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Note 2 - Revenues From Contracts With Customers (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
(In thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Coal royalty revenues |  | $ | 55,544 |  |  | $ | 52,381 |  |  | $ | 161,527 |  |  | $ | 170,775 |
Production lease minimum revenues |  |  | 850 |  |  |  | 1,885 |  |  |  | 2,025 |  |  |  | 3,542 |
Minimum lease straight-line revenues |  |  | 4,464 |  |  |  | 4,778 |  |  |  | 13,414 |  |  |  | 14,235 |
Carbon neutral initiative revenues |  |  | 681 |  |  |  | 8,600 |  |  |  | 2,914 |  |  |  | 8,600 |
Property tax revenues |  |  | 1,770 |  |  |  | 1,360 |  |  |  | 4,710 |  |  |  | 4,527 |
Wheelage revenues |  |  | 2,385 |  |  |  | 2,977 |  |  |  | 9,538 |  |  |  | 11,073 |
Coal overriding royalty revenues |  |  | 827 |  |  |  | 1,367 |  |  |  | 1,165 |  |  |  | 2,307 |
Lease amendment revenues |  |  | 623 |  |  |  | 759 |  |  |  | 2,322 |  |  |  | 2,450 |
Aggregates royalty revenues |  |  | 736 |  |  |  | 884 |  |  |  | 2,175 |  |  |  | 2,691 |
Oil and gas royalty revenues |  |  | 324 |  |  |  | 6,170 |  |  |  | 5,126 |  |  |  | 10,890 |
Other revenues |  |  | 329 |  |  |  | 218 |  |  |  | 895 |  |  |  | 705 |
Royalty and other mineral rights revenues |  | $ | 68,533 |  |  | $ | 81,379 |  |  | $ | 205,811 |  |  | $ | 231,795 |
Transportation and processing services revenues (1) |  |  | 4,579 |  |  |  | 5,969 |  |  |  | 11,447 |  |  |  | 15,377 |
Total Mineral Rights segment revenues |  | $ | 73,112 |  |  | $ | 87,348 |  |  | $ | 217,258 |  |  | $ | 247,172 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | September 30, |  |  | December 31, |
(In thousands) |  | 2023 |  |  | 2022 |
Receivables |  |  |  |  |  |  |  |
Accounts receivable, net |  | $ | 34,775 |  |  | $ | 39,004 |
Other current assets, net (1) |  |  | 2,382 |  |  |  | — |
Other long-term assets, net (2) |  |  | — |  |  |  | 75 |
Contract liabilities |  |  |  |  |  |  |  |
Current portion of deferred revenue |  | $ | 6,399 |  |  | $ | 6,256 |
Deferred revenue |  |  | 35,076 |  |  |  | 40,181 |
|  | For the Nine Months Ended September 30, |
(In thousands) |  | 2023 |  |  | 2022 |
Balance at beginning of period (current and non-current) |  | $ | 46,437 |  |  | $ | 61,862 |
Increase due to minimums and lease amendment fees |  |  | 11,525 |  |  |  | 11,309 |
Recognition of previously deferred revenue |  |  | (16,487 | ) |  |  | (28,403 | )
Balance at end of period (current and non-current) |  | $ | 41,475 |  |  | $ | 44,768 |
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] |
Lease Term (1) |  | Weighted Average Remaining Years |  |  | Annual Minimum Payments |
0 - 5 years |  |  | 1.7 |  |  | $ | 19,867 |
5 - 10 years |  |  | 4.8 |  |  |  | 10,417 |
10+ years |  |  | 12.0 |  |  |  | 27,129 |
Total |  |  | 7.2 |  |  | $ | 57,413 |

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- Definition Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479773/842-30-50-12 + Details
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