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11. Subsequent Event (Details Narrative) (USD $)	Mar. 31, 2013
Subsequent Event Details Narrative
Short term note	$ 250,000

X

- Definition

Custom Element.

+ References

No definition available.

+ Details

Name:	BLFS_ShortTermNote
Namespace Prefix:	BLFS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	BLFS_SubsequentEventAbstract
Namespace Prefix:	BLFS_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration