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LEASES (Schedule of Lease Liabilities) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 USD ($)
Disclosure Of Quantitative Information About Lease Liabilities [Line Items] |
Balance at beginning of year | $ 1,603
Additions during year | 0
Deletions during year | 71
Interest expense during year | 186
Exchange differences during year | 191
Payments during year | 698
Balance at end of year | 1,211
Property [member] |
Disclosure Of Quantitative Information About Lease Liabilities [Line Items] |
Balance at beginning of year | 1,409
Additions during year | 0
Deletions during year | 0
Interest expense during year | 176
Exchange differences during year | 174
Payments during year | 596
Balance at end of year | 1,163
Motor vehicles [member] |
Disclosure Of Quantitative Information About Lease Liabilities [Line Items] |
Balance at beginning of year | 194
Additions during year | 0
Deletions during year | 71
Interest expense during year | 10
Exchange differences during year | 17
Payments during year | 102
Balance at end of year | $ 48

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- Definition Addition in lease liabilities. + References No definition available. + Details
Name: | blrx_AdditionsLeaseLiabilities
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Deletions in lease liabilities. + References No definition available. + Details
Name: | blrx_DeletionsLeaseLiabilities
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | blrx_DisclosureOfQuantitativeInformationAboutLeaseLiabilitiesLineItems
Namespace Prefix: | blrx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Excahnge difference in lease liabilities. + References No definition available. + Details
Name: | blrx_ExchangeDifferencesDuringYear
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Interest expense on lease liabilities. + References No definition available. + Details
Name: | blrx_InterestExpenseLeaseLiabilities
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payments of lease liabilities. + References No definition available. + Details
Name: | blrx_PaymentsLeaseLiabilities
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_47_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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