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Consolidated Statements of Shareholders' Equity (Parentheticals) - shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Statement of Stockholders' Equity [Abstract] |  |
Class of warrant or right, exercised during period (in shares) | 79,100 | 79,100

X
- Definition The number of warrants or rights exercised during period. + References No definition available. + Details
Name: | blfs_CashlessWarrantExercisesInShares
Namespace Prefix: | blfs_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration