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Note 13 - Leases - Lease Amounts Included in Statement of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of leases [line items] |  |  |
Expense relating to short-term leases (included in other operating expenses) | $ (1,251) | $ (1,254) | $ (2,609)
Interest expense (included in finance expense) | (518) | (356) | (242)
Foreign exchange gain (loss) | 601 | (196) | 103
Total lease-related expenses | (5,520) | (5,441) | (6,431)
Office properties [member] |  |  |
Disclosure of leases [line items] |  |  |
Depreciation expense of right-of-use assets | (1,838) | (1,664) | (2,047)
Equipment [member] |  |  |
Disclosure of leases [line items] |  |  |
Depreciation expense of right-of-use assets | $ (2,514) | $ (1,971) | $ (1,636)

X
- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepreciationRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_c&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of interest expense on lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_InterestExpenseOnLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Disclosure of leases. + References No definition available. + Details
Name: | opra_DisclosureOfLeasesLineItems
Namespace Prefix: | opra_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gains (losses) arising from foreign net exchange relating to leases. + References No definition available. + Details
Name: | opra_GainsLossesArisingFromForeignNetExchangeRelatingToLeases
Namespace Prefix: | opra_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of lease-related expenses. + References No definition available. + Details
Name: | opra_LeaserelatedExpenses
Namespace Prefix: | opra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=opra_OfficePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=opra_Equipment1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |