v3.26.1
Note 2 - Description of Business and Summary of Significant Accounting Policies (Details Textual)
shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Gain from Tax Credit Received                       $ 3,100      
Cost of Revenue $ 87,766 $ 108,305 $ 81,771 $ 99,444 $ 69,447 $ 74,010 $ 57,360 $ 85,902 $ 71,291 $ 83,967 $ 55,255 $ 71,989 $ 377,286 $ 286,719 $ 282,502
Inventory Valuation Reserves 1,300       400       $ 1,100       1,300 400 1,100
Property, Plant and Equipment, Transfers and Changes $ 2,700                       $ 2,700 1,100  
Number of Reportable Segments                         2    
Number of Reporting Units                         4    
Shipping and Handling Freight Charges                             100
Distribution and Handling Costs                         $ 200 100 100
Advertising Expense                         $ 7,500 $ 5,900 $ 6,200
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares                         0 0 0
Patents and Trademarks [Member] | Minimum [Member]                              
Finite-Lived Intangible Assets, Remaining Amortization Period (Year) 10 years                       10 years    
Patents and Trademarks [Member] | Maximum [Member]                              
Finite-Lived Intangible Assets, Remaining Amortization Period (Year) 20 years                       20 years    
Customer Relationships [Member] | Licenses [Member]                              
Finite-Lived Intangible Assets, Remaining Amortization Period (Year) 10 years                       10 years    
Construction in Progress [Member]                              
Property, Plant and Equipment, Transfers and Changes                         $ 400    
POR Program [Member]                              
Accounts Receivable, after Allowance for Credit Loss $ 35,300       $ 30,500               35,300 $ 30,500  
Cost of Revenue                         $ 5,300 $ 4,100 $ 3,600
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Oil and Gas [Member]                              
Concentration Risk, Percentage   30.70%   43.30%   28.70%   43.00%   32.50%   48.10%      
Genie Retail Energy (“GRE”) [Member]                              
Subsidiary, Ownership Percentage, Parent 100.00%                       100.00%    
Genie Solar [Member] | Genie Renewables (GREW) [Member]                              
Subsidiary, Ownership Percentage, Parent 95.50%                       95.50%    
CityCom Solar [Member] | Genie Renewables (GREW) [Member]                              
Subsidiary, Ownership Percentage, Parent 93.80%                       93.80%    
Diversegy [Member] | Genie Renewables (GREW) [Member]                              
Subsidiary, Ownership Percentage, Parent 91.50%                       91.50%    
Roded Recycling Industries Ltd. [Member]                              
Subsidiary, Ownership Percentage, Parent 71.00%                       71.00%    
Roded Recycling Industries Ltd. [Member] | Genie Renewables (GREW) [Member]                              
Subsidiary, Ownership Percentage, Parent 72.20%                       72.20%