XML 12 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2020
Aug. 06, 2020
Entity Registrant Name Genie Energy Ltd.  
Entity Central Index Key 0001528356  
Document Type 10-Q  
Document Period End Date Jun. 30, 2020  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Shell Company true  
Document Fiscal Period Focus Q2  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Document Fiscal Year Focus 2020  
Entity Emerging Growth Company false  
Entity File Number 1-35327  
Entity Tax Identification Number 45-2069276  
Entity Interactive Data Current Yes  
Entity Incorporation, State or Country Code DE  
Trading Symbol GNE  
Title of 12(b) Security Class B common stock, par value $0.01 per share  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
Entity Address, Address Line One 520 Broad Street,  
Entity Address, City or Town Newark  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07102  
City Area Code 973  
Local Phone Number 438-3500  
Class A common stock    
Entity Common Stock, Shares Outstanding   1,574,326
Class B common stock    
Entity Common Stock, Shares Outstanding   24,520,245