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Note 12 - Related Party Transactions (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 29, 2022
Interest expense, net | $ (6,829) | $ (2,556) | $ (1,224) |
Long term debt | 128,896 |  |  |
Ramaco Coal Loan |  |  |  |
Interest rate |  |  |  | 9.00%
Long term debt | 40,000 |  |  |
Ramaco Coal, LLC |  |  |  |
Royalties paid | 3,100 | 5,700 | 4,500 |
Interest expense, net | 3,000 |  |  |
Ramaco Coal, LLC | On-Going Administrative Services |  |  |  |
Related party fees | 44 | 100 | $ 200 |
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 |  |  |

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