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Note 8 - Property, Plant and Equipment (Details Textual) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Fully Depreciated and Disposed of Property and Equipment Removed From Fixed Asset Records | $ 4.8

X
- Definition The amount of fully depreciated and disposed of property and equipment removed from fixed asset records. + References No definition available. + Details
Name: | hbio_FullyDepreciatedAndDisposedOfPropertyAndEquipmentRemovedFromFixedAssetRecords
Namespace Prefix: | hbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration