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v3.23.3

Note 12 - Major Customers (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
(In thousands) |  | Revenues |  |  | Percent |  |  | Revenues |  |  | Percent |  |  | Revenues |  |  | Percent |  |  | Revenues |  |  | Percent |
Alpha Metallurgical Resources, Inc. (1) |  | $ | 17,219 |  |  |  | 20 | % |  | $ | 21,000 |  |  |  | 21 | % |  | $ | 61,122 |  |  |  | 22 | % |  | $ | 81,638 |  |  |  | 28 | %
Foresight Energy Resources LLC ("Foresight") (1) |  | $ | 18,600 |  |  |  | 22 | % |  | $ | 19,334 |  |  |  | 19 | % |  | $ | 43,453 |  |  |  | 16 | % |  | $ | 47,081 |  |  |  | 16 | %

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