XML 16 R60.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 7 - Deferred Rent (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2018
Amortization of Deferred Rent | $ 32,000 |  | $ 63,000 | $ 95,000 | $ 127,000

X
- Definition The amount of amortization charged against earnings during the period for deferred rent. + References No definition available. + Details
Name: | blfs_AmortizationOfDeferredRent
Namespace Prefix: | blfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration