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Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities (Tables) Sheet http://usnrg.com/20251231/role/statement-note-14-other-current-assets-and-accounts-payable-and-accrued-liabilities-tables Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities (Tables) Tables http://usnrg.com/20251231/role/statement-note-14-other-current-assets-and-accounts-payable-and-accrued-liabilities 41 false false R42.htm 995584 - Disclosure - Note 15 - Supplemental Disclosures of Cash Flow Information (Tables) Sheet http://usnrg.com/20251231/role/statement-note-15-supplemental-disclosures-of-cash-flow-information-tables Note 15 - Supplemental Disclosures of Cash Flow Information (Tables) Tables http://usnrg.com/20251231/role/statement-note-15-supplemental-disclosures-of-cash-flow-information 42 false false R43.htm 995585 - Disclosure - Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) (Tables) Sheet http://usnrg.com/20251231/role/statement-note-17-supplemental-oil-and-natural-gas-information-unaudited-tables Note 17 - 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Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details) Sheet http://usnrg.com/20251231/role/statement-note-14-other-current-assets-and-accounts-payable-and-accrued-liabilities-schedule-of-accounts-payable-and-accrued-liabilities-details Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details) Details 77 false false R78.htm 995620 - Disclosure - Note 15 - Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details) Sheet http://usnrg.com/20251231/role/statement-note-15-supplemental-disclosures-of-cash-flow-information-supplemental-disclosures-of-cash-flow-information-details Note 15 - Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details) Details 78 false false R79.htm 995621 - Disclosure - Note 16 - 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