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Note 11 - Related Party Transactions (Details Textual) Pure in Millions, $ in Millions |  |  |  | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2023 shares | Jul. 19, 2023 shares | Sep. 02, 2022 shares | Sep. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | May 31, 2022
Stock Issued During Period, Shares, New Issues | shares |  | 14,835,000 | 3,933,376 |  |  |  |
Existing Stockholders [Member] | Public Stock Offering [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares | 10,000,000 |  |  |  |  |  |
Pilot Exploration Inc. [Member] |  |  |  |  |  |  |
Supply Commitment, Minimum Barrels of Produced Water |  |  |  |  |  |  | 29.2
Pilot Exploration Inc. [Member] | Water Treatment Services [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction | $ |  |  |  |  |  | $ 2.0 |
Pilot Exploration Inc. [Member] | Water Treatment Services [Member] | Flat Top Operating Area [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction | $ |  |  |  | $ 6.5 | $ 1.5 | $ 1.6 |

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