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v3.20.1

Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Property, Plant and Equipment, Useful Lives [Table Text Block] |
| Machinery and equipment | 3 | - | 10 |  | years
| Computer equipment and software | 3 | - | 7 |  | years
| Furniture and fixtures | 5 | - | 10 |  | years

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- Definition Tabular disclosure of useful lives of property, plant and equipment. + References No definition available. + Details
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Namespace Prefix: | hbio_
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