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v3.25.3

STARBOARD INVESTMENT - Services Agreement (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Starboard |  |
Class of Warrant or Right [Line Items] |  |
Reimbursements | $ 65 | $ 476

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- Definition Services Agreement, Payments For Reimbursement + References No definition available. + Details
Name: | actg_ServicesAgreementPaymentsForReimbursement
Namespace Prefix: | actg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_CounterpartyNameAxis=actg_StarboardValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |