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Note 15 - Financial Assets and Financial Liabilities (Details Textual) $ in Millions	Dec. 31, 2024 USD ($)
Disclosure of financial assets [line items]
Percentage of strengthening in closing exchange rate of foreign currencies	5.00%
Percentage of weakening in closing exchange rate of foreign currencies	5.00%
Investment, interest rate	8.00%
Price Risk [member] | USDC and USDT [member]
Disclosure of financial assets [line items]
Current financial assets	$ 0.8

X

- Definition

The amount of current financial assets. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_CurrentFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The rate of interest on investment.

+ References

No definition available.

+ Details

Name:	opra_InvestmentInterestRate1
Namespace Prefix:	opra_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of strengthening in closing foreign exchange rate.

+ References

No definition available.

+ Details

Name:	opra_PercentageOfStrengtheningInClosingForeignExchangeRate
Namespace Prefix:	opra_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of weakening in closing foreign exchange rate.

+ References

No definition available.

+ Details

Name:	opra_PercentageOfWeakeningInClosingForeignExchangeRate
Namespace Prefix:	opra_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=opra_PriceRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=opra_USDCAndUSDTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: