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Note 19 - Subsequent Event (Details Textual) $ in Millions	Apr. 18, 2020 USD ($)
Subsequent Event [Member]
Proceeds From Paycheck Protection Program Under CARES Act	$ 6.1

X

- Definition

The cash inflow received from loan funding under the Paycheck Protection Program which was established under the Coronavirus Aid, Relief and Economic Security (CARES) Act in March 2020.

+ References

No definition available.

+ Details

Name:	hbio_ProceedsFromPaycheckProtectionProgramUnderCARESAct
Namespace Prefix:	hbio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: