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Note 11 - Related Party Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Legal services payable $ 35,000   $ 35,000    
Legal services paid 0        
Interest expense, net (2,255) $ (933) (5,323) $ (1,418)  
Legal Services          
Legal services payable 600   600   $ 0
Ramaco Coal, LLC          
Royalties paid   1,300 3,100 3,900  
Interest expense, net 1,100   2,000    
Ramaco Coal, LLC | On-Going Administrative Services          
Related party fees   $ 40 44 79  
Ramaco Coal, LLC | Accounts Payable and Accrued Liabilities | Mineral Lease and Surface Rights Agreements          
Due to Related Parties, Total         $ 400
Jones | Legal Services          
Payments for legal services     $ 800 $ 0  
Ramaco Foundation          
Amount of charitable cash contribution $ 1,000