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Organization and significant accounting policies - Schedule of Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Dec. 31, 2024
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Rental revenue |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Service revenue |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year

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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Details
Name: | srt_ProductOrServiceAxis=blfs_RentalRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |