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v3.20.1

Note 5 - Assets Held for Rent (Details Textual) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Assets Held for Rent, Depreciation | $ 128,000 | $ 0

X
- Definition The amount of depreciation expenses recognized for assets held for rent. + References No definition available. + Details
Name: | blfs_AssetsHeldForRentDepreciation
Namespace Prefix: | blfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration