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Note 12 - Revenue (Tables) | 3 Months Ended
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Mar. 31, 2020
Notes Tables |
Revenues By Product Line [Table Text Block] |
|  | Three Months Ended March 31, |
(In thousands, except percentages) |  | 2020 |  |  | 2019 |
Biopreservation media |  | $ | 8,672 |  |  | $ | 5,770 |
Automated thawing |  |  | 394 |  |  | –– |
evo shippers |  |  | 438 |  |  | –– |
Freezers and accessories |  |  | 2,658 |  |  | –– |
Total revenue |  | $ | 12,162 |  |  | $ | 5,770 |

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- Definition Tabular disclosure of revenues by product line. + References No definition available. + Details
Name: | blfs_RevenuesByProductLineTableTextBlock
Namespace Prefix: | blfs_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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