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Note 3 - Revenue Recognition - Schedule of Contract Liabilities from Contracts with Customers from Acquisition (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Contract acquisition costs, current | $ 168 | $ 113
Contract acquisition costs, long-term | 4 | 9
Total | $ 172 | $ 122

X
- Definition Represents Contract Acquisition Costs, Current + References No definition available. + Details
Name: | dmrc_ContractAcquisitionCostsCurrent
Namespace Prefix: | dmrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents Contract Acquisition Costs, Noncurrent + References No definition available. + Details
Name: | dmrc_ContractAcquisitionCostsNoncurrent
Namespace Prefix: | dmrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents Contract Acquisition Costs, total + References No definition available. + Details
Name: | dmrc_ContractAcquisitionCostsTotal
Namespace Prefix: | dmrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant