [Member]
Dec. 31, 2012
Common Class A [Member]
Aug. 31, 2012
Common Class B [Member]
May 31, 2012
Common Class B [Member]
Apr. 30, 2012
Common Class B [Member]
Jan. 31, 2012
Common Class B [Member]
Dec. 31, 2011
Common Class B [Member]
Dec. 31, 2013
Common Class B [Member]
Dec. 31, 2012
Common Class B [Member]
Nov. 26, 2012
Common Class B [Member]
Aug. 02, 2012
Common Class B [Member]
Dec. 31, 2013
Common Class B [Member]
Stock Repurchase Program [Member]
Mar. 11, 2013
Common Class B [Member]
Stock Repurchase Program [Member]
Dec. 31, 2013
Series 2012-A Preferred Stock [Member]
Dec. 31, 2013
February 14 2014 [Member]
Dec. 31, 2013
August 2, 2012 [Member]
Dec. 31, 2013
November 26, 2012 [Member]
Equity (Textual)                                                                                      
Common stock voting rights                                                     Three votes per share.             One-tenth of a vote per share.                  
Preferred stock, liquidation preference per share                                                                               $ 8.5      
Common stock conversion basis                                                     Each share of Class A common stock may be converted into one share of Class B common stock.                                
Preferred stock dividend rate $ 0.1594 $ 0.1594 $ 0.1594 $ 0.1317                                                                       $ 0.6375 $ 0.1594    
Preferred stock, dividend payment rate, variable                                                                              
Seven and one-half percent (7.5%) of the quotient obtained by dividing (A) the amount by which the EBITDA for a fiscal year of the Company's retail energy provider business exceeds $32 million by (B) 8,750,000 (the "Additional Dividend")
      
Excess amount of EBITDA                                                                               $ 32,000,000      
Additional dividend                                                                               8,750,000      
Cash dividend paid                                           $ 0.05 $ 0.05 $ 0.033 $ 0.05       $ 0.05 $ 0.05 $ 0.033 $ 0.05                      
Preferred stock, redemption terms                                                                              
The redemption price for the Preferred Stock is 101% of the Liquidation Preference plus all accrued and unpaid dividends between October 11, 2016 and October 11, 2017, and 100% of the Liquidation Preference plus all accrued and unpaid dividends thereafter.
      
Preferred stock dividend             1,100,000                                                                                 
Number of stock authorized to be repurchased                                                                             7,000,000        
Remaining number of shares available for repurchase                                                                           7,000,000          
Terms of offer to exchange class B common stock shares for preferred stock shares                                                                                   The Company initiated an offer to exchange up to 8.75 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on October 10, 2012. The Company initiated an offer to exchange up to 7.15 million outstanding shares of its Class B common stock for the same number of shares of its Preferred Stock. The offer expired on March 5, 2013.
Common stock exchange into preferred stock                                                                       7,150,000 8,750,000            
Issuance of Series A preferred stock in exchange for class B common stock                   313,376 1,604,591                                                                
Maximum subsidiary capitalization for anti dilution protection                             20,000,000           20,000,000                                            
Minimum subsidiary capitalization for anti dilution protection                             2,000,000           2,000,000                                            
Employment agreement description                               In October of 2013, the Company completed the sale to the employee of 9.5% of the equity in Afek per the terms of his employment agreement.
In November 2013, the Company completed the sale of 9.8% of the equity in Genie Mongolia to Vinegar as per the terms of his employment agreement.
                                                    
Sale of stock consideration received on transaction paid through promissory note                         1,000,000                                                            
Sale of subsidiary stock percentage of ownership sold             10.00%         2.50% 0.50% 5.00% 10.00%           10.00%                                            
Promissory note interest rate                         1.58%                                                            
Promissory note maturity date                         Nov. 15, 2015                                                            
Investment warrant issued description                           warrants were issued to purchase up to an aggregate of 1% of the common stock outstanding of GOGAS at an exercise price of up to $2 million that expired on November 12, 2011                                                          
Investment options and warrants aggregate exercise price                       5,000,000   2,000,000                                                          
Investment options, expiration date                       Apr. 09, 2015   Nov. 12, 2017                                                          
Sales of stock of subsidiary                           10,000,000                                                          
Amount paid to Steinhardt stockholder entity                       1,700,000                                                              
Dividends declared         1,148,000     3,057,000                                                                      
Dividends paid               $ 1,131,000 $ 4,205,000