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Note 5 - Discontinued Operations (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 22, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Proceeds from Divestiture of Businesses, Net of Cash Divested, Total |  | $ 1,002 | $ 15,754
Denville [Member] |  |  |
Disposal Group, Including Discontinued Operation, Consideration | $ 20,000 |  |
Earn Out Provision of Discontinued Operations | 3,000 |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested, Total | 15,700 |  |
Maximum Contingent Consideration Based on 2018 Operating Results | 2,000 |  |
Maximum Contingent Consideration Based on 2019 Operating Results | $ 1,000 |  |
Escrow Amount, Released |  | $ 1,000 |

X
- Definition The earn out provision of disontinued operations receivable included in the sale price of the disontinued operations. + References No definition available. + Details
Name: | hbio_EarnOutProvisionOfDiscontinuedOperations
Namespace Prefix: | hbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of escrow released. + References No definition available. + Details
Name: | hbio_EscrowAmountReleased
Namespace Prefix: | hbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The maximum amount of contingent consideration based on 2018 operating results. + References No definition available. + Details
Name: | hbio_MaximumContingentConsiderationBasedOn2018OperatingResults
Namespace Prefix: | hbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The maximum amount of contingent consideration based on 2019 operating results. + References No definition available. + Details
Name: | hbio_MaximumContingentConsiderationBasedOn2019OperatingResults
Namespace Prefix: | hbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the cash inflow during the period from the sale of a component of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=hbio_DenvilleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |