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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Schedule of Sales and Marketing Expenses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of supplementary financial statement information [Abstract] |  |  |
Payroll and related expenses | $ 0 | $ 12,224 | $ 8,868
Medical Affairs | 0 | 2,891 | 4,824
Marketing | 0 | 2,041 | 4,091
Travel | 0 | 1,506 | 986
Office-related expenses | 0 | 1,477 | 1,923
Business Analytics | 0 | 1,264 | 1,005
Market Access | 0 | 701 | 1,606
Professional fees | 0 | 627 | 745
Share-based compensation | 0 | 98 | 751
Depreciation and amortization | 0 | 330 | 314
Loss on abandonment of right-of-use asset | 0 | 246 | 0
Other | 0 | 200 | 157
Sales and marketing expenses | $ 0 | $ 23,605 | $ 25,270

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Market access expenses. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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Balance Type: | debit
Period Type: | duration

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- Definition Medical Affairs. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Sales and marketing expenses related to sales. + References No definition available. + Details
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Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Payroll and related expenses, including vehicles. + References No definition available. + Details
Name: | blrx_SalesAndMarketingPayrollExpense
Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Sales and marketing professional fees. + References No definition available. + Details
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Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Sales and marketing Share-based compensation. + References No definition available. + Details
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Namespace Prefix: | blrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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