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Note 12 - Revenue (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Revenues By Product Line [Table Text Block] |
|  | Three Month Period Ended |  |  | Six Month Period Ended |
|  | June 30, |  |  | June 30, |
(In thousands) |  | 20 20 |  |  | 201 9 |  |  | 20 20 |  |  | 201 9 |
Biopreservation media |  | $ | 6,667 |  |  | $ | 6,327 |  |  | $ | 15,339 |  |  | $ | 12,097 |
Automated thawing |  |  | 376 |  |  |  | 374 |  |  |  | 770 |  |  |  | 374 |
evo shippers |  |  | 439 |  |  |  | — |  |  |  | 877 |  |  |  | — |
Freezers and accessories |  |  | 2,438 |  |  |  | — |  |  |  | 5,096 |  |  |  | — |
Total |  | $ | 9,920 |  |  | $ | 6,701 |  |  | $ | 22,082 |  |  | $ | 12,471 |

X
- 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

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