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Note 7 - Related Party Transactions (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
The Multi Channel Systems Facility and Triangle BioSystems Lease Agreements [Member]
Operating Lease, Expense	$ 0.3	$ 0.3

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=121603541&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: