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Note 3 - Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2024
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
|  | (in thousands) |
Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rockies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Oil |  | $ | 1,851 |  |  | $ | 3,106 |  |  | $ | 5,614 |  |  | $ | 7,915 |
Natural gas and liquids |  |  | 45 |  |  |  | 44 |  |  |  | 127 |  |  |  | 260 |
Total |  | $ | 1,896 |  |  | $ | 3,150 |  |  | $ | 5,741 |  |  | $ | 8,175 |
West Texas, South Texas, and Gulf Coast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Oil |  | $ | 1,107 |  |  | $ | 3,138 |  |  | $ | 4,513 |  |  | $ | 9,115 |
Natural gas and liquids |  |  | - |  |  |  | 103 |  |  |  | 114 |  |  |  | 424 |
Total |  | $ | 1,107 |  |  | $ | 3,241 |  |  | $ | 4,627 |  |  | $ | 9,539 |
Mid-Continent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Oil |  | $ | 1,417 |  |  | $ | 1,567 |  |  | $ | 4,447 |  |  | $ | 4,905 |
Natural gas and liquids |  |  | 537 |  |  |  | 783 |  |  |  | 1,579 |  |  |  | 2,373 |
Total |  | $ | 1,954 |  |  | $ | 2,350 |  |  | $ | 6,026 |  |  | $ | 7,278 |
Combined Total |  | $ | 4,957 |  |  | $ | 8,741 |  |  | $ | 16,394 |  |  | $ | 24,992 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Nine Months Ended |
|  | September 30, |
|  | 2024 |  |  | 2023 |
Purchaser A |  |  | 26 | % |  |  | 23 | %
Purchaser B |  |  | 26 | % |  |  | 19 | %
Purchaser C |  |  | 12 | % |  |  | 9 | %

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