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Note 3 - Revenue From Contracts With Customers (Tables) | 3 Months Ended
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Mar. 31, 2024
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
|  | (in thousands) |
Revenue: |  |  |  |  |  |  |  |
Rockies |  |  |  |  |  |  |  |
Oil |  | $ | 1,721 |  |  | $ | 2,338 |
Natural gas and liquids |  |  | 41 |  |  |  | 88 |
Total |  | $ | 1,762 |  |  | $ | 2,426 |
West Texas, South Texas, and Gulf Coast |  |  |  |  |  |  |  |
Oil |  | $ | 1,599 |  |  | $ | 2,955 |
Natural gas and liquids |  |  | 46 |  |  |  | 209 |
Total |  | $ | 1,645 |  |  | $ | 3,164 |
Mid-Continent |  |  |  |  |  |  |  |
Oil |  | $ | 1,407 |  |  | $ | 1,802 |
Natural gas and liquids |  |  | 577 |  |  |  | 880 |
Total |  | $ | 1,984 |  |  | $ | 2,682 |
Combined Total |  | $ | 5,391 |  |  | $ | 8,272 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Three Months Ended |
|  | March 31, |
|  | 2024 |  |  | 2023 |
Purchaser A |  |  | 28 | % |  |  | 11 | %
Purchaser B |  |  | 23 | % |  |  | 18 | %
Purchaser C |  |  | 11 | % |  |  | 0 | %
Purchaser D |  |  | 0 | % |  |  | 15 | %
Purchaser E |  |  | 0 | % |  |  | 13 | %

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