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OIL AND NATURAL GAS PROPERTIES, NET - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Extractive Industries [Abstract] |  |  |  |
Depletion and depreciation expense | $ 3,800 | $ 4,300 | $ 11,700 | $ 8,200

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- Definition Oil and Gas, Depreciation And Depletion Expense + References No definition available. + Details
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Namespace Prefix: | actg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | srt_ExtractiveIndustriesAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration