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Note 12 - Trade and Other Receivables - Summary of Movements in Carrying Amount of Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Trade and other receivables [line items]
Current receivables from sale of investments		$ 32,797
Star X [member]
Trade and other receivables [line items]
Interest income	$ 165	1,556
Dividend set-off	(32,962)	(25,133)
Star X [member] | Carrying value [member]
Trade and other receivables [line items]
Carrying amount as of January 1	32,797	56,374
Carrying amount as of December 31	$ 0	$ 32,797

X

- Definition

The amount of interest recognised as a receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

The cash inflow from sales of investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of current receivables from sale of investments.

+ References

No definition available.

+ Details

Name:	opra_CurrentReceivablesFromSaleOfInvestments
Namespace Prefix:	opra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents net receivables from sale of investments.

+ References

No definition available.

+ Details

Name:	opra_NetReceivablesFromSaleOfInvestments
Namespace Prefix:	opra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Trade and other receivables.

+ References

No definition available.

+ Details

Name:	opra_TradeAndOtherReceivablesLineItems
Namespace Prefix:	opra_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=opra_StarXMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MeasurementAxis=opra_CarryingValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: