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Note 12 - Related Party Transactions (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
item
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Apr. 29, 2022
Interest expense, net $ (8,903) $ (6,829) $ (2,556)  
Legal services payable   40,000    
Long term debt 91,383      
Accounts Payable, Current, Total 51,624 34,825    
Financing of Ramaco Coal acquisition - Related party debt        
Interest rate       9.00%
Legal Services        
Legal services payable $ 0 600    
Other Professional Services        
Number of Related paties | item 3      
Professional fees $ 300 100    
Ramaco Coal, LLC        
Royalties paid   3,100 $ 5,700  
Ramaco Coal, LLC | Financing of Ramaco Coal acquisition - Related party debt        
Interest expense, net 1,800 3,000    
Long term debt 0 40,000    
Ramaco Coal, LLC | Accounts Payable        
Accounts Payable, Current, Total 400 400    
Jones & Associates | Legal Services        
Legal services paid $ 0 800    
Ramaco Foundation        
Amount of charitable cash contribution   $ 1,000