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Note 6 - Related Party Transactions (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
The Multi Channel Systems Facility and Triangle BioSystems Lease Agreements [Member]
Operating Lease, Expense	$ 0.1	$ 0.1	$ 0.2	$ 0.2

X

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_LeaseContractualTermAxis=hbio_TheMultiChannelSystemsFacilityAndTriangleBiosystemsLeaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: